Difference between revisions of "Mercury - intermodulation (IMD) tests"

Latest revision as of 10:45, 25 January 2010

The use by Amateurs of receivers that use Digital Down Conversion (DDC), where the antenna is effectively connected directly to an Analogue to Digital Converter (ADC), is relatively new.

DDC based receivers perform differently to conventional analogue receiver particularly when intermodulation (IMD) testing is performed. Unlike an analogue receiver the IMD varies with the level of input signals. This renders the value of conventional 3rd order intercept (IP3) meaningless.

The reason for the variation of IP3 with signal level is that for small input signals only a small number of the available ADC bits are actually used. Also since these are near the origin of the ADC transfer curve there are often imperfections that degrade the IP3 performance.

We can reduce the effect of the limited number of bits and ADC non-linearity by deliberately adding additional signal(s) into the input of the ADC such that our low level signals are added to the (larger) additional signal(s). In effect the larger signal sweeps our small signal over a wider portion of the ADC transfer curve. This means that our combined signal spends less time over any non-linear portions and also uses more ADC bits.

You can perhaps think of the additional signal giving the small signal a ‘piggy back ride’ across the ADC transfer curve.

As long as the instantaneous sum of the additional signal(s) and our wanted signal does not overload our ADC then the overall effect is beneficial.

So here is a significant difference between our existing analogue receivers and a DDC based receiver. In the former case we go to a lot of trouble to keep large out of band signals out of the input of the receiver. In the latter case, up to a certain level, they actually are an advantage!

The additional signal(s) can come from a number of sources. The LT2208 ADC that is used in Mercury has the facility to inject pseudo random noise into its input. This noise can then be subtracted at the output. This technique is known as ‘dithering’.

By subtracting the noise at the output of the ADC we only degrade the overall signal to noise ratio of the ADC by a few dB. Alternatively, we could inject an out-of-band signal into the antenna socket and use this as a source of dithering. Or perhaps there are enough strong signals already present at the input of the ADC to perform the dithering function so there is no need to either inject random noise or a specific out of band signal.

So is the effect of poor IMD performance at low signal levels a real life issue or just something we see in the non real world of lab testing? So far the poor IMD at low signal levels does not seem to be a major issue amongst users of DDC based receivers. I am sure we would have heard by now it this wasn’t the case!

So exactly what is happening when we expose a DDC to a band full of strong and weak signals and how should we make use of the dither facility of the LT2208?

Test Introduction

What follows is an excellent evaluation of this effect by HB9AJG and is quite possibly the first time such comprehensive measurements have been made on an Amateur DDC receiver.

There is an additional test that HB9AJG has done which is as follows. The LT2208 is a very small chip with one side of the device accepting uV signals (i.e. the input) and the other producing 3.3v digital signals (i.e. the digitally converted output). Stray capacitance across the chip + PCB, etc will mean that some of these digital signals will find their way to the input.

This has the effect of raising the noise floor of the receiver and also introducing spurs at certain frequencies as the receiver is tuned.

The way that the LT2208 overcomes this problem is to scramble the digital output so the energy is dispersed over a wider band. This is what the 'Random’ control in PowerSDR does. The ADC output is first descrambled in the Mercury FPGA before processing further.

I would have expected that the scrambler would have little effect on the IMD performance of Mercury. As we can see from the results this is not the case.

I’d like to congratulate HP9AJG on an excellent series of measurements that go a long way to increasing our understanding as to how our new DDC receivers perform with real-world signals.

Phil Harman, VK6APH, 1 September 2009

Test Setup

Attenuation between generators: 74.8dB (terminated with 50 Ohms)
Attenuation from HP8640B to output: 36.2dB
Attenuation from HP8657A to output: 16.2dB

This test setup was verified with an EK070 RX by Rohde+Schwarz from 80m to 10m, CW, 600Hz bandwidth:

with it's 20dB input attenuator enabled, MDS was -114dBm

at -13dBm input (each signal) no IM was audible, i.e IM3DR > 101dB

without attenuator, MDS was -134dBm

at -25dBm input (each signal) IM was audible, i.e IM3DR = 109dB (on 80m, 40m 15m, 10m)

at -30dBm input (each signal) IM was audible, i.e IM3DR = 104dB (on 20m)

So the test setup has an IM3DR of >101dB with inputs up to -13dBm, and an IM3DR of 104dBm at -30dBm for 20m, and an IM3DR of 109dBm at -25dBm for 80m, 40m, 15m, 10m.

MERCURY 3^rd Order Intermodulation Free Dynamic Range IM3DR

May/June 2009/HB9AJG

Configuration:

Mercury v2.6, Ozy v1.2, Penny v1.1

Dither & Random enabled (RX sensitivity reduced by 4dB)

Clocks from Penelope

PowerSDR v1.10.4+BaseSVN 2025

PowerSDR RX-Meter calibrated to HP8657A

Bandwidth 48kHz, Buffer size 2048Bits

CWL, 500Hz

Lower frequency = HP8657A
Upper frequency = HP8640B
All dBm readings as displayed on the RX-Meter of PowerSDR (rounded to the next dB)
Signals 3dB above the Noise Floor are considered MDS.
Maximum input signals possible with this Test Setup: -13dBm

* = Artifacts from the ADC (very nonlinearly dependent on the input signals)

** = ADC Overload @ -20dBm

80m: 3680kHz + 3700kHz

Preamp OFF: Noise Floor = -115dBm

Inputs each	dBm	-15	-20	-30	-40	-50	-60	-70
IM @ - ∆f	dBm	-110	-	-	-	-	-112*	-
IM @ +∆f	dBm	-113	-	-	-	-	-113*	-
IM3DR	dB	96.5					52.5

Preamp ON: Noise Floor = -134dBm

Inputs each	dBm	-20	-25	-30	-35	-40	-50	-60	-70	-80	-90
IM @ - ∆f	dBm	-108	-125	-125	-131	-	-	-	-134*	-132*	-
IM @ +∆f	dBm	-108	-128	-126	-132	-	-	-	-134*	-132*	-
IM3DR	dB	88	101.5	95.5	96.5				64	52

40m: 7000kHz + 7020kHz

Preamp OFF: Noise Floor = -115dBm

Inputs each	dBm	-15	-20	-30	-40	-50	-60	-70
IM @ - ∆f	dBm	-109	-	-	-	-	-114*	-
IM @ +∆f	dBm	-112	-	-	-	-	-114*	-
IM3DR	dB	95.5					54

Preamp ON: Noise Floor = -134dBm

Inputs each	dBm	-20	-25	-30	-35	-40	-50	-60	-70	-80	-90
IM @ - ∆f	dBm	-111	-127	-123	-130	-	-	-	-	-	-
IM @ +∆f	dBm	-109	-	-126	-133	-	-	-	-	-	-
IM3DR	dB	90	102	94.5	96.5

20m: 14080kHz + 14100kHz

Preamp OFF: Noise Floor = -114dBm

Inputs each	dBm	-15	-20	-30	-40	-50	-60	-70
IM @ - ∆f	dBm	-113	-	-	-	-	-	-
IM @ +∆f	dBm	-114	-	-	-	-	-	-
IM3DR	dB	98.5

Preamp ON: Noise Floor = -134dBm

Inputs each	dBm	-21**	-25	-30	-35	-40	-50	-60	-70	-80	-90
IM @ - ∆f	dBm	-116	-125	-126	-131	-	-	-	-	-	-
IM @ +∆f	dBm	-112	-125	-123	-134	-	-	-	-	-	-
IM3DR	dB	93	100	94.5	97.5

15m: 21080kHz + 21100kHz

Preamp OFF: Noise Floor = -114dBm

Inputs each	dBm	-15	-20	-30	-40	-50	-60	-70
IM @ - ∆f		-107	-113*	-114*	-113*	-113*	-112*	-
IM @ +∆f	dBm	-106	-114*	-114*	-114*	-113*	-112*	-
IM3DR	dB	91.5	93.5	84	73.5	63	52

Preamp ON: Noise Floor = -133dBm

Inputs each	dBm	-21**	-25	-30	-35	-40	-50	-60	-70	-80	-90
IM @ - ∆f		-104	-115	-122	-129	-133*	-133*	-132*	-132*	-
IM @ +∆f	dBm	-103	-116	-120	-130		-132*	-131*	-131*	-
IM3DR	dB	82.5	90.5	91	94.5	-93	82.5	71.5	61.5

10m: 28080kHz + 28100kHz

Preamp OFF: Noise Floor = -113dBm

Inputs each	dBm	-15	-20	-30	-40	-50	-60	-70
IM @ - ∆f		-107	-113*	-113*	-113*	-111*	-110*	-
IM @ +∆f	dBm	-107	-113*	-113*	-112*	-111*	-110*	-
IM3DR	dB	92	93	83	72.5	61	50

Preamp ON: Noise Floor = -134dBm

Inputs each	dBm	-21**	-25	-30	-35	-40	-50	-60	-70	-80	-90
IM @ - ∆f		-96	-108	-120	-131	-131*	-128*	-128*	-128*	-128*	-
IM @ +∆f	dBm	-95	-107	-120	-134	-134*	-131*	-131*	-129*	-129*	-
IM3DR	dB	74.5	82.5	90	97.5	92.5	79.5	69.5	58.5	48.5

6m: 49080kHz + 49100kHz

Preamp OFF: Noise Floor = -113dBm

Inputs each	dBm	-15	-20	-30	-40	-50	-60	-70
IM @ - ∆f		-97	-111	-	-	-	-	-
IM @ +∆f	dBm	-95	-107	-	-	-	-	-
IM3DR	dB	81	89

Preamp ON: Noise Floor = -133dBm

Inputs each	dBm	-21**	-25	-30	-35	-40	-50	-60	-70	-80	-90
IM @ - ∆f		-76	-89	-104	-120	-131	-130*	-132*	-132*	-	-
IM @ +∆f	dBm	-75	-88	-103	-118	-127	-130*	-132*	-132*	-	-
IM3DR	dB	54.5	63.5	73.5	84	89	80	72	62

Effect of "Dither" and "Random"

(August 2009 / HB9AJG)

Even slight imperfections of the ADC transfer curve will result in unwanted signals. The Dither signal randomizes the location of the input signal on the ADC transfer curve, resulting in an improved IMD performance. Part of the Dither signal will leak through to the output, causing a rise of the noise floor.

Due to the small size of the ADC, and depending on the PCB layout, coupling from the output to the input may occur. The Random signal is to prevent such interferences from appearing as regular spectral lines. So it would not be expected to have much effect on the IMD performance.

The tests below show that both signals are required to achieve the best IM3DR.

IM3 signals 3db above the noise floor are considered MDS.

80m: 3680kHz + 3700kHz, Preamp OFF

Dither enabled,

Random enabled:

Noise Floor = -115dBm

Inputs each	dBm	-15	-20	-30	-40	-50	-60	-70
IM @ - ∆f	dBm	-110	-	-	-	-	-112	-
IM @ +∆f	dBm	-112	-	-	-	-	-112	-
IM3DR	dB	96					52

Dither enabled,

Random disabled:

Noise Floor = -115dBm

Inputs each	dBm	-15	-20	-30	-40	-50	-60	-70
IM @ - ∆f	dBm	-102	-102	-99	-99	-98	-98	-110
IM @ +∆f	dBm	-103	-104	-99	-100	-98	-97	-110
IM3DR	dB	87.5	83	69	59.5	48	37.5	40

Dither disabled,

Random enabled:

Noise Floor = -118dBm

Inputs each	dBm	-15	-20	-30	-40	-50	-60	-70
IM @ - ∆f	dBm	-106	-110	-98	-102	-112	-113	-
IM @ +∆f	dBm	-110	-107	-98	-102	-110	-114	-
IM3DR	dB	93	88.5	68	62	61	53.5

Dither disabled,

Random disabled:

Noise Floor = -118dBm

Inputs each	dBm	-15	-20	-30	-40	-50	-60	-70
IM @ - ∆f	dBm	-101	-105	-94	-97	-100	-113	-116
IM @ +∆f	dBm	-104	-106	-95	-97	-101	-114	-116
IM3DR	dB	87.5	85.5	64.5	57	50.5	53.5	46

20m: 14080kHz + 14100kHz, Preamp OFF

Dither enabled,

Random enabled:

Noise Floor = -114dBm

Inputs each	dBm	-15	-20	-30	-40	-50	-60	-70
IM @ - ∆f	dBm	-113	-	-	-	-	-112	-
IM @ +∆f	dBm	-114	-	-	-	-	-113	-
IM3DR	dB	98.5					52.5

Dither enabled,

Random disabled:

Noise Floor = -115dBm

Inputs each	dBm	-15	-20	-30	-40	-50	-60	-70
IM @ - ∆f	dBm	-96	-96	-92	-90	-92	-99	-114
IM @ +∆f	dBm	-98	-97	-95	-92	-93	-100	-114
IM3DR	dB	82	76.5	63.5	51	42.5	39.5	44

Dither disabled,

Random enabled:

Noise Floor = -117dBm

Inputs each	dBm	-15	-20	-30	-40	-50	-60	-70
IM @ - ∆f	dBm	-105	-114	-96	-100	-111	-115	-
IM @ +∆f	dBm	-108	-111	-97	-99	-110	-114	-
IM3DR	dB	91.5	92.5	66.5	59.5	60.5	54.5

Dither disabled,

Random disabled:

Noise Floor = -118dBm

Inputs each	dBm	-15	-20	-30	-40	-50	-60	-70
IM @ - ∆f	dBm	-97	-94	-91	-91	-95	-100	-116
IM @ +∆f	dBm	-96	-98	-94	-92	-95	-100	-116
IM3DR	dB	81.5	76	62.5	51.5	45	40	46

MERCURY IM3DR with a third signal present

(May/June 2009/ HB9AJG)

In his presentation on the design of MERCURY at the ARRL/TAPR Conference on Digital Communications 2008 Phil Harman explains that other strong signals have the same effect as "Dither enabled". To verify this, a second coupler and a third signal generator were added to the Test Setup:

"Dither" and "Random" were disabled, and the measurements on 20m were repeated:

20m: 14080kHz + 14100kHz

Random disabled and Dither disabled

Preamp OFF: Noise Floor = -118dBm

Inputs each	dBm				-15	-20	-30	-40	-50	-60	-70

No third signal

IM @ - ∆f	dBm	-97	-94	-91	-91	-95	-100	-116
IM @ +∆f	dBm	-96	-98	-94	-92	-95	-100	-116
IM3DR	dB						40	46

Third signal	-52dBm*
IM @ - ∆f	dBm		-94	-91	-92	-100	-114	-
IM @ +∆f	dBm		-98	-94	-92	-100	-114	-
IM3DR	dB					50	54

Third signal	-47dBm*
IM @ - ∆f	dBm		-94	-92	-93	-114	-	-
IM @ +∆f	dBm		-98	-93	-94	-114	-	-
IM3DR	dB				53	64

Third signal	-14dBm*
IM @ - ∆f	dBm		-112	-112	-114	-	-	-
IM @ +∆f	dBm		-112	-112	-114	-	-	-
IM3DR	dB			82	74

Frequency of the third signal: anywhere between 1 and 30MHz (except harmonics and IMs)

*Approximate signal level, the limit is fuzzy: at levels up to about 10dB higher IM signals vary between nil and MDS

With very strong third signals (S9+60dB), an improvement of the IM3DR of approximately 30db is achieved.

However, this is not as much as with "Dither" and "Random" enabled (copy from above):

20m: 14080kHz + 14100kHz

Random enabled and Dither enabled

Preamp OFF: Noise Floor = -114dBm

Inputs each	dBm	-15	-20	-30	-40	-50	-60	-70
IM @ - ∆f	dBm	-113	-	-	-	-	-	-
IM @ +∆f	dBm	-114	-	-	-	-	-	-
IM3DR	dB	98.5

Now, of course, the next step was to connect my DX-88 8-band trap vertical instead of the third signal generator (no filters between antenna and Mercury):

Random disabled and Dither disabled

Band	Preamp	Noise floor	UTC	max gen level for IM3 < MDS	Comment	IM3DR
20m	OFF	-114dBm	15:30	-50 dBm	varies slightly with time	64dB
	ON	-115dBm		-41dBm	(fading effects?)	74dB

40m	OFF	-108dBm	16:0	-40 dBm	varies slightly	68dB
	ON	-108dBm		-24dBm		84dB

80m	OFF	-97dBm	16:10	-34 dBm	varies slightly	63dB
	ON	-97dBm		-22dBm	just before ADC Overload!	75dB

15m	OFF	-114dBm	16:20	-46 dBm	varies by several dB	68dB
	ON	-116dBm		-40dBm		76dB

10m	OFF	-116dBm	16:30	-47 dBm	varies by several dB	69dB
	ON	-123dBm		-45dBm		78dB

6m	OFF	-118dBm	16:40	-46 dBm	varies slightly	72dB
	ON	-136dBm		-50dBm		86dB

CONCLUSION

The antenna has about the same effect as a third signal generator. Enabling "Dither" and "Random" results in a much higher IM3DR, however. Therefore, I think if a band is heavily congested, it is preferable to enable "Dither" and "Random" and to accept the degradation of sensitivity of 4dB.

Difference between revisions of "Mercury - intermodulation (IMD) tests"

Latest revision as of 10:45, 25 January 2010

Contents

Test Introduction

Test Setup

MERCURY 3^rd Order Intermodulation Free Dynamic Range IM3DR

Effect of "Dither" and "Random"

MERCURY IM3DR with a third signal present

CONCLUSION

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@@ Line 7: / Line 7: @@
 The reason for the variation of IP3 with signal level is that for small input signals only a small number of the available ADC bits are actually used. Also since these are near the origin of the ADC transfer curve there are often imperfections that degrade the IP3 performance.
-We can reduce the effect of the limited number of bits and ADC non-linearity buy deliberately adding additional signal(s) into the input of the ADC such that our low level signals are added to the (larger) additional signal(s). In effect the larger signal sweeps our small signal over a wider portion of the ADC transfer curve. This means that our combined signal spends less time over any non-linear portions and also uses more ADC bits.
+We can reduce the effect of the limited number of bits and ADC non-linearity by deliberately adding additional signal(s) into the input of the ADC such that our low level signals are added to the (larger) additional signal(s). In effect the larger signal sweeps our small signal over a wider portion of the ADC transfer curve. This means that our combined signal spends less time over any non-linear portions and also uses more ADC bits.
 You can perhaps think of the additional signal giving the small signal a ‘piggy back ride’ across the ADC transfer curve.
@@ Line 15: / Line 15: @@
 So here is a significant difference between our existing analogue receivers and a DDC based receiver. In the former case we go to a lot of trouble to keep large out of band signals out of the input of the receiver. In the latter case, up to a certain level, they actually are an advantage!
-The additional signal(s) can come from a number of sources. The LT2208 ADC that is used in Mercury has the facility to inject pseudo random noise into its input.  This noise can then be subtracted at the output. This technique is known as ‘dithering’.
+The additional signal(s) can come from a number of sources. The LT2208 ADC that is used in [[MERCURY|Mercury]] has the facility to inject pseudo random noise into its input.  This noise can then be subtracted at the output. This technique is known as ‘dithering’.
 By subtracting the noise at the output of the ADC we only degrade the overall signal to noise ratio of the ADC by a few dB. Alternatively, we could inject an out-of-band signal into the antenna socket and use this as a source of dithering. Or perhaps there are enough strong signals already present at the input of the ADC to perform the dithering function so there is no need to either inject random noise or a specific out of band signal.
@@ Line 28: / Line 28: @@
 What follows is an excellent evaluation of this effect by HB9AJG and is quite possibly the first time such comprehensive measurements have been made on an Amateur DDC receiver.
-There is an additional test that HB9AJG has done which is as follows. The LT2208 is a very small chip with one side of the device accepting uV signals (i.e. the input) and the other producing  3.3v digital signals (i.e. the digitally converted output). Stray capacitance across the chip + PCB, strays, etc will mean that some of these digital signals will find their way to the input.
+There is an additional test that HB9AJG has done which is as follows. The LT2208 is a very small chip with one side of the device accepting uV signals (i.e. the input) and the other producing  3.3v digital signals (i.e. the digitally converted output). Stray capacitance across the chip + PCB, etc will mean that some of these digital signals will find their way to the input.
 This has the effect of raising the noise floor of the receiver and also introducing spurs at certain frequencies as the receiver is tuned.
@@ Line 42: / Line 42: @@
 ==Test Setup==
+<br />
 [[Image:MERCURY IM3DR 1.gif]]
@@ Line 50: / Line 51: @@
 This test setup was verified with an EK070 RX by Rohde+Schwarz from 80m to 10m, CW, 600Hz bandwidth:
-:with 20dB attenuator enabled, MDS was -114dBm
+:with it's 20dB input attenuator enabled, MDS was -114dBm
 ::''at -13dBm input (each signal) no IM was audible, i.e IM3DR > 101dB''
 :without attenuator, MDS was -134dBm
 ::''at -25dBm input (each signal) IM was audible, i.e IM3DR = 109dB (on 80m, 40m 15m, 10m)''
 ::''at -30dBm input (each signal) IM was audible, i.e IM3DR = 104dB (on 20m)''
+So the test setup has an IM3DR of >101dB with inputs up to -13dBm, and an IM3DR of 104dBm at -30dBm for 20m, and an IM3DR of 109dBm at -25dBm for 80m, 40m, 15m, 10m.
 == MERCURY 3<sup>rd</sup> Order Intermodulation Free Dynamic Range IM3DR ==
+May/June 2009/HB9AJG
 Configuration:
@@ Line 75: / Line 80: @@
 :<nowiki>** =</nowiki> ADC Overload @ -20dBm
-===80m: 3680kHz + 3700kHz===
+{| {{table}}
+| align="left" style="background:#f0f0f0;"|'''80m:  3680kHz + 3700kHz'''
-'''Preamp OFF''':Noise Floor = -115dBm
-{| class="wikitable" cellspacing="10"
 |-
-|Inputs each
-|dBm
+| Preamp OFF:    Noise Floor = -115dBm
-|<nowiki>-15</nowiki>
-|<nowiki>-20</nowiki>
-|<nowiki>-30</nowiki>
-|<nowiki>-40</nowiki>
-|<nowiki>-50</nowiki>
-|<nowiki>-60</nowiki>
-|<nowiki>-70</nowiki>
 |-
-|<nowiki>IM @ -∆f</nowiki>
-|dBm
-|<nowiki>-110</nowiki>
-|
-|
-|
-|
-|<nowiki>-112*</nowiki>
-|
 |
+|}
+{| {{table}}
+|-
+| width="77" height="13" valign="bottom" | Inputs each
+| width="47"  valign="bottom" | dBm
+| width="47" align="center" valign="bottom" |
+| width="47" align="center" valign="bottom" |
+| width="47" align="center" valign="bottom" |
+| width="47" align="center" valign="bottom" | -15
+| width="47" align="center" valign="bottom" | -20
+| width="47" align="center" valign="bottom" | -30
+| width="47" align="center" valign="bottom" | -40
+| width="47" align="center" valign="bottom" | -50
+| width="47" align="center" valign="bottom" | -60
+| width="47" align="center" valign="bottom" | -70
+|-
+| height="13" valign="bottom" | IM @ - ∆f
+|  valign="bottom" | dBm
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" | -110
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -112*
+| align="center" valign="bottom" | -
+|-
+| height="13" valign="bottom" | IM @ +∆f
+|  valign="bottom" | dBm
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" | -113
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -113*
+| align="center" valign="bottom" | -
+|-
+|style="font-weight:bold" height="13" valign="bottom" | IM3DR
+|style="font-weight:bold"  valign="bottom" | dB
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+|style="font-weight:bold" align="center" valign="bottom" | 96.5
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" | 52.5
+| align="center" valign="bottom" |
+|-
+| height="13"  valign="bottom" |
+|  valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+|}
+{| {{table}}
+| Preamp ON:    Noise Floor = -134dBm
 |-
-|<nowiki>IM @ +∆f</nowiki>
-|dBm
+|
-|<nowiki>-113</nowiki>
-|
+|}
-|
-|
+{| {{table}}
-|
-|<nowiki>-113*</nowiki>
+|-
-|
-|
+| width="77" height="13" valign="bottom" | Inputs each
+| width="47"  valign="bottom" | dBm
+| width="47" align="center" valign="bottom" | -20
+| width="47" align="center" valign="bottom" | -25
+| width="47" align="center" valign="bottom" | -30
+| width="47" align="center" valign="bottom" | -35
+| width="47" align="center" valign="bottom" | -40
+| width="47" align="center" valign="bottom" | -50
+| width="47" align="center" valign="bottom" | -60
+| width="47" align="center" valign="bottom" | -70
+| width="47" align="center" valign="bottom" | -80
+| width="47" align="center" valign="bottom" | -90
+|-
+| height="13" valign="bottom" | IM @ - ∆f
+|  valign="bottom" | dBm
+| align="center" valign="bottom" | -108
+| align="center" valign="bottom" | -125
+| align="center" valign="bottom" | -125
+| align="center" valign="bottom" | -131
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -134*
+| align="center" valign="bottom" | -132*
+| align="center" valign="bottom" | -
+|-
+| height="13" valign="bottom" | IM @ +∆f
+|  valign="bottom" | dBm
+| align="center" valign="bottom" | -108
+| align="center" valign="bottom" | -128
+| align="center" valign="bottom" | -126
+| align="center" valign="bottom" | -132
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -134*
+| align="center" valign="bottom" | -132*
+| align="center" valign="bottom" | -
+|-
+|style="font-weight:bold" height="13" valign="bottom" | IM3DR
+|style="font-weight:bold"  valign="bottom" | dB
+| align="center" valign="bottom" | 88
+| align="center" valign="bottom" | 101.5
+| align="center" valign="bottom" | 95.5
+|style="font-weight:bold" align="center" valign="bottom" | 96.5
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" | 64
+| align="center" valign="bottom" | 52
+| align="center" valign="bottom" |
+|-
+|style="font-weight:bold" height="13"  valign="bottom" |
+|  valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+|}
+{| {{table}}
+| align="left" style="background:#f0f0f0;"|'''40m:  7000kHz + 7020kHz'''
 |-
-|'''IM3DR'''
-|'''dB'''
+| Preamp OFF:    Noise Floor = -115dBm
-|'''96.5'''
-|
+|-
-|
 |
-|
-|52.5
-|
-|
 |}
-'''Preamp ON''':Noise Floor = -134dBm
+{| {{table}}
+|-
+| width="77" height="13" valign="bottom" | Inputs each
+| width="47"  valign="bottom" | dBm
+| width="47" align="center" valign="bottom" |
+| width="47" align="center" valign="bottom" |
+| width="47" align="center" valign="bottom" |
+| width="47" align="center" valign="bottom" | -15
+| width="47" align="center" valign="bottom" | -20
+| width="47" align="center" valign="bottom" | -30
+| width="47" align="center" valign="bottom" | -40
+| width="47" align="center" valign="bottom" | -50
+| width="47" align="center" valign="bottom" | -60
+| width="47" align="center" valign="bottom" | -70
+|-
+| height="13" valign="bottom" | IM @ - ∆f
+|  valign="bottom" | dBm
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" | -109
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -114*
+| align="center" valign="bottom" | -
+|-
+| height="13" valign="bottom" | IM @ +∆f
+|  valign="bottom" | dBm
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" | -112
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -114*
+| align="center" valign="bottom" | -
+|-
+|style="font-weight:bold" height="13" valign="bottom" | IM3DR
+|style="font-weight:bold"  valign="bottom" | dB
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+|style="font-weight:bold" align="center" valign="bottom" | 95.5
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" | 54
+| align="center" valign="bottom" |
+|-
+| height="13"  valign="bottom" |
+|  valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+|}
+{| {{table}}
+| Preamp ON:    Noise Floor = -134dBm
-{| class="wikitable" cellspacing="10"
 |-
-|Inputs each
-|dBm
+|
-|<nowiki>-20</nowiki>
-|<nowiki>-25</nowiki>
+|}
-|<nowiki>-30</nowiki>
-|<nowiki>-35</nowiki>
+{| {{table}}
-|<nowiki>-40</nowiki>
-|<nowiki>-50</nowiki>
+|-
-|<nowiki>-60</nowiki>
-|<nowiki>-70</nowiki>
+| width="77" height="13" valign="bottom" | Inputs each
-|<nowiki>-80</nowiki>
-|<nowiki>-90</nowiki>
+| width="47"  valign="bottom" | dBm
+| width="47" align="center" valign="bottom" | -20
+| width="47" align="center" valign="bottom" | -25
+| width="47" align="center" valign="bottom" | -30
+| width="47" align="center" valign="bottom" | -35
+| width="47" align="center" valign="bottom" | -40
+| width="47" align="center" valign="bottom" | -50
+| width="47" align="center" valign="bottom" | -60
+| width="47" align="center" valign="bottom" | -70
+| width="47" align="center" valign="bottom" | -80
+| width="47" align="center" valign="bottom" | -90
+|-
+| height="13" valign="bottom" | IM @ - ∆f
+|  valign="bottom" | dBm
+| align="center" valign="bottom" | -111
+| align="center" valign="bottom" | -127
+| align="center" valign="bottom" | -123
+| align="center" valign="bottom" | -130
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -
+|-
+| height="13" valign="bottom" | IM @ +∆f
+|  valign="bottom" | dBm
+| align="center" valign="bottom" | -109
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -126
+| align="center" valign="bottom" | -133
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -
+|-
+|style="font-weight:bold" height="13" valign="bottom" | IM3DR
+|style="font-weight:bold"  valign="bottom" | dB
+| align="center" valign="bottom" | 90
+| align="center" valign="bottom" | 102
+| align="center" valign="bottom" | 94.5
+|style="font-weight:bold" align="center" valign="bottom" | 96.5
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+|-
+| height="13"  valign="bottom" |
+|  valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+|}
+{| {{table}}
+| align="left" style="background:#f0f0f0;"|'''20m:  14080kHz + 14100kHz'''
 |-
-|IM @ -∆f
-|dBm
+| Preamp OFF:    Noise Floor = -114dBm
-|<nowiki>-108</nowiki>
-|<nowiki>-125</nowiki>
-|<nowiki>-125</nowiki>
-|<nowiki>-131</nowiki>
-|
-|
-|
-|<nowiki>-134*</nowiki>
-|<nowiki>-132*</nowiki>
-|
 |-
-|IM @ +∆f
-|dBm
+|
-|<nowiki>-108</nowiki>
-|<nowiki>-128</nowiki>
+|}
-|<nowiki>-126</nowiki>
-|<nowiki>-132</nowiki>
+{| {{table}}
-|
-|
+|-
-|
-|<nowiki>-134*</nowiki>
+| width="77" height="13" valign="bottom" | Inputs each
-|<nowiki>-132*</nowiki>
-|
+| width="47"  valign="bottom" | dBm
+| width="47" align="center" valign="bottom" |
+| width="47" align="center" valign="bottom" |
+| width="47" align="center" valign="bottom" |
+| width="47" align="center" valign="bottom" | -15
+| width="47" align="center" valign="bottom" | -20
+| width="47" align="center" valign="bottom" | -30
+| width="47" align="center" valign="bottom" | -40
+| width="47" align="center" valign="bottom" | -50
+| width="47" align="center" valign="bottom" | -60
+| width="47" align="center" valign="bottom" | -70
+|-
+| height="13" valign="bottom" | IM @ - ∆f
+|  valign="bottom" | dBm
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" | -113
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -
+|-
+| height="13" valign="bottom" | IM @ +∆f
+|  valign="bottom" | dBm
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" | -114
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -
+|-
+|style="font-weight:bold" height="13" valign="bottom" | IM3DR
+|style="font-weight:bold"  valign="bottom" | dB
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+|style="font-weight:bold" align="center" valign="bottom" | 98.5
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+|-
+| height="13"  valign="bottom" |
+|  valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+|}
+{| {{table}}
+| Preamp ON:    Noise Floor = -134dBm
 |-
-|'''IM3DR'''
-|'''dB'''
+|
-|88
-|101.5
-|95.5
-|'''96.5'''
-|
-|
-|
-|64
-|52
-|
 |}
-===40m: 7000kHz + 7020kHz===
+{| {{table}}
+|-
+| width="77" height="13" valign="bottom" | Inputs each
+| width="47"  valign="bottom" | dBm
+| width="47" align="center" valign="bottom" | -21**
+| width="47" align="center" valign="bottom" | -25
+| width="47" align="center" valign="bottom" | -30
+| width="47" align="center" valign="bottom" | -35
+| width="47" align="center" valign="bottom" | -40
+| width="47" align="center" valign="bottom" | -50
+| width="47" align="center" valign="bottom" | -60
+| width="47" align="center" valign="bottom" | -70
+| width="47" align="center" valign="bottom" | -80
+| width="47" align="center" valign="bottom" | -90
+|-
+| height="13" valign="bottom" | IM @ - ∆f
+|  valign="bottom" | dBm
+| align="center" valign="bottom" | -116
+| align="center" valign="bottom" | -125
+| align="center" valign="bottom" | -126
+| align="center" valign="bottom" | -131
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -
+|-
+| height="13" valign="bottom" | IM @ +∆f
+|  valign="bottom" | dBm
+| align="center" valign="bottom" | -112
+| align="center" valign="bottom" | -125
+| align="center" valign="bottom" | -123
+| align="center" valign="bottom" | -134
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -
+|-
+|style="font-weight:bold" height="13" valign="bottom" | IM3DR
+|style="font-weight:bold"  valign="bottom" | dB
+| align="center" valign="bottom" | 93
+| align="center" valign="bottom" | 100
+| align="center" valign="bottom" | 94.5
+|style="font-weight:bold" align="center" valign="bottom" | 97.5
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+|-
+| height="13"  valign="bottom" |
+|  valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+|}
+{| {{table}}
+| align="left" style="background:#f0f0f0;"|'''15m:  21080kHz + 21100kHz'''
-'''Preamp OFF''': Noise Floor = -115dBm
-{| class="wikitable" cellspacing="10"
 |-
-|Inputs each
-|dBm
+| Preamp OFF:    Noise Floor = -114dBm
-|<nowiki>-15</nowiki>
-|<nowiki>-20</nowiki>
-|<nowiki>-30</nowiki>
-|<nowiki>-40</nowiki>
-|<nowiki>-50</nowiki>
-|<nowiki>-60</nowiki>
-|<nowiki>-70</nowiki>
 |-
-|<nowiki>IM @ -∆f</nowiki>
-|dBm
+|
-|<nowiki>-109</nowiki>
-|
+|}
-|
-|
+{| {{table}}
-|
-|114*
+|-
-|
-|
+| width="77" height="13" valign="bottom" | Inputs each
+| width="47"  valign="bottom" | dBm
+| width="47" align="center" valign="bottom" |
+| width="47" align="center" valign="bottom" |
+| width="47" align="center" valign="bottom" |
+| width="47" align="center" valign="bottom" | -15
+| width="47" align="center" valign="bottom" | -20
+| width="47" align="center" valign="bottom" | -30
+| width="47" align="center" valign="bottom" | -40
+| width="47" align="center" valign="bottom" | -50
+| width="47" align="center" valign="bottom" | -60
+| width="47" align="center" valign="bottom" | -70
+|-
+| height="13" valign="bottom" | IM @ - ∆f
+|  valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" | -107
+| align="center" valign="bottom" | -113*
+| align="center" valign="bottom" | -114*
+| align="center" valign="bottom" | -113*
+| align="center" valign="bottom" | -113*
+| align="center" valign="bottom" | -112*
+| align="center" valign="bottom" | -
+|-
+| height="13" valign="bottom" | IM @ +∆f
+|  valign="bottom" | dBm
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" | -106
+| align="center" valign="bottom" | -114*
+| align="center" valign="bottom" | -114*
+| align="center" valign="bottom" | -114*
+| align="center" valign="bottom" | -113*
+| align="center" valign="bottom" | -112*
+| align="center" valign="bottom" | -
+|-
+|style="font-weight:bold" height="13" valign="bottom" | IM3DR
+|style="font-weight:bold"  valign="bottom" | dB
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+|style="font-weight:bold" align="center" valign="bottom" | 91.5
+| align="center" valign="bottom" | 93.5
+| align="center" valign="bottom" | 84
+| align="center" valign="bottom" | 73.5
+| align="center" valign="bottom" | 63
+| align="center" valign="bottom" | 52
+| align="center" valign="bottom" |
+|-
+| height="13" valign="bottom" |
+|  valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+|}
+{| {{table}}
+| Preamp ON:    Noise Floor = -133dBm
 |-
-|<nowiki>IM @ +∆f</nowiki>
-|dBm
+|
-|<nowiki>-112</nowiki>
-|
+|}
-|
-|
+{| {{table}}
-|
-|114*
+|-
-|
-|
+| width="77" height="13" valign="bottom" | Inputs each
+| width="47"  valign="bottom" | dBm
+| width="47" align="center" valign="bottom" | -21**
+| width="47" align="center" valign="bottom" | -25
+| width="47" align="center" valign="bottom" | -30
+| width="47" align="center" valign="bottom" | -35
+| width="47" align="center" valign="bottom" | -40
+| width="47" align="center" valign="bottom" | -50
+| width="47" align="center" valign="bottom" | -60
+| width="47" align="center" valign="bottom" | -70
+| width="47" align="center" valign="bottom" | -80
+| width="47" align="center" valign="bottom" | -90
+|-
+| height="13" valign="bottom" | IM @ - ∆f
+|  valign="bottom" |
+| align="center" valign="bottom" | -104
+| align="center" valign="bottom" | -115
+| align="center" valign="bottom" | -122
+| align="center" valign="bottom" | -129
+| align="center" valign="bottom" | -133*
+| align="center" valign="bottom" | -133*
+| align="center" valign="bottom" | -132*
+| align="center" valign="bottom" | -132*
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" |
+|-
+| height="13" valign="bottom" | IM @ +∆f
+|  valign="bottom" | dBm
+| align="center" valign="bottom" | -103
+| align="center" valign="bottom" | -116
+| align="center" valign="bottom" | -120
+| align="center" valign="bottom" | -130
+| align="center" valign="bottom" |
+| align="center" valign="bottom" | -132*
+| align="center" valign="bottom" | -131*
+| align="center" valign="bottom" | -131*
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" |
+|-
+|style="font-weight:bold" height="13" valign="bottom" | IM3DR
+|style="font-weight:bold"  valign="bottom" | dB
+| align="center" valign="bottom" | 82.5
+| align="center" valign="bottom" | 90.5
+| align="center" valign="bottom" | 91
+|style="font-weight:bold" align="center" valign="bottom" | 94.5
+| align="center" valign="bottom" | -93
+| align="center" valign="bottom" | 82.5
+| align="center" valign="bottom" | 71.5
+| align="center" valign="bottom" | 61.5
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+|-
+| height="13"  valign="bottom" |
+|  valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+|}
+{| {{table}}
+| align="left" style="background:#f0f0f0;"|'''10m:  28080kHz + 28100kHz'''
 |-
-|'''IM3DR'''
-|'''dB'''
+| Preamp OFF:    Noise Floor = -113dBm
-|'''95.5'''
-|
+|-
-|
 |
-|
-|54
-|
-|
 |}
-'''Preamp ON''': Noise Floor = -134dBm
+{| {{table}}
+|-
+| width="77" height="13" valign="bottom" | Inputs each
+| width="47"  valign="bottom" | dBm
+| width="47" align="center" valign="bottom" |
+| width="47" align="center" valign="bottom" |
+| width="47" align="center" valign="bottom" |
+| width="47" align="center" valign="bottom" | -15
+| width="47" align="center" valign="bottom" | -20
+| width="47" align="center" valign="bottom" | -30
+| width="47" align="center" valign="bottom" | -40
+| width="47" align="center" valign="bottom" | -50
+| width="47" align="center" valign="bottom" | -60
+| width="47" align="center" valign="bottom" | -70
+|-
+| height="13" valign="bottom" | IM @ - ∆f
+|  valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" | -107
+| align="center" valign="bottom" | -113*
+| align="center" valign="bottom" | -113*
+| align="center" valign="bottom" | -113*
+| align="center" valign="bottom" | -111*
+| align="center" valign="bottom" | -110*
+| align="center" valign="bottom" | -
+|-
+| height="13" valign="bottom" | IM @ +∆f
+|  valign="bottom" | dBm
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" | -107
+| align="center" valign="bottom" | -113*
+| align="center" valign="bottom" | -113*
+| align="center" valign="bottom" | -112*
+| align="center" valign="bottom" | -111*
+| align="center" valign="bottom" | -110*
+| align="center" valign="bottom" | -
+|-
+|style="font-weight:bold" height="13" valign="bottom" | IM3DR
+|style="font-weight:bold"  valign="bottom" | dB
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+|style="font-weight:bold" align="center" valign="bottom" | 92
+| align="center" valign="bottom" | 93
+| align="center" valign="bottom" | 83
+| align="center" valign="bottom" | 72.5
+| align="center" valign="bottom" | 61
+|style="font-weight:bold" align="center" valign="bottom" | 50
+| align="center" valign="bottom" |
+|-
+| height="13"  valign="bottom" |
+|  valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+|}
+{| {{table}}
+| Preamp ON:    Noise Floor = -134dBm
-{| class="wikitable" cellspacing="10"
 |-
-|Inputs each
-|dBm
+|
-|<nowiki>-20</nowiki>
-|<nowiki>-25</nowiki>
+|}
-|<nowiki>-30</nowiki>
-|<nowiki>-35</nowiki>
+{| {{table}}
-|<nowiki>-40</nowiki>
-|<nowiki>-50</nowiki>
+|-
-|<nowiki>-60</nowiki>
-|<nowiki>-70</nowiki>
+| width="77" height="13" valign="bottom" | Inputs each
-|<nowiki>-80</nowiki>
-|<nowiki>-90</nowiki>
+| width="47"  valign="bottom" | dBm
+| width="47" align="center" valign="bottom" | -21**
+| width="47" align="center" valign="bottom" | -25
+| width="47" align="center" valign="bottom" | -30
+| width="47" align="center" valign="bottom" | -35
+| width="47" align="center" valign="bottom" | -40
+| width="47" align="center" valign="bottom" | -50
+| width="47" align="center" valign="bottom" | -60
+| width="47" align="center" valign="bottom" | -70
+| width="47" align="center" valign="bottom" | -80
+| width="47" align="center" valign="bottom" | -90
+|-
+| height="13" valign="bottom" | IM @ - ∆f
+|  valign="bottom" |
+| align="center" valign="bottom" | -96
+| align="center" valign="bottom" | -108
+| align="center" valign="bottom" | -120
+| align="center" valign="bottom" | -131
+| align="center" valign="bottom" | -131*
+| align="center" valign="bottom" | -128*
+| align="center" valign="bottom" | -128*
+| align="center" valign="bottom" | -128*
+| align="center" valign="bottom" | -128*
+| align="center" valign="bottom" | -
+|-
+| height="13" valign="bottom" | IM @ +∆f
+|  valign="bottom" | dBm
+| align="center" valign="bottom" | -95
+| align="center" valign="bottom" | -107
+| align="center" valign="bottom" | -120
+| align="center" valign="bottom" | -134
+| align="center" valign="bottom" | -134*
+| align="center" valign="bottom" | -131*
+| align="center" valign="bottom" | -131*
+| align="center" valign="bottom" | -129*
+| align="center" valign="bottom" | -129*
+| align="center" valign="bottom" | -
+|-
+|style="font-weight:bold" height="13" valign="bottom" | IM3DR
+|style="font-weight:bold"  valign="bottom" | dB
+| align="center" valign="bottom" | 74.5
+| align="center" valign="bottom" | 82.5
+| align="center" valign="bottom" | 90
+|style="font-weight:bold" align="center" valign="bottom" | 97.5
+| align="center" valign="bottom" | 92.5
+| align="center" valign="bottom" | 79.5
+| align="center" valign="bottom" | 69.5
+| align="center" valign="bottom" | 58.5
+|style="font-weight:bold" align="center" valign="bottom" | 48.5
+| align="center" valign="bottom" |
+|-
+|style="font-weight:bold" height="13"  valign="bottom" |
+|  valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+|}
+{| {{table}}
+| align="left" style="background:#f0f0f0;"|'''6m:  49080kHz + 49100kHz'''
 |-
-|IM @ -∆f
-|dBm
+| Preamp OFF:    Noise Floor = -113dBm
-|<nowiki>-111</nowiki>
-|<nowiki>-127</nowiki>
-|<nowiki>-123</nowiki>
-|<nowiki>-130</nowiki>
-|
-|
-|
-|
-|
-|
 |-
-|IM @ +∆f
-|dBm
+|
-|<nowiki>-109</nowiki>
-|
+|}
-|<nowiki>-126</nowiki>
-|<nowiki>-133</nowiki>
+{| {{table}}
-|
-|
+|-
-|
-|
+| width="77" height="13" valign="bottom" | Inputs each
-|
-|
+| width="47"  valign="bottom" | dBm
+| width="47" align="center" valign="bottom" |
+| width="47" align="center" valign="bottom" |
+| width="47" align="center" valign="bottom" |
+| width="47" align="center" valign="bottom" | -15
+| width="47" align="center" valign="bottom" | -20
+| width="47" align="center" valign="bottom" | -30
+| width="47" align="center" valign="bottom" | -40
+| width="47" align="center" valign="bottom" | -50
+| width="47" align="center" valign="bottom" | -60
+| width="47" align="center" valign="bottom" | -70
+|-
+| height="13" valign="bottom" | IM @ - ∆f
+|  valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" | -97
+| align="center" valign="bottom" | -111
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -
+|-
+| height="13" valign="bottom" | IM @ +∆f
+|  valign="bottom" | dBm
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" | -95
+| align="center" valign="bottom" | -107
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -
+|-
+|style="font-weight:bold" height="13" valign="bottom" | IM3DR
+|style="font-weight:bold"  valign="bottom" | dB
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" | 81
+|style="font-weight:bold" align="center" valign="bottom" | 89
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+|-
+| height="13"  valign="bottom" |
+|  valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+|}
+{| {{table}}
+| Preamp ON:    Noise Floor = -133dBm
 |-
-|'''IM3DR'''
-|'''dB'''
+|
-|90
-|102
-|94.5
-|'''96.5'''
-|
-|
-|
-|
-|
-|
 |}
-===20m: 14080kHz + 14100kHz===
+{| {{table}}
-'''Preamp OFF''':Noise Floor = -114dBm
+|-
-Inputs eachdBm-15-20-30-40-50-60-70
+| width="77" height="13" valign="bottom" | Inputs each
-IM @ - ∆fdBm-113------
+| width="47"  valign="bottom" | dBm
-IM @ +∆fdBm-114------
+| width="47" align="center" valign="bottom" | -21**
-'''IM3DRdB98.5'''
+| width="47" align="center" valign="bottom" | -25
+| width="47" align="center" valign="bottom" | -30
-'''Preamp ON''':Noise Floor = -134dBm
+| width="47" align="center" valign="bottom" | -35
-Inputs eachdBm-21**-25-30-35-40-50-60-70-80-90
+| width="47" align="center" valign="bottom" | -40
-IM @ - ∆fdBm-116-125-126-131------
+| width="47" align="center" valign="bottom" | -50
-IM @ +∆fdBm-112-125-123-134------
+| width="47" align="center" valign="bottom" | -60
-'''IM3DRdB'''9310094.5'''97.5'''
+| width="47" align="center" valign="bottom" | -70
+| width="47" align="center" valign="bottom" | -80
-===15m: 21080kHz + 21100kHz===
+| width="47" align="center" valign="bottom" | -90
-'''Preamp OFF''':Noise Floor = -114dBm
+|-
-Inputs eachdBm-15-20-30-40-50-60-70
+| height="13" valign="bottom" | IM @ - ∆f
-IM @ - ∆f-107-113*-114*-113*-113*-112*-
+|  valign="bottom" |
-IM @ +∆fdBm-106-114*-114*-114*-113*-112*-
+| align="center" valign="bottom" | -76
-'''IM3DRdB91.5'''93.58473.56352
+| align="center" valign="bottom" | -89
+| align="center" valign="bottom" | -104
-'''Preamp ON''':Noise Floor = -133dBm
+| align="center" valign="bottom" | -120
-Inputs eachdBm-21**-25-30-35-40-50-60-70-80-90
+| align="center" valign="bottom" | -131
-IM @ - ∆f-104-115-122-129-133*-133*-132*-132*-
+| align="center" valign="bottom" | -130*
-IM @ +∆fdBm-103-116-120-130-132*-131*-131*-
+| align="center" valign="bottom" | -132*
-'''IM3DRdB'''82.590.591'''94.5'''-9382.571.561.5
+| align="center" valign="bottom" | -132*
+| align="center" valign="bottom" | -
-===10m: 28080kHz + 28100kHz===
+| align="center" valign="bottom" | -
-'''Preamp OFF''':Noise Floor = -113dBm
+|-
-Inputs eachdBm-15-20-30-40-50-60-70
+| height="13" valign="bottom" | IM @ +∆f
-IM @ - ∆f-107-113*-113*-113*-111*-110*-
+|  valign="bottom" | dBm
-IM @ +∆fdBm-107-113*-113*-112*-111*-110*-
+| align="center" valign="bottom" | -75
-'''IM3DRdB92'''938372.561'''50'''
+| align="center" valign="bottom" | -88
+| align="center" valign="bottom" | -103
-'''Preamp ON''':Noise Floor = -134dBm
+| align="center" valign="bottom" | -118
-Inputs eachdBm-21**-25-30-35-40-50-60-70-80-90
+| align="center" valign="bottom" | -127
-IM @ - ∆f-96-108-120-131-131*-128*-128*-128*-128*-
+| align="center" valign="bottom" | -130*
-IM @ +∆fdBm-95-107-120-134-134*-131*-131*-129*-129*-
+| align="center" valign="bottom" | -132*
-'''IM3DRdB'''74.582.590'''97.5'''92.579.569.558.5'''48.5'''
+| align="center" valign="bottom" | -132*
+| align="center" valign="bottom" | -
-===6m: 49080kHz + 49100kHz===
+| align="center" valign="bottom" | -
-'''Preamp OFF''':Noise Floor = -113dBm
+|-
-Inputs eachdBm-15-20-30-40-50-60-70
+|style="font-weight:bold" height="13" valign="bottom" | IM3DR
-IM @ - ∆f-97-111-----
+|style="font-weight:bold"  valign="bottom" | dB
-IM @ +∆fdBm-95-107-----
+| align="center" valign="bottom" | 54.5
-'''IM3DRdB'''81'''89'''
+| align="center" valign="bottom" | 63.5
+| align="center" valign="bottom" | 73.5
-'''Preamp ON''':Noise Floor = -133dBm
+| align="center" valign="bottom" | 84
-Inputs eachdBm-21**-25-30-35-40-50-60-70-80-90
+|style="font-weight:bold" align="center" valign="bottom" | 89
-IM @ - ∆f-76-89-104-120-131-130*-132*-132*--
+| align="center" valign="bottom" | 80
-IM @ +∆fdBm-75-88-103-118-127-130*-132*-132*--
+| align="center" valign="bottom" | 72
-'''IM3DRdB'''54.563.573.584'''89'''807262
+| align="center" valign="bottom" | 62
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+|-
+|style="font-weight:bold" height="13" valign="bottom" |
+|style="font-weight:bold"  valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+|style="font-weight:bold" align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+|}
 == Effect of "Dither" and "Random" ==
@@ Line 393: / Line 1,843: @@
 IM3 signals 3db above the noise floor are considered MDS.
-===80m: 3680kHz + 3700kHz, Preamp OFF===
+{| {{table}}
-'''3.1Dither enabled, Random enabled''': Noise Floor = -115dBm
+| align="left" style="background:#f0f0f0;"|'''80m:  3680kHz + 3700kHz, Preamp OFF'''
-Inputs eachdBm-15-20-30-40-50-60-70
+|-
-IM @ - ∆fdBm-110-----112-
+|
-IM @ +∆fdBm-112-----112-
+|}
-'''IM3DRdB96'''52
+{| {{table}}
+|-
-'''3.2Dither enabled, '''''Random disabled'': Noise Floor = -115dBm
+|style="font-weight:bold" height="13" valign="bottom" | Dither enabled,
-Inputs eachdBm-15-20-30-40-50-60-70
+|style="font-weight:bold" valign="bottom" | Random enabled:
-IM @ - ∆fdBm-102-102-99-99-98-98-110
+| valign="bottom" | Noise Floor = -115dBm
-IM @ +∆fdBm-103-104-99-100-98-97-110
+|}
-'''IM3DRdB'''87.5836959.54837.5'''40'''
+{| {{table}}
+|-
-'''3.3'''''Dither disabled,''''' Random enabled''': Noise Floor -118dBm
+| width="77" height="13" valign="bottom" | Inputs each
-Inputs eachdBm-15-20-30-40-50-60-70
+| width="47"  valign="bottom" | dBm
-IM @ - ∆fdBm-106-110-98-102-112-113-
+| width="47" align="center" valign="bottom" |
-IM @ +∆fdBm-110-107-98-102-110-114-
+| width="47" align="center" valign="bottom" |
-'''IM3DRdB'''9388.5686261'''53.5'''
+| width="47" align="center" valign="bottom" |
+| width="47" align="center" valign="bottom" | -15
-'''3.4'''''Dither disabled, Random disabled'': Noise Floor = -118dBm
+| width="47" align="center" valign="bottom" | -20
-Inputs eachdBm-15-20-30-40-50-60-70
+| width="47" align="center" valign="bottom" | -30
-IM @ - ∆fdBm-101-105-94-97-100-113-116
+| width="47" align="center" valign="bottom" | -40
-IM @ +∆fdBm-104-106-95-97-101-114-116
+| width="47" align="center" valign="bottom" | -50
-'''IM3DRdB'''87.585.564.55750.5'''53.5'''46
+| width="47" align="center" valign="bottom" | -60
+| width="47" align="center" valign="bottom" | -70
-===20m: 14080kHz + 14100kHz, Preamp OFF===
+|-
-'''3.5Dither enabled, Random enabled''': Noise Floor -114dBm
+| height="13" valign="bottom" | IM @ - ∆f
-Inputs eachdBm-15-20-30-40-50-60-70
+|  valign="bottom" | dBm
-IM @ - ∆fdBm-113-----112-
+| align="center" valign="bottom" |
-IM @ +∆fdBm-114-----113-
+| align="center" valign="bottom" |
-'''IM3DRdB98.5'''52.5
+| align="center" valign="bottom" |
+| align="center" valign="bottom" | -110
-'''3.6Dither enabled, '''''Random disabled'': Noise Floor = -115dBm
+| align="center" valign="bottom" | -
-Inputs eachdBm-15-20-30-40-50-60-70
+| align="center" valign="bottom" | -
-IM @ - ∆fdBm-96-96-92-90-92-99-114
+| align="center" valign="bottom" | -
-IM @ +∆fdBm-98-97-95-92-93-100-114
+| align="center" valign="bottom" | -
-'''IM3DRdB'''8276.563.55142.5'''39.5'''44
+| align="center" valign="bottom" | -112
+| align="center" valign="bottom" | -
-'''3.7'''''Dither disabled,''''' Random enabled''': Noise Floor -117dBm
+|-
-Inputs eachdBm-15-20-30-40-50-60-70
+| height="13" valign="bottom" | IM @ +∆f
-IM @ - ∆fdBm-105-114-96-100-111-115-
+|  valign="bottom" | dBm
-IM @ +∆fdBm-108-111-97-99-110-114-
+| align="center" valign="bottom" |
-'''IM3DRdB'''91.592.566.559.5'''60.5'''54.5
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
-'''3.8'''''Dither disabled,''''' '''''Random disabled'': Noise Floor = -118dBm
+| align="center" valign="bottom" | -112
-Inputs eachdBm-15-20-30-40-50-60-70
+| align="center" valign="bottom" | -
-IM @ - ∆fdBm-97-94-91-91-95-100-116
+| align="center" valign="bottom" | -
-IM @ +∆fdBm-96-98-94-92-95-100-116
+| align="center" valign="bottom" | -
-'''IM3DRdB'''81.57662.551.545'''40'''46
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -112
+| align="center" valign="bottom" | -
+|-
+|style="font-weight:bold" height="13" valign="bottom" | IM3DR
+|style="font-weight:bold"  valign="bottom" | dB
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+|style="font-weight:bold" align="center" valign="bottom" | 96
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" | 52
+| align="center" valign="bottom" |
+|-
+|style="font-weight:bold" height="13" valign="bottom" |
+|  valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+|}
+{| {{table}}
+|-
+|style="font-weight:bold" height="13" valign="bottom" | Dither enabled,
+|style="font-style:Italic" valign="bottom" | Random disabled:
+| valign="bottom" | Noise Floor = -115dBm
+|}
+{| {{table}}
+|-
+| width="77" height="13" valign="bottom" | Inputs each
+| width="47"  valign="bottom" | dBm
+| width="47" align="center" valign="bottom" |
+| width="47" align="center" valign="bottom" |
+| width="47" align="center" valign="bottom" |
+| width="47" align="center" valign="bottom" | -15
+| width="47" align="center" valign="bottom" | -20
+| width="47" align="center" valign="bottom" | -30
+| width="47" align="center" valign="bottom" | -40
+| width="47" align="center" valign="bottom" | -50
+| width="47" align="center" valign="bottom" | -60
+| width="47" align="center" valign="bottom" | -70
+|-
+| height="13" valign="bottom" | IM @ - ∆f
+|  valign="bottom" | dBm
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" | -102
+| align="center" valign="bottom" | -102
+| align="center" valign="bottom" | -99
+| align="center" valign="bottom" | -99
+| align="center" valign="bottom" | -98
+| align="center" valign="bottom" | -98
+| align="center" valign="bottom" | -110
+|-
+| height="13" valign="bottom" | IM @ +∆f
+|  valign="bottom" | dBm
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" | -103
+| align="center" valign="bottom" | -104
+| align="center" valign="bottom" | -99
+| align="center" valign="bottom" | -100
+| align="center" valign="bottom" | -98
+| align="center" valign="bottom" | -97
+| align="center" valign="bottom" | -110
+|-
+|style="font-weight:bold" height="13" valign="bottom" | IM3DR
+|style="font-weight:bold"  valign="bottom" | dB
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" | 87.5
+| align="center" valign="bottom" | 83
+| align="center" valign="bottom" | 69
+| align="center" valign="bottom" | 59.5
+| align="center" valign="bottom" | 48
+| align="center" valign="bottom" | 37.5
+|style="font-weight:bold" align="center" valign="bottom" | 40
+|-
+|style="font-weight:bold" height="13" valign="bottom" |
+|  valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+|}
+{| {{table}}
+|-
+|style="font-style:Italic" height="13" valign="bottom" | Dither disabled,
+|style="font-weight:bold"  valign="bottom" | Random enabled:
+| valign="bottom" | Noise Floor = -118dBm
+|}
+{| {{table}}
+|-
+| width="77" height="13" valign="bottom" | Inputs each
+| width="47"  valign="bottom" | dBm
+| width="47" align="center" valign="bottom" |
+| width="47" align="center" valign="bottom" |
+| width="47" align="center" valign="bottom" |
+| width="47" align="center" valign="bottom" | -15
+| width="47" align="center" valign="bottom" | -20
+| width="47" align="center" valign="bottom" | -30
+| width="47" align="center" valign="bottom" | -40
+| width="47" align="center" valign="bottom" | -50
+| width="47" align="center" valign="bottom" | -60
+| width="47" align="center" valign="bottom" | -70
+|-
+| height="13" valign="bottom" | IM @ - ∆f
+|  valign="bottom" | dBm
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" | -106
+| align="center" valign="bottom" | -110
+| align="center" valign="bottom" | -98
+| align="center" valign="bottom" | -102
+| align="center" valign="bottom" | -112
+| align="center" valign="bottom" | -113
+| align="center" valign="bottom" | -
+|-
+| height="13" valign="bottom" | IM @ +∆f
+|  valign="bottom" | dBm
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" | -110
+| align="center" valign="bottom" | -107
+| align="center" valign="bottom" | -98
+| align="center" valign="bottom" | -102
+| align="center" valign="bottom" | -110
+| align="center" valign="bottom" | -114
+| align="center" valign="bottom" | -
+|-
+|style="font-weight:bold" height="13" valign="bottom" | IM3DR
+|style="font-weight:bold"  valign="bottom" | dB
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" | 93
+| align="center" valign="bottom" | 88.5
+| align="center" valign="bottom" | 68
+| align="center" valign="bottom" | 62
+| align="center" valign="bottom" | 61
+|style="font-weight:bold" align="center" valign="bottom" | 53.5
+| align="center" valign="bottom" |
+|-
+|style="font-weight:bold" height="13" valign="bottom" |
+|  valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+|}
+{| {{table}}
+|-
+|style="font-style:Italic" height="13" valign="bottom" | Dither disabled,
+|style="font-style:Italic" valign="bottom" | Random disabled:
+| valign="bottom" | Noise Floor = -118dBm
+|}
+{| {{table}}
+|-
+| width="77" height="13" valign="bottom" | Inputs each
+| width="47"  valign="bottom" | dBm
+| width="47" align="center" valign="bottom" |
+| width="47" align="center" valign="bottom" |
+| width="47" align="center" valign="bottom" |
+| width="47" align="center" valign="bottom" | -15
+| width="47" align="center" valign="bottom" | -20
+| width="47" align="center" valign="bottom" | -30
+| width="47" align="center" valign="bottom" | -40
+| width="47" align="center" valign="bottom" | -50
+| width="47" align="center" valign="bottom" | -60
+| width="47" align="center" valign="bottom" | -70
+|-
+| height="13" valign="bottom" | IM @ - ∆f
+|  valign="bottom" | dBm
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" | -101
+| align="center" valign="bottom" | -105
+| align="center" valign="bottom" | -94
+| align="center" valign="bottom" | -97
+| align="center" valign="bottom" | -100
+| align="center" valign="bottom" | -113
+| align="center" valign="bottom" | -116
+|-
+| height="13" valign="bottom" | IM @ +∆f
+|  valign="bottom" | dBm
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" | -104
+| align="center" valign="bottom" | -106
+| align="center" valign="bottom" | -95
+| align="center" valign="bottom" | -97
+| align="center" valign="bottom" | -101
+| align="center" valign="bottom" | -114
+| align="center" valign="bottom" | -116
+|-
+|style="font-weight:bold" height="13" valign="bottom" | IM3DR
+|style="font-weight:bold"  valign="bottom" | dB
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" | 87.5
+| align="center" valign="bottom" | 85.5
+| align="center" valign="bottom" | 64.5
+| align="center" valign="bottom" | 57
+| align="center" valign="bottom" | 50.5
+|style="font-weight:bold" align="center" valign="bottom" | 53.5
+| align="center" valign="bottom" | 46
+|-
+|style="font-weight:bold" height="13" valign="bottom" |
+|  valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+|}
+{| {{table}}
+| align="left" style="background:#f0f0f0;"|'''20m:  14080kHz + 14100kHz, Preamp OFF'''
+|-
+|
+|}
+{| {{table}}
+|-
+|style="font-weight:bold" height="13" valign="bottom" | Dither enabled,
+|style="font-weight:bold" valign="bottom" | Random enabled:
+| valign="bottom" | Noise Floor = -114dBm
+|}
+{| {{table}}
+|-
+| width="77" height="13" valign="bottom" | Inputs each
+| width="47"  valign="bottom" | dBm
+| width="47" align="center" valign="bottom" |
+| width="47" align="center" valign="bottom" |
+| width="47" align="center" valign="bottom" |
+| width="47" align="center" valign="bottom" | -15
+| width="47" align="center" valign="bottom" | -20
+| width="47" align="center" valign="bottom" | -30
+| width="47" align="center" valign="bottom" | -40
+| width="47" align="center" valign="bottom" | -50
+| width="47" align="center" valign="bottom" | -60
+| width="47" align="center" valign="bottom" | -70
+|-
+| height="13" valign="bottom" | IM @ - ∆f
+|  valign="bottom" | dBm
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" | -113
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -112
+| align="center" valign="bottom" | -
+|-
+| height="13" valign="bottom" | IM @ +∆f
+|  valign="bottom" | dBm
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" | -114
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -113
+| align="center" valign="bottom" | -
+|-
+|style="font-weight:bold" height="13" valign="bottom" | IM3DR
+|style="font-weight:bold"  valign="bottom" | dB
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+|style="font-weight:bold" align="center" valign="bottom" | 98.5
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" | 52.5
+| align="center" valign="bottom" |
+|-
+| height="13"  valign="bottom" |
+|  valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+|}
+{| {{table}}
+|-
+|style="font-weight:bold" height="13" valign="bottom" | Dither enabled,
+|style="font-style:Italic" valign="bottom" | Random disabled:
+| valign="bottom" | Noise Floor = -115dBm
+|}
+{| {{table}}
+|-
+| width="77" height="13" valign="bottom" | Inputs each
+| width="47"  valign="bottom" | dBm
+| width="47" align="center" valign="bottom" |
+| width="47" align="center" valign="bottom" |
+| width="47" align="center" valign="bottom" |
+| width="47" align="center" valign="bottom" | -15
+| width="47" align="center" valign="bottom" | -20
+| width="47" align="center" valign="bottom" | -30
+| width="47" align="center" valign="bottom" | -40
+| width="47" align="center" valign="bottom" | -50
+| width="47" align="center" valign="bottom" | -60
+| width="47" align="center" valign="bottom" | -70
+|-
+| height="13" valign="bottom" | IM @ - ∆f
+|  valign="bottom" | dBm
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" | -96
+| align="center" valign="bottom" | -96
+| align="center" valign="bottom" | -92
+| align="center" valign="bottom" | -90
+| align="center" valign="bottom" | -92
+| align="center" valign="bottom" | -99
+| align="center" valign="bottom" | -114
+|-
+| height="13" valign="bottom" | IM @ +∆f
+|  valign="bottom" | dBm
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" | -98
+| align="center" valign="bottom" | -97
+| align="center" valign="bottom" | -95
+| align="center" valign="bottom" | -92
+| align="center" valign="bottom" | -93
+| align="center" valign="bottom" | -100
+| align="center" valign="bottom" | -114
+|-
+|style="font-weight:bold" height="13" valign="bottom" | IM3DR
+|style="font-weight:bold"  valign="bottom" | dB
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" | 82
+| align="center" valign="bottom" | 76.5
+| align="center" valign="bottom" | 63.5
+| align="center" valign="bottom" | 51
+| align="center" valign="bottom" | 42.5
+|style="font-weight:bold" align="center" valign="bottom" | 39.5
+| align="center" valign="bottom" | 44
+|-
+|style="font-size:11pt" height="14"  valign="bottom" |
+|  valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+|}
+{| {{table}}
+|-
+|style="font-style:Italic" height="13" valign="bottom" | Dither disabled,
+|style="font-weight:bold"  valign="bottom" | Random enabled:
+| valign="bottom" | Noise Floor = -117dBm
+|}
+{| {{table}}
+|-
+| width="77" height="13" valign="bottom" | Inputs each
+| width="47"  valign="bottom" | dBm
+| width="47" align="center" valign="bottom" |
+| width="47" align="center" valign="bottom" |
+| width="47" align="center" valign="bottom" |
+| width="47" align="center" valign="bottom" | -15
+| width="47" align="center" valign="bottom" | -20
+| width="47" align="center" valign="bottom" | -30
+| width="47" align="center" valign="bottom" | -40
+| width="47" align="center" valign="bottom" | -50
+| width="47" align="center" valign="bottom" | -60
+| width="47" align="center" valign="bottom" | -70
+|-
+| height="13" valign="bottom" | IM @ - ∆f
+|  valign="bottom" | dBm
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" | -105
+| align="center" valign="bottom" | -114
+| align="center" valign="bottom" | -96
+| align="center" valign="bottom" | -100
+| align="center" valign="bottom" | -111
+| align="center" valign="bottom" | -115
+| align="center" valign="bottom" | -
+|-
+| height="13" valign="bottom" | IM @ +∆f
+|  valign="bottom" | dBm
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" | -108
+| align="center" valign="bottom" | -111
+| align="center" valign="bottom" | -97
+| align="center" valign="bottom" | -99
+| align="center" valign="bottom" | -110
+| align="center" valign="bottom" | -114
+| align="center" valign="bottom" | -
+|-
+|style="font-weight:bold" height="13" valign="bottom" | IM3DR
+|style="font-weight:bold"  valign="bottom" | dB
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" | 91.5
+| align="center" valign="bottom" | 92.5
+| align="center" valign="bottom" | 66.5
+| align="center" valign="bottom" | 59.5
+|style="font-weight:bold" align="center" valign="bottom" | 60.5
+| align="center" valign="bottom" | 54.5
+| align="center" valign="bottom" |
+|-
+|style="font-size:11pt" height="14"  valign="bottom" |
+|  valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+|}
+{| {{table}}
+|-
+|style="font-style:Italic" height="13" valign="bottom" | Dither disabled,
+|style="font-style:Italic" valign="bottom" | Random disabled:
+| valign="bottom" | Noise Floor = -118dBm
+|}
+{| {{table}}
+|-
+| width="77" height="13" valign="bottom" | Inputs each
+| width="47"  valign="bottom" | dBm
+| width="47" align="center" valign="bottom" |
+| width="47" align="center" valign="bottom" |
+| width="47" align="center" valign="bottom" |
+| width="47" align="center" valign="bottom" | -15
+| width="47" align="center" valign="bottom" | -20
+| width="47" align="center" valign="bottom" | -30
+| width="47" align="center" valign="bottom" | -40
+| width="47" align="center" valign="bottom" | -50
+| width="47" align="center" valign="bottom" | -60
+| width="47" align="center" valign="bottom" | -70
+|-
+| height="13" valign="bottom" | IM @ - ∆f
+|  valign="bottom" | dBm
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" | -97
+| align="center" valign="bottom" | -94
+| align="center" valign="bottom" | -91
+| align="center" valign="bottom" | -91
+| align="center" valign="bottom" | -95
+| align="center" valign="bottom" | -100
+| align="center" valign="bottom" | -116
+|-
+| height="13" valign="bottom" | IM @ +∆f
+|  valign="bottom" | dBm
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" | -96
+| align="center" valign="bottom" | -98
+| align="center" valign="bottom" | -94
+| align="center" valign="bottom" | -92
+| align="center" valign="bottom" | -95
+| align="center" valign="bottom" | -100
+| align="center" valign="bottom" | -116
+|-
+|style="font-weight:bold" height="13" valign="bottom" | IM3DR
+|style="font-weight:bold"  valign="bottom" | dB
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" | 81.5
+| align="center" valign="bottom" | 76
+| align="center" valign="bottom" | 62.5
+| align="center" valign="bottom" | 51.5
+| align="center" valign="bottom" | 45
+|style="font-weight:bold" align="center" valign="bottom" | 40
+| align="center" valign="bottom" | 46
+|-
+|style="font-weight:bold" height="13" valign="bottom" |
+|style="font-weight:bold"  valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+|style="font-weight:bold" align="center" valign="bottom" |
+| align="center" valign="bottom" |
+|}
 == MERCURY IM3DR with a third signal present ==
-(May/June / HB9AJG)
+(May/June 2009/ HB9AJG)
 In his presentation on the design of MERCURY at the ARRL/TAPR Conference on Digital Communications 2008 Phil Harman explains that other strong signals have the same effect as "Dither enabled". To verify this, a second coupler and a third signal generator were added to the Test Setup:
@@ Line 492: / Line 3,039: @@
 ''"Dither" and "Random" were disabled'', and the measurements on '''20m''' were repeated:
+<!-- Begin table 5a -->
-'''Preamp OFF''':Noise Floor = -''118dBm''
+{| {{table}}
-Inputs eachdBm&nbsp;-15-20-30-40-50-60-70
+| align="left" style="background:#f0f0f0;"|'''20m:  14080kHz + 14100kHz'''
-IM @ - ∆fdBm&nbsp;-97-94-91-91-95-100-116
+|-
-IM @ +∆fdBm&nbsp;-96-98-94-92-95-100-116
+| style="font-style:Italic" valign="bottom" | Random disabled and Dither disabled
-'''IM3DRdB40'''46
+|-
-'''Third signal -52dBm*'''
+| Preamp OFF:    Noise Floor = -118dBm
-IM @ - ∆fdBm&nbsp;-94-91-92-100-114*-
+|}
-IM @ +∆fdBm&nbsp;-98-94-92-100-114*-
+{| {{table}}
-'''Third signal -47dBm*'''
+| width="77" height="13" valign="bottom" | Inputs each
-IM @ - ∆fdBm&nbsp;-94-92-93-114*--
+| width="47"  valign="bottom" | dBm
-IM @ +∆fdBm&nbsp;-98-93-94-114*--
+| width="47" valign="bottom" |
-'''Third signal -14dBm*'''
+| width="47"  valign="bottom" |
-IM @ - ∆fdBm&nbsp;-112-112-114*---
+| width="47"  valign="bottom" |
-IM @ +∆fdBm&nbsp;-112-112-114*---
+| width="47" align="center" valign="bottom" | -15
-'''IM3DRdB74'''
+| width="47" align="center" valign="bottom" | -20
+| width="47" align="center" valign="bottom" | -30
+| width="47" align="center" valign="bottom" | -40
+| width="47" align="center" valign="bottom" | -50
+| width="47" align="center" valign="bottom" | -60
+| width="47" align="center" valign="bottom" | -70
+|-
+|-
+|style="font-weight:bold" height="6" valign="bottom" |
+|style="font-weight:bold"  valign="bottom" |
+|  valign="bottom" |
+|  valign="bottom" |
+|  valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+|style="font-weight:bold" align="center" valign="bottom" |
+| align="center" valign="bottom" |
+|-
+|}
+{| {{table}}
+| style="font-weight:bold" valign="bottom" height="13" | No third signal
+|}
+{| {{table}}
+|-
+| width="77" height="13" valign="bottom" | IM @ - ∆f
+| width="57"  valign="bottom" | dBm
+| width="35" valign="bottom" |
+| width="47"  valign="bottom" |
+| width="47"  valign="bottom" |
+| width="47" align="center" valign="bottom" | -97
+| width="47" align="center" valign="bottom" | -94
+| width="47" align="center" valign="bottom" | -91
+| width="47" align="center" valign="bottom" | -91
+| width="47" align="center" valign="bottom" | -95
+| width="47" align="center" valign="bottom" | -100
+| width="47" align="center" valign="bottom" | -116
+|-
+| height="13" valign="bottom" | IM @ +∆f
+|  valign="bottom" | dBm
+| valign="bottom" |
+|  valign="bottom" |
+|  valign="bottom" |
+| align="center" valign="bottom" | -96
+| align="center" valign="bottom" | -98
+| align="center" valign="bottom" | -94
+| align="center" valign="bottom" | -92
+| align="center" valign="bottom" | -95
+| align="center" valign="bottom" | -100
+| align="center" valign="bottom" | -116
+|-
+|style="font-weight:bold" height="13" valign="bottom" | IM3DR
+|style="font-weight:bold"  valign="bottom" | dB
+|  valign="bottom" |
+|  valign="bottom" |
+|  valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+|style="font-weight:bold" align="center" valign="bottom" | 40
+| align="center" valign="bottom" | 46
+|-
+|style="font-weight:bold" height="6" valign="bottom" |
+|style="font-weight:bold"  valign="bottom" |
+|  valign="bottom" |
+|  valign="bottom" |
+|  valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+|style="font-weight:bold" align="center" valign="bottom" |
+| align="center" valign="bottom" |
+|-
+|style="font-weight:bold" height="13" valign="bottom" | Third signal
+|style="font-weight:bold"  valign="bottom" | -52dBm*
+|  valign="bottom" |
+|  valign="bottom" |
+|  valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+|-
+| height="13" valign="bottom" | IM @ - ∆f
+|  valign="bottom" | dBm
+| valign="bottom" |
+|  valign="bottom" |
+|  valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" | -94
+| align="center" valign="bottom" | -91
+| align="center" valign="bottom" | -92
+| align="center" valign="bottom" | -100
+| align="center" valign="bottom" | -114
+| align="center" valign="bottom" | -
+|-
+| height="13" valign="bottom" | IM @ +∆f
+|  valign="bottom" | dBm
+| valign="bottom" |
+|  valign="bottom" |
+|  valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" | -98
+| align="center" valign="bottom" | -94
+| align="center" valign="bottom" | -92
+| align="center" valign="bottom" | -100
+| align="center" valign="bottom" | -114
+| align="center" valign="bottom" | -
+|-
+|style="font-weight:bold" height="13" valign="bottom" | IM3DR
+|style="font-weight:bold"  valign="bottom" | dB
+|  valign="bottom" |
+|  valign="bottom" |
+|  valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+|style="font-weight:bold" align="center" valign="bottom" | 50
+| align="center" valign="bottom" | 54
+| align="center" valign="bottom" |
+|- style="font-size:6pt"
+|style="font-weight:bold" height="8" valign="bottom" |
+|style="font-weight:bold"  valign="bottom" |
+|  valign="bottom" |
+|  valign="bottom" |
+|  valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+|style="font-weight:bold" align="center" valign="bottom" |
+| align="center" valign="bottom" |
+|-
+|style="font-weight:bold" height="13" valign="bottom" | Third signal
+|style="font-weight:bold"  valign="bottom" | -47dBm*
+|  valign="bottom" |
+|  valign="bottom" |
+|  valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+|-
+| height="13" valign="bottom" | IM @ - ∆f
+|  valign="bottom" | dBm
+| valign="bottom" |
+|  valign="bottom" |
+|  valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" | -94
+| align="center" valign="bottom" | -92
+| align="center" valign="bottom" | -93
+| align="center" valign="bottom" | -114
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -
+|-
+| height="13" valign="bottom" | IM @ +∆f
+|  valign="bottom" | dBm
+| valign="bottom" |
+|  valign="bottom" |
+|  valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" | -98
+| align="center" valign="bottom" | -93
+| align="center" valign="bottom" | -94
+| align="center" valign="bottom" | -114
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -
+|-
+|style="font-weight:bold" height="13" valign="bottom" | IM3DR
+|style="font-weight:bold"  valign="bottom" | dB
+|  valign="bottom" |
+|  valign="bottom" |
+|  valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+|style="font-weight:bold" align="center" valign="bottom" | 53
+| align="center" valign="bottom" | 64
+|style="font-weight:bold" align="center" valign="bottom" |
+| align="center" valign="bottom" |
+|-
+|style="font-weight:bold" height="6" valign="bottom" |
+|style="font-weight:bold"  valign="bottom" |
+|  valign="bottom" |
+|  valign="bottom" |
+|  valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+|style="font-weight:bold" align="center" valign="bottom" |
+| align="center" valign="bottom" |
+|-
+|style="font-weight:bold" height="13" valign="bottom" | Third signal
+|style="font-weight:bold"  valign="bottom" | -14dBm*
+|  valign="bottom" |
+|  valign="bottom" |
+|  valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+|-
+| height="13" valign="bottom" | IM @ - ∆f
+|  valign="bottom" | dBm
+| valign="bottom" |
+|  valign="bottom" |
+|  valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" | -112
+| align="center" valign="bottom" | -112
+| align="center" valign="bottom" | -114
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -
+|-
+| height="13" valign="bottom" | IM @ +∆f
+|  valign="bottom" | dBm
+| valign="bottom" |
+|  valign="bottom" |
+|  valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" | -112
+| align="center" valign="bottom" | -112
+| align="center" valign="bottom" | -114
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -
+|-
+|style="font-weight:bold" height="13" valign="bottom" | IM3DR
+|style="font-weight:bold"  valign="bottom" | dB
+|  valign="bottom" |
+|  valign="bottom" |
+|  valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+|style="font-weight:bold" align="center" valign="bottom" | 82
+| align="center" valign="bottom" | 74
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+|}
+<!-- End table 5a -->
 '''Frequency of the third signal:''' anywhere between 1 and 30MHz (except harmonics and IMs)
-'''Approximate signal level, the limit is fuzzy: at levels up to about 10dB higher IM signals vary between nil and MDS
+'''*Approximate signal level, the limit is fuzzy: at levels up to about 10dB higher IM signals vary between nil and MDS
 With very strong third signals (S9+60dB), an improvement of the IM3DR of approximately 30db is achieved.
-However, this is not as much as with "Dither" ''and'' "Random" enabled (copy from page 2):
+However, this is not as much as with "Dither" ''and'' "Random" enabled (copy from above):
-'''Preamp OFF''':Noise Floor = -''114dBm''
+{| {{table}}
-Inputs eachdBm-15-20-30-40-50-60-70
+| align="left" style="background:#f0f0f0;"|'''20m:  14080kHz + 14100kHz'''
-IM @ - ∆fdBm-113------
+|-
-IM @ +∆fdBm-114------
+|style="font-style:Italic" valign="bottom" | Random enabled and Dither enabled
-'''IM3DRdB98.5'''
+|-
+| Preamp OFF:    Noise Floor = -114dBm
-'''Now, of course, the next step was to connect my DX-88 8-band trap vertical instead of the third signal generator '''(no filters between antenna and Mercury):
+|}
-'''BandPreampNoise floor UTCmax gen levelCommentIM3DR'''
+{| {{table}}
-'''for IM3 <MDS'''
+|-
-mOFF-114dBm15:30-50 dBmvaries slightly with time64dB
+| width="77" height="13" valign="bottom" | Inputs each
-ON-115-41(fading effects?)74
+| width="47"  valign="bottom" | dBm
-mOFF-108dBm16:00-40 dBmvaries slightly68
+| width="47" align="center" valign="bottom" |
-ON-108-2484
+| width="47" align="center" valign="bottom" |
-mOFF-97dBm16:10-34 dBmvaries slightly63
+| width="47" align="center" valign="bottom" |
-ON-97-22just before ADC Overload!75
+| width="47" align="center" valign="bottom" | -15
-mOFF-114dBm16:20-46 dBmvaries by several dB68
+| width="47" align="center" valign="bottom" | -20
-ON-116-4076
+| width="47" align="center" valign="bottom" | -30
-mOFF-116dBm16:30-47 dBmvaries by several dB69
+| width="47" align="center" valign="bottom" | -40
-ON-123-4578
+| width="47" align="center" valign="bottom" | -50
-mOFF-118dBm16:40-46 dBmvaries slightly72
+| width="47" align="center" valign="bottom" | -60
-ON-136-5086
+| width="47" align="center" valign="bottom" | -70
+|-
+| height="13" valign="bottom" | IM @ - ∆f
+|  valign="bottom" | dBm
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" | -113
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -
+|-
+| height="13" valign="bottom" | IM @ +∆f
+|  valign="bottom" | dBm
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" | -114
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -
+| align="center" valign="bottom" | -
+|-
+|style="font-weight:bold" height="13" valign="bottom" | IM3DR
+|style="font-weight:bold"  valign="bottom" | dB
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+|style="font-weight:bold" align="center" valign="bottom" | 98.5
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+|-
+| height="13"  valign="bottom" |
+|  valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+| align="center" valign="bottom" |
+|}
+'''Now, of course, the next step was to connect my DX-88 8-band trap vertical instead of the third signal generator '''(no filters between antenna and Mercury):
+<!-- Begin table 5c -->
+{| {{table}}
+|style="font-style:Italic" valign="bottom" | Random disabled and Dither disabled
+|}
+{| {{table}}
+|- style="font-size:9pt;font-weight:bold" align="center" valign="top" style="background:#f0f0f0"
+| width="42" height="24" | Band
+| width="53" | Preamp
+| width="64" | Noise floor
+| width="42" | UTC
+| width="85" | max gen level<br />for IM3 < MDS
+| width="146" | Comment
+| width="47" | IM3DR
+|-  align="center" valign="bottom"
+| height="13" | 20m
+| OFF
+| -114dBm
+| 15:30
+| -50 dBm
+| varies slightly with time
+| 64dB
+|-  align="center" valign="bottom"
+| height="13" |
+| ON
+| -115dBm
+|
+| -41dBm
+| (fading effects?)
+| 74dB
+|-  align="center" valign="bottom"
+| height="13" |
+|
+|
+|
+|
+|
+|
+|-  align="center" valign="bottom"
+| height="13" | 40m
+| OFF
+| -108dBm
+| 16:0
+| -40 dBm
+| varies slightly
+| 68dB
+|-  align="center" valign="bottom"
+| height="13" |
+| ON
+| -108dBm
+|
+| -24dBm
+|
+| 84dB
+|-  align="center" valign="bottom"
+| height="13" |
+|
+|
+|
+|
+|
+|
+|-  align="center" valign="bottom"
+| height="13" | 80m
+| OFF
+| -97dBm
+| 16:10
+| -34 dBm
+| varies slightly
+| 63dB
+|-  align="center" valign="bottom"
+| height="13" |
+| ON
+| -97dBm
+|
+| -22dBm
+| just before ADC Overload!
+| 75dB
+|-  align="center" valign="bottom"
+| height="13" |
+|
+|
+|
+|
+|
+|
+|-  align="center" valign="bottom"
+| height="13" | 15m
+| OFF
+| -114dBm
+| 16:20
+| -46 dBm
+| varies by several dB
+| 68dB
+|-  align="center" valign="bottom"
+| height="13" |
+| ON
+| -116dBm
+|
+| -40dBm
+|
+| 76dB
+|-  align="center" valign="bottom"
+| height="13" |
+|
+|
+|
+|
+|
+|
+|-  align="center" valign="bottom"
+| height="13" | 10m
+| OFF
+| -116dBm
+| 16:30
+| -47 dBm
+| varies by several dB
+| 69dB
+|-  align="center" valign="bottom"
+| height="13" |
+| ON
+| -123dBm
+|
+| -45dBm
+|
+| 78dB
+|-  align="center" valign="bottom"
+| height="13" |
+|
+|
+|
+|
+|
+|
+|-  align="center" valign="bottom"
+| height="13" |  6m
+| OFF
+| -118dBm
+| 16:40
+| -46 dBm
+| varies slightly
+| 72dB
+|-  align="center" valign="bottom"
+| height="13" |
+| ON
+| -136dBm
+|
+| -50dBm
+|
+| 86dB
+|-
+|style="font-weight:bold" height="13" valign="bottom" |
+|style="font-weight:bold" valign="bottom" |
+|  valign="bottom" |
+|  valign="bottom" |
+|  valign="bottom" |
+|  valign="bottom" |
+|  valign="bottom" |
+|}
+<!-- End table 5c -->
 ==CONCLUSION==
 The antenna has about the same effect as a third signal generator. Enabling "Dither" and "Random" results in a much higher IM3DR, however. Therefore, I think if a band is heavily congested, it is preferable to enable "Dither" and "Random" and to accept the degradation of sensitivity of 4dB.'''
+[[Category:Mercury]]

Difference between revisions of "Mercury - intermodulation (IMD) tests"

Latest revision as of 10:45, 25 January 2010

Contents

Test Introduction

Test Setup

MERCURY 3rd Order Intermodulation Free Dynamic Range IM3DR

Effect of "Dither" and "Random"

MERCURY IM3DR with a third signal present

CONCLUSION

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MERCURY 3^rd Order Intermodulation Free Dynamic Range IM3DR