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[Xylo-SDR] Missing messages

It was interesting that when I sent my test message at 9:50 a.m., it
triggered the digest being sent out.  It also appears that the digest
contains all messages sent to the list, even when it was down between
Thursday and this morning, but the archives do not.

So for the record, and the catch everyone up, I've edited the digest so
that messages I don't think got through are now reproduced here.

Don AE5K

-------- Digest Vol. 3, Number 3 --------

Today's Topics:  (edited immensely!)

  18. Re: Signal Integrity and Board stackup issues (Ray Anderson)
  19. Re: Help Wanted: ATX 20 or 24 pin PCB	mountconnectorwanted
      (Eric Ellison)
  20. Re: small and portable (Christopher T. Day)
  21. Re: Quartus upgrade (Christopher T. Day)
  22. A/D input circuit (Phil Harman)
  23. Test only (Don AE5K)
  24. Lionheart board (Leon Heller)
  25. Another admin test (Don AE5K)
  26. Flex Radio Forum Audio - Focus SVN for Programmers (Eric Ellison)
  27. Mighty Quiet in Here (Eric Ellison)


Message: 18
Date: Thu, 2 Feb 2006 14:55:01 -0800
From: "Ray Anderson" <ray.anderson@xilinx.com>
Subject: Re: [Xylo-SDR] Signal Integrity and Board stackup issues

Eric wrote:

>Sorry that I did not reply to this earlier, but I did NOT forget.
>thank you for your contribution. To my way of thinking, this project
>on the Atlas - 4 layer board we are designing (by expense and loose
>agreement). It is the road that other project boards will travel. Also
>other FPGA boards can use the Atlas to work. I think that Bill - KD5TFD
>recognized it when he named it! Your obvious design expertise is needed
>in our 'amateur' effort, and would benefit us all. 

>In my gross design suggestion I did suggest a 'socket' for termination
>now extends to linked Atlas boards (just move the resistor pack.).
>we first need to design the board before we can design which lines to
>terminate. As you point out, the I2C speed won't have to be terminated,
>we would like some high speed tracks to go over this board. 
>I think we have agreed that we are not looking at ultra high speeds, or
>powers be switched on the Atlas. However it will be a minimum of 4
>If you would volunteer to be project leader on this design team, I'll
>promise to get this board produced! I will try to post a Visio of the
>design we are talking about on Dale's SVN. We can go from there.



Don't worry about the delay. I was out horizontal for about 5 days with
the flu and am just starting to get caught up on stuff.

I'll sign on as the SI/PCB guy for the Atlas board. After I've had a
chance to look over the design as it is now envisioned we can start
discussion specifics. Looking at the various docs that were available
last week gave me a pretty good idea of what's going to be involved, but
here were a lot of unknowns and TBD's at that time.

I guess I'll have to install a svn client on my system so I can access
all the new docs.

 Ray   WB6TPU

Message: 19
Date: Thu, 2 Feb 2006 19:06:16 -0500
From: "Eric Ellison" <ecellison@comcast.net>
Subject: Re: [Xylo-SDR] Help Wanted: ATX 20 or 24 pin PCB


You DA MAN! I looked at about 4 motherboards and could not see any part
number markings.

Wonder If they have the newer 24 pin part.

Thanks for the contribution!


-----Original Message-----

The 20-pin header specified in the ATX spec rev 2.1 is in the Mouser
catalog as Part # 538-39-29-9202 @ $1.39.


Message: 20
Date: Thu, 2 Feb 2006 16:45:27 -0800
From: "Christopher T. Day" <CTDay@lbl.gov>
Subject: Re: [Xylo-SDR] small and portable

Mine just arrived - too cute to pass up. Also arrived, the 12V switching
regulated power brick to feed it. 3 Molex ATX PCB headers on order from
Mouser to give it a home.


-----Original Message-----
From: Mike Naruta [mailto:mnaruta@comcast.net]

Wow, a guy can't even lurk anymore.    (smile)
They even have a pdf of the manual.
Here it is:



World's tiniest 12V DC-DC ATX power supply unit (PSU)

Unfortunately, it wants 12 Volts regulated and will shut down at 13

Mike  -  AA8K


Message: 21
Date: Thu, 2 Feb 2006 16:47:22 -0800
From: "Christopher T. Day" <CTDay@lbl.gov>
Subject: Re: [Xylo-SDR] Quartus upgrade

Also note the Nios evaluation download. Nios is a series of three CPU
cores for Altera FPGA's. The smallest one takes less than half the
Cyclone on the Xylo board.



Message: 22
Date: Fri, 3 Feb 2006 20:28:49 +0800
From: "Phil Harman" <pvharman@arach.net.au>
Subject: [Xylo-SDR] A/D input circuit

I've built a CAD model of a possible input circuit for the A/D converter
(be it Wolfson/TI/Cypress or whatever).


and SVN ( OK Eric!)

Since all the A/D converters we are considering have differential inputs
the to make the most of this we need a single ended to differential
converter (until we have a mixer that can use a differential input

It's lifted directly from Leif SM5BSZ Linrad work and comes highly
Any alternatives and recommendations as to suitable opamps etc would be
appreciated before I model the noise performance etc.

73's  Phil....VK6APH


Message: 23
Date: Fri, 03 Feb 2006 11:37:19 -0600
From: Don AE5K <don@ae5k.us>
Subject: [Xylo-SDR] Test only

Test only.  Do not reply.  May have problem with reflector.

Don AE5K
List Administrator


Message: 24
Date: Fri, 3 Feb 2006 19:59:10 -0000
From: "Leon Heller" <leon.heller@bulldoghome.com>
Subject: [Xylo-SDR] Lionheart board

I've been seeing how far I can push my kitchen sink PCB processing over
the last couple of days. I can reliably manage 8/8 design rules (8 mil
tracks with 8 mil spacing) and footprints for parts like the Philips
LPC2106 ARM controller with 0.5 mm spacing leads. This is for my 'day
job', designing a sports training aid. The ARM board is for a
pocket-sized processing/display system communicating with a head-mounted
unit using a MEMS accelerometer, MSP430F1232 MCU and nRF2401A wireless chip.

I will try making a prototype of a very basic FPGA system comprising the
Cyclone II, EPCS1 and FX2LP, with a JTAG connector, just to prove to
myself that the configuration system we are using works OK. It'll cost
next to nothing apart from a little time.

I print artwork onto Premium JetStar film using my old Epson Stylus
Photo 870 printer, followed by UV exposure onto FPC-16 PCB material. I
then develop in NaOH and etch in hot FeCl3 with continuous agitation by

73, Leon
Leon Heller, G1HSM


Message: 25


Message: 26
Date: Fri, 3 Feb 2006 23:55:52 -0500
From: "Eric Ellison" <ecellison@comcast.net>
Subject: [Xylo-SDR] Flex Radio Forum Audio - Focus SVN for Programmers

Folks here is the summary of the forum audio for 2-4-2006





Message: 27
Date: Sun, 5 Feb 2006 05:53:20 -0500
From: "Eric Ellison" <ecellison@comcast.net>
Subject: [Xylo-SDR] Mighty Quiet in Here


We up and running?