Difference between revisions of "DEMETER"

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Line 17: Line 17:
  
 
'''Input'''
 
'''Input'''
13.8 Volt DC (always 13.8 V or is there a supply range, see remark below)
+
  13.8 Volt DC (always 13.8 V or is there a supply range, see remark below)
110 Vac (mains)
+
  110 Vac (mains)
230 Vac (mains)
+
  230 Vac (mains)
Battery (13.8Volt) input with automatic switchover
+
  Battery (13.8Volt) input with automatic switchover
 
'''
 
'''
 
Input connector'''
 
Input connector'''
Powerpole connector for DC 13.8 Volt
+
  Powerpole connector for DC 13.8 Volt
Mains connector: National standard
+
  Mains connector: National standard
 
'''
 
'''
 
Output voltages'''
 
Output voltages'''
Remote switchable voltages
+
  Remote switchable voltages
+5 Volt @ …. Amps
+
  +5 Volt @ …. Amps
+ 12 Volt @ ….. Amps
+
  + 12 Volt @ ….. Amps
-12 Volt @ ….. Amps
+
  -12 Volt @ ….. Amps
 
'''
 
'''
 
Standby supply (for GPS-engine and OCXO)'''
 
Standby supply (for GPS-engine and OCXO)'''
Constant on
+
  Constant on
+ 5 Volt
+
  + 5 Volt
+ 15 Volt
+
  + 15 Volt
+ 24 Volt (depends on OCXO used, if possible user definable/adjustable)
+
  + 24 Volt (depends on OCXO used, if possible user definable/adjustable)
  
 
'''Output connector'''
 
'''Output connector'''
ATX-connector
+
  ATX-connector
DIN 41612 (Atlas connectors)
+
  DIN 41612 (Atlas connectors)
 
'''
 
'''
 
Protection'''
 
Protection'''
Input protection (high/low voltage, polarity)
+
  Input protection (high/low voltage, polarity)
Output protection (current limiting, voltage crowbar)
+
  Output protection (current limiting, voltage crowbar)
  
 
'''Monitoring'''
 
'''Monitoring'''
· Input voltage
+
  · Input voltage
· Output voltage
+
  · Output voltage
· Output currents
+
  · Output currents
· Temperature
+
  · Temperature
  
 
'''Power supply communication'''
 
'''Power supply communication'''
Atlas backplane
+
  Atlas backplane
USB-bus
+
  USB-bus
1 wire interface (controlled by a board on Atlas)
+
  1 wire interface (controlled by a board on Atlas)
Dumb-interface using the pins T7 and T8 on the Atlas
+
  Dumb-interface using the pins T7 and T8 on the Atlas
  
 
'''Connection to the HPSDR'''
 
'''Connection to the HPSDR'''
Using the ATX power connector, communication via the USB bus
+
  Using the ATX power connector, communication via the USB bus
Using the DIN41612 connector using the Atlas backplane for communication
+
  Using the DIN41612 connector using the Atlas backplane for communication
  
 
'''Position of the power supply'''
 
'''Position of the power supply'''
On the Atlas backplane
+
  On the Atlas backplane
In a separate box (outside/inside Pandora)
+
  In a separate box (outside/inside Pandora)
  
 
'''HPSDR configuration'''
 
'''HPSDR configuration'''
Ozymandias - interface module
+
  Ozymandias - interface module
Mercury – receiver (5V @ 500mA, 12V @ 200mA, -12V not used)
+
  Mercury – receiver (5V @ 500mA, 12V @ 200mA, -12V not used)
Penelope – transmitter (5V @ 300mA, 12V @ 200mA, -12V not used))
+
  Penelope – transmitter (5V @ 300mA, 12V @ 200mA, -12V not used))
Alexiares - RF Bandpass Filters
+
  Alexiares - RF Bandpass Filters
Gibraltar - frequency standard
+
  Gibraltar - frequency standard
Epimetheus - antenna and other switching
+
  Epimetheus - antenna and other switching
  
Measured: Ozy + Janus: +12v @ 200mA, +5v @ 180 ma, -12v @ 70 ma
+
  Measured: Ozy + Janus: +12v @ 200mA, +5v @ 180 ma, -12v @ 70 ma
  
 
'''Questions/remarks'''
 
'''Questions/remarks'''
Switching or Lineair?
+
  Switching or Lineair?
Internal/External?
+
  Internal/External?
Power dissipation (Convection cooling/ forced air-cooling)?
+
  Power dissipation (Convection cooling/ forced air-cooling)?
Do we need computer monitoring of voltages and currents?
+
  Do we need computer monitoring of voltages and currents?
Include an USB-HUB (use one of the ports for the power supply communication)?
+
  Include an USB-HUB (use one of the ports for the power supply communication)?
Configuration (to use or not to use the SDR-1000)? People who use it in combination with the SDR-1000 need less power from the power-supply and are using a custom built supply or the SRD-1000 power supply.
+
  Configuration (to use or not to use the SDR-1000)? People who use it in combination with the         SDR-1000 need less power from the power-supply and are using a custom built supply or the SRD-1000 power supply.
Will the 13.8Volt really be 13.8Volt or “something” between 11.0 Volt and 15 Volt? With other words: How many people are going to use the HPSDR mobile?
+
  Will the 13.8Volt really be 13.8Volt or “something” between 11.0 Volt and 15 Volt? With other words: How many people are going to use the HPSDR mobile?
  
Linear (A “lot of heat”, not “green”, easy to construct and trouble-shoot)
+
  Linear (A “lot of heat”, not “green”, easy to construct and trouble-shoot)
  
Switching (Less heat, more “green”, more noise, more difficult to construct)
+
  Switching (Less heat, more “green”, more noise, more difficult to construct)
  
Transformers:
+
  Transformers:
From my opinion there will always be a normal mains-transformer, both in the switching and the linear power supply option. Building a switcher for 110Vac/230Vac is too dangereous and complicated (safety regulations) for (less experienced) home-builders. The switcher will be situated in the low-voltage part.
+
  From my opinion there will always be a normal mains-transformer, both in the switching and the   linear power supply option. Building a switcher for 110Vac/230Vac is too dangereous and complicated (safety regulations) for (less experienced) home-builders. The switcher will be situated in the low-voltage part.

Revision as of 03:34, 11 June 2007

Demeter

Project Leader: Jeroen, PE1RGE

"Demeter" is the project-name for the HPSDR power supply. Allthough power supplies are widely available, Demeter will be specifically designed for the HPSDR project.

At this moment, 11th of June 2007, an inventory of wishes, specifiactions and ideas is made for the HPSDR-power supply. If you have any ideas, questions or suggestions, please feel free to E-mail me.

Further information will be presented on this page when it becomes available.

73 Jeroen PE1RGE


First result of the discussion on the HPSDR mailing-list (11th June 2007):

DEMETER SPECIFICATIONS

Input

 13.8 Volt DC (always 13.8 V or is there a supply range, see remark below)
 110 Vac (mains)
 230 Vac (mains)
 Battery (13.8Volt) input with automatic switchover

Input connector

 Powerpole connector for DC 13.8 Volt
 Mains connector: National standard

Output voltages

 Remote switchable voltages
 +5 Volt @ …. Amps
 + 12 Volt @ ….. Amps
 -12 Volt @ ….. Amps

Standby supply (for GPS-engine and OCXO)

 Constant on
 + 5 Volt
 + 15 Volt
 + 24 Volt (depends on OCXO used, if possible user definable/adjustable)

Output connector

 ATX-connector
 DIN 41612 (Atlas connectors)

Protection

 Input protection (high/low voltage, polarity)
 Output protection (current limiting, voltage crowbar)

Monitoring

 ·	Input voltage
 ·	Output voltage
 ·	Output currents
 ·	Temperature

Power supply communication

 Atlas backplane
 USB-bus
 1 wire interface (controlled by a board on Atlas)
 Dumb-interface using the pins T7 and T8 on the Atlas

Connection to the HPSDR

 Using the ATX power connector, communication via the USB bus
 Using the DIN41612 connector using the Atlas backplane for communication

Position of the power supply

 On the Atlas backplane
 In a separate box (outside/inside Pandora)

HPSDR configuration

 Ozymandias - interface module
 Mercury – receiver (5V @ 500mA, 12V @ 200mA, -12V not used)
 Penelope – transmitter (5V @ 300mA, 12V @ 200mA, -12V not used))
 Alexiares - RF Bandpass Filters
 Gibraltar - frequency standard
 Epimetheus - antenna and other switching
 Measured: Ozy + Janus: +12v @ 200mA, +5v @ 180 ma, -12v @ 70 ma

Questions/remarks

 Switching or Lineair?
 Internal/External?
 Power dissipation (Convection cooling/ forced air-cooling)?
 Do we need computer monitoring of voltages and currents?
 Include an USB-HUB (use one of the ports for the power supply communication)?
 Configuration (to use or not to use the SDR-1000)? People who use it in combination with the         SDR-1000 need less power from the power-supply and are using a custom built supply or the SRD-1000 power supply.
 Will the 13.8Volt really be 13.8Volt or “something” between 11.0 Volt and 15 Volt? With other words: How many people are going to use the HPSDR mobile?
 Linear (A “lot of heat”, not “green”, easy to construct and trouble-shoot)
 Switching (Less heat, more “green”, more noise, more difficult to construct)
 Transformers:
 From my opinion there will always be a normal mains-transformer, both in the switching and the   linear power supply option. Building a switcher for 110Vac/230Vac is too dangereous and complicated (safety regulations) for (less experienced) home-builders. The switcher will be situated in the low-voltage part.