[hpsdr] Lessons learned - again

[Tom Homsley]

Some things to watch out for:

ATLAS
If you take a magnifying glass and look at the pins on the back of the
connector, you will see that  one end has "A1 B1 C1" The other end says "32
32 32" The A1 B1 C1 pins go into the square pads. The connector portion
should be on the silk screened side of the board so that the boards can plug
into the connectors on the Atlas board from the silk screened side.

>From the Atlas manual, A1, B1, and C1 all connect to +12 VDC. and A32, B32,
and C32 all connect to the +5VDC power supply. So, you are OK in measuring a
short between A1,B1, and C1 and also A32, B32, and C32. The same should also
be true for A26, B26, and C26 which go to the -12 VDC power supply and A28,
B28, and C28 which go to the -5 Vdc power supply and A30, B30, and C30 which
go to the +3.3 VDC power supply. 

Thanks to Duane, W5PNM for this info

Make sure you get a PSU with a 20-pin connector.  Some of the newer ones
have 24 pins.

20-pin MOLEX connector pinout:
http://www.interfacebus.com/ATX_Motherboard_Main_Power_Connector_Pinout.html



JANUS/OZY

Ozy and Janus card location:
>From the Wiki:
P2 allows local configuration of U11 by a standard Altera-compatible JTAG
programmer. U11 may also be programmed over the ATLAS bus by another device,
such as Ozymandias.  For the latter, JP12 must be placed if Janus is the
last card from the master. There must be no empty slots beween Ozymandias
and Janus for this to work, and Ozymandias must be "upstream" from Janus. If
all slots are filled, then the "upstream" requirement is no longer in force.


Helpful pictures
http://www.we4s.com/