[hpsdr] Power Supply +/-12 vs. +/-15V

[john_eckert at agilent.com]

I'm putting my HPSDR cards into a box with the SDR1000 stack.  Linear supply, 
all HPSDR/Flex connections inside the box.

HPSDR has +/-12V power requirements. The Flex uses +/-15V for the INAs.  

OPTIONS:
i.  So far it looks like the HPSDR cards have on board regulators and would 
probably be OK with +/-15V.  

ii.  I think the Flex INAs can be run at a reduced +/-12V.

DRAWBACKS:
i.  +/-15V to HPSDR.  Higher dissipation in on board reg's.  Could be an issue 
with future HPSDR boards.

ii.  +/-12V to Flex. Less RX DNR?  More RX noise?  Anyone know?



I'm thinking I'll just run +/-12V to the Flex at this point or maybe split the 
difference at +/-13.5V.  I love democracy!


Comments please.

73,
John
k2ox