6 Feb
2022
6 Feb
'22
9:20 a.m.
I have one of these and would like to use it, however it appears to only
partially work.? Here is what I have found that works and what doesn't:
1. CSR and DBR are present and operational.
2. Jumpers set to 'factory'.
3. D/A portion works, can deposit codes in ODT and see voltages out on
DAC pins that change depending on the octal value deposited in CSR+4 or +6.
4. A/D portion returns full scale code, either 3777 (2's compliment) or
7777 (offset binary) whether in the input is open or shorted to gnd.
I think the problem is that the A/D inputs are not exactly protected and
damage has occurred to this portion in the past.
Does anyone have any info on the A/D module?? Who made it?? Can you open
it up?? Does XXDP have a test for this?
Doug