6 Feb
2022
6 Feb
'22
9:22 a.m.
The board was made by Data Translation.? There is an identical board
sold by them, in the DT2x6x series but I can'r remember the exact number.
Nigel Johnson, MSc., MIEEE, MCSE VE3ID/G4AJQ/VA3MCU
Amateur Radio, the origin of the open-source concept!
Skype: TILBURY2591nw.johnson at ieee.org
On 2022-02-06 12:20, Douglas Taylor via cctalk wrote:
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