6 Feb
2022
6 Feb
'22
9:41 a.m.
Yes, I have a couple of those and they are very close to the AXV11-C,
except for the D/A.? They have a similar method of working.?? The A/D
modules look 'identical' but I am suspicious that there are variations
of these modules that aren't readily apparent.
On 2/6/2022 12:26 PM, Nigel Johnson Ham via cctalk wrote:
Now that I have thought a bit more, I think it was the
DT2762
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
>