DEC AXV11-C analog board
Nigel Johnson Ham
g4ajq1 at gmail.com
Sun Feb 6 11:26:32 CST 2022
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
>
More information about the cctalk
mailing list