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Reverse engineering Tektronix TDS3GV module for TDS3000 series oscilloscopes?
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pschirrer:

--- Quote from: av500 on June 05, 2020, 11:15:10 am ---
--- Quote from: pmercier on May 28, 2020, 12:47:01 pm ---
24 CARD_INSERTED (5K to ground for 3GM)


--- End quote ---

same for TDS3GV which I bought just before you posted that 5K to GND value which probably is enough to fake it :/

--- End quote ---

Hi I soldered a resistor directly on the connector between pins 24 and GND, but no expansion card reported by the scope (TD3014 SW Rev 3.39), not sure it is enough...

Regards
pmercier:
Hi, quick answer :
yes it's not enough for the oscilloscope to detect the good card. It just allow the scope to detect a card was inserted.
I finished the reverse just recently and got the scope to detect a specific card but I didn't had the time these last days to publish any results. I'll do it this weekend.
pmercier:
I know I promised to publish and share my results last week end. I got delayed by mother nature who put a wasp nest inside my car ... they got me pretty bad. At least I wasn't driving at that time.

So now that am on foot again, I took the time to create a build log for the project I had in mind when starting the reverse. All of the informations are posted there : https://hackaday.io/project/172242-extension-card-for-tds3000-scopes/log/179520-the-actual-informations

Only the two last logs have informations not present here.

Hope it'll be useful.

No original card was inserted when taking this photo ;)

Galen:
Thanks pemecier, very useful information.
buffdriver:
My thanks as well!  With the information presented here and on the hackaday site, I was able to mimic the presence of a serial communication module and send the necessary commands to turn my TDS3012 into a TDS3052.

I will continue to monitor the progress and would definitely consider building a board to have persistent serial, vga, and/or ethernet capability.  I really appreciate all who have contributed.
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