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Reverse engineering Tektronix TDS3GV module for TDS3000 series oscilloscopes?

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Hairystuff:

--- Quote from: pmercier on November 14, 2019, 05:27:48 pm ---I confirm, the tds3eng did the trick !

--- End quote ---

Oh nice, where you able to access the serial port via the RS232TTL converter

james_s:
I've done the Dallas chip hack on a number of parts in that series with success but it's still a pain. The one in my TDS3000 failed again so I made an adapter to fit the still available DS1744 in the PowerCap (replaceable battery) package. Later I found the problem with the original DS1742W was a cracked joint where one of the nickel strips that went to the original battery connects to the PCB but I had already made the adapter PCB so I just used that.

Hairystuff:
My solution was alot less elegant but it seems to do the job. I had one of these fail on a Fluke Lanmeter 685 and it lost all the license keys, cal data and MAC address for the unit, I was worried a similar thing would happen to the scope.

james_s:
Thankfully nothing critical is stored there in the scope. It keeps the time and date, all the settings, the error log and the power-on hours. I figured out where those are stored and the format and was able to build a little rig hand program the 5 bytes for that. The bytes from x7E0 to x7E4 (iirc) hold the number of minutes the scope has been powered on. The cal data, power cycles and reference waveforms are stored elsewhere (eeprom?)

pmercier:
Ok, i tested the tds3eng for the serial port on my TDS3014 with a USB/TTL.

I can print over the serial port, but ... the GPIB commands seem to be unavailables :\
Sent a "*IDN?" but got nothing in return.

Just to be sure i did the same on my TDS3032C and the answer where returned.

Damn !

Okay now i can stop taking photos of the screen so it's already a small win, but it bug me  |O

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