Products > Test Equipment
Reverse engineering Tektronix TDS3GV module for TDS3000 series oscilloscopes?
pmercier:
The 100pins connector can be replaced by a standard 1.6mm pcb. It fit inside without a problem.
Thank you for the serial mapping.
pmercier:
Found my old notes from pocking inside the scope and it triggered an heavy desire to loose some sleeping hours ;)
Looking at the pins you marked as ground, I've found the same ones for ground on the scope motherboard.
Found the board connector (hope i got the good one) and ordered a testing PCB. Am actually waiting for both of them to arrive.
From what i found when pocking around :
* The screen signal from the J500 connector is present on the extension connector directly (Don't think i'll do something with it, but ... can be fun to play with it later)
* Data (16) and address bus is accessible (found only 11 lines for the moment)
* Something that i need to check again : RTS is connected to the *WR ... seem odd
pmercier:
Forgot the link for the connnector : https://www.mouser.fr/ProductDetail/TE-Connectivity-AMP/1-1734099-0?qs=hnUcNC2tU0rNktC3%2FzE9dQ==
james_s:
Oh there you go, yeah that looks right, AMP 1-1734099-0, good find. It's not even very expensive, I'd buy one myself but I already have the original module so not much to be gained in duplicating the work of others.
If all the ground pins I marked are ground on the motherboard then I wonder how it detects that the module is installed? If wiring up a comm port doesn't just work I'll have to take another look and see if I can find any likely suspects. The serial settings are not disabled without a comm module but it does definitely know when it's there and list it on the boot screen.
Yeah the video I assume is just the exact same signals that go to the TFT, I've used the similar ADV7123 VGA DAC before and it accepts exactly the same digital RGB/H/V/Dotclock signal as these older TFT displays. I have a VGA output on my other scope and I've never actually used it, the built in display has always been adequate for me.
Makes sense that the data and address bus would be there, the GPIB interface would need that. Does sound odd about RTS going to WR, if it doesn't work I can take it apart again and double check but I'm pretty confident I got the pins traced out correctly.
pmercier:
Little update. Received the connnectors today. They're a perfect match.
I soldered dupond wires for the 3.3v serial/usb module directly on the provided pins and ... worked like a charm once i removed the hardware control flow from the scope config.
Sended : *IDN?
Got : TEKTRONIX,TDS 3032C,0,CF:91.1CT FV:v4.05 TDS3FFT:v1.00 TDS3TRG:v1.00
:-+
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