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Reverse engineering Tektronix TDS3GV module for TDS3000 series oscilloscopes?
stas_last:
Не так страшен чёрт, как его малюют - Russian proverb 8)
if they were sewn into 24 memory, then I think it’s not difficult. Slot machines are more difficult fact.
pmercier:
It not stored in the 24c memory. Only buyable software options keys are stored inside the memory chip.
You can put any interface card in your scope without having to alter or add an option key in the 24c memory. For info the only extension card having an inbord memory is the Ethernet one. But all of them have discrete ttl logic for the buffer chips of the expansion slot. I think that it's where the card detection logic is implementing but I can't find the missing traces on the pcb to find a logic for the detection.
james_s:
I can xray the TDS3GV module if that would be helpful for further reverse engineering. It will have to wait until after this whole Covid thing blows over though as I don't have the machine in my house. Multilayer boards get a bit messy but with careful setting of the kVp and exposure it's often possible to image the traces.
pmercier:
Found back my notes and shcematics from traces this morning. I'll take a look tonight to see what traces was missing for the reverse, but an xray would be awesome as we would be able to see where exactly the traces are going below the connector.
Stas_last : Concerning the connector you can insert a 1.6mm PCB inside the scope connector with 50 mil spaced traces. It won't be reliable for long term reccurent dis/connection, but for home usage it can be enough if you can make them stay in place.
pmercier:
My most advanced reverse is for a TDS3GM. But it miss many connections due to hidden traces.
@james_s i'm definitively interested in a TDS3GV xray !
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