Hi all,
I recently acquired a TDS794D and am having an issue with Channel 2 and a slight issue on Channel 1.
It was originally failing the boot self-test with a "ERROR: diagnostic test failure, dsyRastModeV0Walk, raster fail @ 1,1 read: 8, expect: f" error which I assume is probably a video RAM or other video error, but I had a spare Processor board from a TDS754D with other faults that I swapped in and flashed the TDS794D firmware on, all working ok now.
Next is Channel 2 and Channel 1. I am getting spurious signals on these channels, Channel 2 in all settings, and Channel 1 in only one setting.
Linked image is Channel 2 with no signal input. If I connect a signal, the signal is shown with these spikes overlaid.
I'm hoping this is a RAM issue as I have a bunch of RAM chips I have pulled from scrap acquisition boards.
Has anyone seen this fault before and knows the likely fix?
Thanks!
Jared
Jared Cabot