Hello,
Quick and late (here) update:
The TDS544A had been put aside a while, the TDS540 passed self tests but
needed a recap for A11 and A12 boards, A10 had been taken care of by
someone before things turned bad.
Now I have a working scope to confront the failing TDS544A with.
The test point TP1608 is at -6.72V, TP1658 at -6.74V in the working scope.
Just for future reference.
What would be a good choice/source for a budget USB GPIB interface?
Avoiding fakes.
Paul
2016-03-25 9:00 GMT+01:00 kennedy.simon@... [TekScopes] <
TekScopes@...>:
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TL074/TL072 work fine. Glad the schematics have made it to KO4BB.
I'm not too sure what the voltages should be at those test points. I
would strongly suggest tying to find a GPIB adaptor somehow as it makes
this debugging quite a lot easier. I had problems with the error log
getting too long to find the latest errors.
Even if the traces looks like they are connected make sure to check them
with a multimeter for continuity.
Simon
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Posted by: kennedy.simon@...
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