Hi,
maybe someone has encountered the same difficulties...
I have a circuit with DAQmx blocks that generates a waveform and writes it to the buffer.
The outputs channels 0,1 concide with the outputs on the bnc-2110 block.
These outputs are wired with coax to scope channels 1 (x) and 2 (y).
Now when I disconnect 1 cable I see a perfect waveform. But once I connect both cables to the scope
I get only a perfect reading at channel Y. Channel X is corrupted.
When I switch the cables at the bnc-2110 and leave the connection at the scope, still Y is perfect, X is corrupted.
So connecting output channels 0 or 1 to scope channel 1 (x) does not make a difference. X stays corrupted.
The same holds for Y. It stays perfect.
The odd thing is that when I connect scope channel 1 (x) with a waveform generator, and scope channel 2 (y) with
channel out 0 or 1 of the bnc, I get 2 perfect readings. Only thing I can see is that the output of the generator is grounded.
When I reverse this. I get a perfect reading from the bnc at scope channel 2 (y) and again a corrupted signal at scope channel 1 (x)?!
So it seems that I get 2 perfect readings when x from the bnc has been replaced by the function generator.
Both should be grounded. The switch is in position GS (instead of FS). I connected the scope and computer to the same
electrical adapter, to be sure, but still have the impression I have grounding issues...
Bob
