fully differential measurement

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oskar11

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I want to measure a breadboarded circuit which has differential input and differential output. My problem is that we have no differential probe oscilloscope and differential signal generator.

How can I generate differential input signals and measure them?

For generating differential signals, does syncing two signal generators solve my problem?

And for measuring i guess, i can differentiate the signals on separate channels with the oscilloscope in the lab.

Can you help me for my measurement and give suggestions?

Thanks...
 

If your signal generator and scope don't have a common GND, you could create an artificial differential signal by connecting the signal generator's output to 2 equal resistors (e.g. 2*25Ω for a 50Ω output), using the middle node as your differential signal's center (ac GND).
The same should be possible for the output side (with higher resistor values, of course), if your scope input is actually GND-free. But with dual channels, this shouldn't be necessary (may be there's even an "invert" button for the input?).
 

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