WaveForms, AD3 and Scope Trigger

[sng2024]

Hello all,

I'm new to this forum having just purchased an AD3 to mess around with and hopefully learn something!

I set up Wavegen to output a sine wave to a resistor in series with a diode exactly like in the attached image (but with a 1k resistor and a 1N914 diode). W1 is set to output a triangular wave 5Vpp without any offset. I then set up the scope as in the second attached figure with an XY display. The XY display does not look like a normal diode IV curve. So what am I doing wrong?

When I add a Math channel as in the next attached figure, I see the same problem. Again what am I doing wrong?

I've tried different diodes and received similar results.

Thanks.

 

[sng2024]

Hello everyone,

I guess I was a little premature in posting the above. I disconnected the AD3, quite WaveForms and tried again. It worked this time.

I guess the issue is the stability of the AD3, the USB connection and the ability of WaveForms to synchronise with everything. Any thoughts?

Thanks again.

[attila]

Hi @sng2024

This rather appears to be a connection issue on the first test, of 1- not making contact.

[sng2024]

You are absolutely correct. I discovered the loose contact at the connector itself. Thanks a lot.