Alternating pulse polarity with Siglent SDG 1062X

[torquil]

My Siglent SDG 1062X is generating pulses at each trigger signal input, but I would like to have it generate pulses of alternating polarity, e.g. a positive going pulse on the first trigger occurrence, and then negative on the next, then potitive, and so on. Can it be done directly with the SDG 1062X? If not, what would be the simplest way to achieve this? Set up each channel with opposite polarity and then somehow set up some switching between the outputs?

 The trigger signals are not regularly spaced in time.

[tautech]

As you've discovered the UI won't allow for this however it could be done as a Arb waveform uploaded and saved into the SDG. Have a look at doing it in EasyWaveX and use a single or continuous Burst manually triggered.

[egonotto]

Hello,

could you explain how this go with Arb?

Best regards
egonotto

[tautech]

With polarity, amplitude, period, duty, pulse, frequency, and burst SCPI commands.
https://int.siglent.com/u_file/document/SDG_Programming%20Guide_PG02-E04A.pdf

[torquil]

Hmmm, could you please elaborate a bit on how it could be done? I did not mean to generate a pair of opposite polarity pulses at each trigger event. I meant that each trigger event should be followed by a single pulse, but with opposite polarity each time a new trigger event happens.

[JohnPi]

I haven't tried this, but could you use both outputs tied together (== summing them), and have each set to burst (N=1) mode; one with +edge trigger, the other with -edge ? You could then get a + pulse on your trigger rising edge, and a - pulse on the trigger falling edge.

Else, if your triggering is quite slow (say < 1/s), in principle, you could reprogram it between trigger pulses.

[torquil]

Interesting suggestion. Unfortunately, I cannot influence the trigger signal at the source, but perhaps I could do something like what you suggest if I process the trigger signal on its way towards the signal generator. I haven't checked in the SDG1062X if I can set each channel to react to different trigger signal edges, but it would be nice if that was possible.