I use 6221 with radio frequency lock-in amplifier (RF LIA) (SR844) and trigger signal is connected from RF LIA to 6221.
6221 generates triggered sine wave signal.
At here, I want to change the polarity of sine wave signal (-sine). Now, I just change its polarity by using mechanical switch but I want to do it with remote control. I think that the way to change polarity is that one is put phase delay between trigger signal and signal output as 180 degree. Second is using internal toggle switch. However, I cannot fine any function.
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