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I wan to use of lock-in amplifier SR830 in the three omega experiment and I need to have a range of frequency and fo reach frequency I want to measture
thrid harmonic voltage. I connect the lock-in amplifier to the function generator and run the sweep frequency program of Function generator 33120A.
I wounder how I can get the frequency through lock-in amplifier and measture the thrid harmonic voltage for each frequency the function generator sweep.
the sr 830 can be locked to a source (on the rigth side of the front panel you can swicth from internal synch and external synch); you have to put a TTL signal through a BNC near the synch selection)
then, get the SR 830 driver, and lear how to control it through labview
N
PS if you are thinking of the three omega as proposed by cahill, make sure you have the correct formula, there is a factor of 2 error in the dT formula, corrected in another subsequent paper by cahill
