- #1
Mikech
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I just started to use a lock-in amplifier, and I am trying to following the procedures by adjusting zero phase. But my input phase changes with time and sensitivity, and I couldn't lock in onto it. The question is, is this normal that phase changes all the time during the experiment or if there is something wrong with it?
here is some numbers
pre-amplifier sensitivity was set to 1e-5,1e-6,1e-7)
With lock-in amplifier sensitivity (1 mV), phase changes between ~ +170 through -170 degrees
With lock-in amplifier sensitivity (5 mV), phase changes between ~ +90 through -90 degress
With lock-in amplifier sensitivity (10 mV), phase changes between ~ +40 through -40 degrees
Thanks
here is some numbers
pre-amplifier sensitivity was set to 1e-5,1e-6,1e-7)
With lock-in amplifier sensitivity (1 mV), phase changes between ~ +170 through -170 degrees
With lock-in amplifier sensitivity (5 mV), phase changes between ~ +90 through -90 degress
With lock-in amplifier sensitivity (10 mV), phase changes between ~ +40 through -40 degrees
Thanks