Math Source and Signal-to-Noise-Ratio
Hi RTB2000 Community,
I still would like to buy the RTB 2000. Could someone, who already has this device, tell me,
1. if the math trace source can be a reference waveform? The user manual seems to say: No, only measurement channels or other math channels?
2. what is your preferred method for measuring the signal-to-noise ratio / signal noise independent from the device noise?
I am asking, because I would solve item 2 with this method:
a) measure StDev of the noise floor without any signal: Device Noise
b) measure the signal in average acquisition mode to eliminate the noise (down to a sufficient level) and save as a reference waveform.
c) Switch average acquisition mode off again and create a math channel to substract the reference from the signal (needs 1. : Reference as math source).
d) Calculate StDev from this math channel
e) Calculate the signal noise StDev with sqrt( StDev(noise from d)^2 - StDev(noise floor from a)^2 )
I expect, that this could be done with SCPI/Python script, but within the device would be much better.