Hey there,
Im deep into calibrating a bunch of gear and I'm starting to doubt/wonder about my signal generating methods.
I understand that 0VU (+4dBu) is 1.28V RMS. When measuring a balanced signal (TRS cable from a balanced output) I have been measuring across positive and ground leads.
Is this correct? Most signal generators are unbalaced output (hot/ground) which makes it easy. I never trust the "voltage" output of my generator and always measure with a multimeter to make sure.
Problem: I am attempting to calibrate a stereo bus comp (API2500) as I needed to replace the meters. The calibration steps begin with a 0VU signal at 2k. But at this level, the signal is too hot for the trim pot to adjust for 0VU on the meter. Im using the balanced output of my interface to send the 2k RMS sine test tone (which is 600Ohm) at 1.28V @ 2Khz into the XLR inputs of the unit.
If my multimeter isnt true RMS will I get inaccurate readings? I've been using my mm for a long with this same method.
What am I missing?
I feel like a noob idiot! It's salso possible something is funky with this unit...
Im deep into calibrating a bunch of gear and I'm starting to doubt/wonder about my signal generating methods.
I understand that 0VU (+4dBu) is 1.28V RMS. When measuring a balanced signal (TRS cable from a balanced output) I have been measuring across positive and ground leads.
Is this correct? Most signal generators are unbalaced output (hot/ground) which makes it easy. I never trust the "voltage" output of my generator and always measure with a multimeter to make sure.
Problem: I am attempting to calibrate a stereo bus comp (API2500) as I needed to replace the meters. The calibration steps begin with a 0VU signal at 2k. But at this level, the signal is too hot for the trim pot to adjust for 0VU on the meter. Im using the balanced output of my interface to send the 2k RMS sine test tone (which is 600Ohm) at 1.28V @ 2Khz into the XLR inputs of the unit.
If my multimeter isnt true RMS will I get inaccurate readings? I've been using my mm for a long with this same method.
What am I missing?
I feel like a noob idiot! It's salso possible something is funky with this unit...
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