Hi there
I've tried but failed to find a easy to understand calibration procedure, so I'm hoping I'd ask my question on a new thread and will be summarizing the procedure for this particular board.
I've finished stuffing components in the board and made the relevant connections according to the MNATS wiring guide (big thanks to MNATS for doing the board and the wiring guide.)
I've checked all DC BIAS on all transistor and they seem to line up more or less, however I'm struggling when calibrating.
1) When asked to input a signal @ 0.775mV, I used Pro Tools to generate a 1k sin wave and measured the output voltage from pin 1 and 2 on the XLR. Is this correct or do I have to half the value because it's a balanced connection?
2) When turning the Q-Bias, the output voltage is changing very slowly, I had to wait up to 30 seconds for the voltage to stabilize, is this correct? And it seems I could never find the place where it would drop 1db, it'd stop at a very high value (2.75V) and then I keep turning and turning and nothing happens and then I reach a point for it starts to goes down VERY SLOWLY but will do way past the 1db mark.
Is this correct?!
Is there any obvious problem one can derive from the situation?
Many thanks,
Jyc
I've tried but failed to find a easy to understand calibration procedure, so I'm hoping I'd ask my question on a new thread and will be summarizing the procedure for this particular board.
I've finished stuffing components in the board and made the relevant connections according to the MNATS wiring guide (big thanks to MNATS for doing the board and the wiring guide.)
I've checked all DC BIAS on all transistor and they seem to line up more or less, however I'm struggling when calibrating.
1) When asked to input a signal @ 0.775mV, I used Pro Tools to generate a 1k sin wave and measured the output voltage from pin 1 and 2 on the XLR. Is this correct or do I have to half the value because it's a balanced connection?
2) When turning the Q-Bias, the output voltage is changing very slowly, I had to wait up to 30 seconds for the voltage to stabilize, is this correct? And it seems I could never find the place where it would drop 1db, it'd stop at a very high value (2.75V) and then I keep turning and turning and nothing happens and then I reach a point for it starts to goes down VERY SLOWLY but will do way past the 1db mark.
Is this correct?!
Is there any obvious problem one can derive from the situation?
Many thanks,
Jyc