07-20-2014, 01:42 PM
Actually, DC measurement can only be used without signal.
If there is a signal, the measurement can be anything.
Only scope can show the actual picture.
Also, from last time I dealt with Audio amps (long time ago but...) I remember that if the idle was insufficient, not only the crossover "step" was present but also there sometimes was oscillation present at the peaks of the signal.
If you short the input and you still have this garbage reading, use scope.
And, if DC reading is OK, put signal and....use scope.
You do have a scope, right?
If there is a signal, the measurement can be anything.
Only scope can show the actual picture.
Also, from last time I dealt with Audio amps (long time ago but...) I remember that if the idle was insufficient, not only the crossover "step" was present but also there sometimes was oscillation present at the peaks of the signal.
If you short the input and you still have this garbage reading, use scope.
And, if DC reading is OK, put signal and....use scope.
You do have a scope, right?
