How to measure DC offset on lm3875 GC

[Bedi]

What is right:
input is open(nothing connected),output is open (no speaker connected), or
input is shorted with gnd,output is open

In first case DC offset in my NIGC is 210mV and in second case DC offset is 7mV http://www.diyaudio.com/forums/images/smilies/confused.gif
Help please confused noobie

 

[ratza]

Measure the offset with the input shorted to the ground.

 

[Bedi]

Thanks ratza
In this case,I have excellent dc offset on output?

 

[Bedi]

Thanks ratza

In this case,my DC offset is excellent?

 

[ratza]

Absolutely.

 

[lanchile]

pretty good buddy!

if you Measure the offset with the input shorted and you got 7 mv...
that is pretty good!!!! I got the same as you with my LM3875 integrated amp.
enjoy your toy as I do too.

 

[Bedi]

Thanks lanchile

 

[PeterV98]

Could someone help me with measuring offset voltage on an audio opamp. It’s an opa134. I’m not a very experienced technician, but I do have a digital multimeter.