[Boatanchors] how to read microvolts

Jim Brannigan jbrannig at optonline.net
Mon Apr 2 12:23:33 EDT 2007


Dick,
You really can't without expensive lab equipment, but why try?
Verify that the values in the attenuator(s) are correct, measure at the 
"millivolt" level and do the math.

As others have mentioned the old Heath generators were very leaky.  You 
can't trust the measurements anyway.

Jim

> This may be a dumb question but I really cannot find a way to read 
> microvolts of RF.  My old Heath RF sig gen has bad resistors in the 
> attenuator but I only know that by reading the values of the resistors. 
> What can I use to read the output of the sig gen in very small values of 
> microvolts?
>
> My scope will not read that low and my VTVM with RF probe will not read it 
> either. I can read millivolts on various pieces of my test equipment but 
> the only thing I can think of is to boost the signal with an amp and then 
> allow for the difference as long as I can be sure of the total gain of the 
> amp.
>
> Please enlighten me.
> Thanks and 73, Dick KF4NS
> St Petersburg, FL 33714 USA
> Keep The Glow!
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