[AMPS] IMD measurement scheme

[w8jitom@postoffice.worldnet.att.net (w8jitom@postoffice.worldnet.att.net)]

> From:          "George T. Daughters" <gdaught6@pobox2.stanford.edu>
To: <amps@contesting.com>
> Date:          Thu, 24 Jul 97 11:26:24 +0000

> it seems like the "schmutz" level stays pretty constant... so that 
> often means that the "signal-to-schmutz" ratio goes down when the 
> power output is reduced!

That is what I observed on several radios. Another problem is 
the ALC overshoot. Bipolar transistors seem to have a certain 
amount of nearly constant level crossover distortion. 

It'd be nice to see more tests at various power levels. 

73, Tom W8JI 

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