[AMPS] IMD

[Mike]

Has anyone had any luck using receiver feeding a soundcard in conjunction 
with a program like Spectrum Lab to resolve the closely spaced IM sidebands
from a PA?

Mike, W4EF...........

----- Original Message ----- 
From: "Peter Chadwick" <Peter.Chadwick@zarlink.com>
To: <amps@contesting.com>; <ilkka.kontola@nokia.com>
Sent: Tuesday, September 18, 2001 5:53 AM
Subject: RE: [AMPS] IMD


> 
> 
> >> We have to remember a two-tone test does not show IMD caused 
> >> by poor dynamic power supply regulation.
> 
> 
> According to Pappenfus, a test with very closely spaced tones (<50Hz) will do it
> - but you need a spectrum analyser with very good resolution.
> 
> 73
> 
> Peter G3RZP
> 
> 
> 
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