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[Amps] Measuring IMD in a home workshop

To: amps@contesting.com
Subject: [Amps] Measuring IMD in a home workshop
From: Peter Bertini <radioconnection@gmail.com>
Date: Mon, 20 May 2019 14:40:03 -0400
List-post: <mailto:amps@contesting.com>
I'm wondering what techniques others are using to make IMD tests for
external RF power amps using test gear that would be commonly found in a
home workshop.

Spectrum Analyzers are cheap enough--I have several vintage HP 141T
analyzers set up, and a very capable Tek 497P with 100/10 Hz RBW.

My problem regarding two or three tone tests is that my rigs all have
comparably terrible IMD.  Several Ten Tec rigs, and a JRC NSD-515.  None of
them have spectacular IMD performance. How do you get around these
limitations?
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