[Amps] Checking for IMD

[Michael Tope]

----- Original Message ----- 
From: "Peter Chadwick" <g3rzp at g3rzp.wanadoo.co.uk>



> Gary said:
>>The old HP141 will do it but even it has stability trouble with the
> 1.2 ghz rf head in it. <
>
> The oscillator that downconverts the first IF to 500MHz is about 1500MHz, 
> and is free running. It's surprising that it manages the stability it 
> does.
> One of these days, I'm going to do a PLL to stabilise it.
> 73
> Peter G3RZP

Even the 110 MHz head isn't terribly stable, Peter. I agree that a modern
PLL/DDS based synthesizer for this analyzer would be a really useful
project.

Mike W4EF....................................