Fri Sep 4 12:59:48 UTC 2009
The phase modulated output of the System Under Test is demodulated using a
phase modulation test set. The harmonic levels are measured with a spectrum
analyzer and the total harmonic distortion is calculated. A low pass filter
is used between test oscillator and modulation section to insure that the
modulation drive signal has less than 0.3% distortion.
----- Original Message -----
From: "Mark Kahrs" <mark.kahrs at gmail.com>
To: "Discussion of precise time and frequency measurement"
<time-nuts at febo.com>
Sent: Sunday, September 20, 2009 12:26 PM
Subject: [time-nuts] HP 8660C-K10 phase modulation test set
> Among my mistaken acquisitions over the past is a phase modulation
> test set for the 8660C (model 8660C-K10).
> I've put two pictures here:
> This looks like a type of phase noise test set: there is a LO in a
> sealed box in one corner. There are mixers and detectors and a
> divider board.
> I thought I would see if there was any interest from time-nuts before
> I put it on the usual auction site.
> time-nuts mailing list -- time-nuts at febo.com
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