[time-nuts] Info on HP 10514A and 10534A mixers?

Rex rexa at sonic.net
Sun May 27 17:12:40 EDT 2007

On Sun, 27 May 2007 16:32:49 -0400, John Ackermann N8UR <jra at febo.com>

>Anyone have a manual for either (or both) of these mixers?  I picked up
>a couple in very nice shape at the Dayton Hamvention and am doing what
>may be a very interesting experiment that involves using them to downmix
>two synthesizers set to produce a difference frequency in the HF range,
>and then measure their phase noise via the difference frequency.
>In particular, I'm interested in the optimal input levels, the output
>frequency range, and to verify what the "L", "X", and "R" connector
>markings are.  I'm assuming L is local oscillator, X is input, and R is
>output, but that's just a guess (for all I know, "L" could be "left" and
>"R" could be "right"!)

L X R is pretty normal marking for the mixer ports, but sometimes the X
is labeled I.

L = Local Oscillator
R = RF
X or I = mix or IF

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