[time-nuts] DMTD - analog multiplier vs. diode mixer ?

[paul swed]

Yes must have been a year or so ago there was a thread I recall that
someone was doing that.
Thats one expensive approach to the problem.
Regards
Paul
WB8TSL

On Wed, Jan 6, 2016 at 2:37 PM, Bruce Hunter via time-nuts <
time-nuts at febo.com> wrote:

> I realize this would not measure frequency or phase difference; but has
> anyone used a lock-in amplifier to compare two 10 MHz signals -- for
> example to adjust a rubidium oscillator to agree with a GPS reference?
>
> Bruce, KG6OJI
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