[time-nuts] Need to measure frequencies of two sources simultaneously

Said Jackson saidjack at aol.com
Wed Oct 23 01:18:35 EDT 2013


Use three counters, a known-good reference and cross/auto-correlate?

A versus B
A versus Ref
B versus Ref

Three corner hat technique..

On A versus B you may have to pre-scale the one used as the counter reference down to 10MHz.


Sent from my iPad

On Oct 22, 2013, at 21:59, Richard Karlquist <richard at karlquist.com> wrote:

> On 2013-10-22 21:37, Bob Albert wrote:
>> If the two frequencies are near one another you can measure the
>> difference frequency, which may or may not be helpful.
> The difference frequency does not work for us, just as the
> ratio does not work for us.  Thanks.
> Rick
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