[time-nuts] Crystal filters in test equipment

[Taka Kamiya]

I don't have sophisticated instruments, so I did a basic test.  Feed 2MHz into a spectrum analyzer and place a 2MHz crystal in series.  I didn't concern myself with impedance matching or any other details.  Just a coax in and out.

It basically acts like a very sharp filter.  What it does to phase noise, etc, is beyond my ability to measure.  I'll have to remember this trick....  It might come in handy!

--------------------------------------- 
(Mr.) Taka Kamiya
KB4EMF / ex JF2DKG
 

    On Thursday, March 26, 2020, 7:32:24 PM EDT, Perry Sandeen via time-nuts <time-nuts at lists.febo.com> wrote:  
 
 Learned Gentlemen,
Both the HP 106 and 107 have a post oscillator crystal filter.  There is also a 10 MHz crystal filter used in my Tracor 527E FDM.
So the question I have is there anything to be gained by adding 10 MHz crystal filters to the 10811 and similar OCXO's?  They are very inexpensive to purchase.
Regards,
Perrier
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