[time-nuts] G3RUH GPS Stabilized Oscillator

Jack Hudler jack at hudler.org
Sat Jan 20 18:00:13 EST 2007


Count the number of oscillations between the 1PPS, that will get you 1x10-7 any
thing more you'll need an oscilloscope to see the phase crossing.

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On Behalf
Of Richard W. Solomon
Sent: Saturday, January 20, 2007 3:17 PM
To: Time-Nuts
Subject: [time-nuts] G3RUH GPS Stabilized Oscillator

I built two of the GPS Stabilized Oscillator circuits (G3RUH as
modified by N1JEZ). They seem to work, except that I still have
not been able to confirm that the 10 MHz XO (FOX) is truly locked
up to the GPS signal. I can verify that the GPS Engine is locked,
but I still cannot prove to myself that the XO is locked.

I made one up to lock up a 1 GHz PLO that I can use for calibration
of my Service Monitor and the other to use as external references to
a couple of EIP counters.

Any thoughts or suggestions (other than using the services of NIST !!). 

73, Dick, W1KSZ 

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