[time-nuts] Simple GPS 10 MHz frequency standard

J. L. Trantham jltran at worldnet.att.net
Thu Jun 19 19:32:23 EDT 2008


I too feel well behind most everyone here but I am trying to keep up.  I am
looking to build a GPSDO as a second reference to my Z3816A.  I have been
looking at several possibilities including using a HP 105B as the oscillator
and building a comparator circuit to control the unit (TAPR boards perhaps)
as well as Brooks Shera's circuit using a spare 10811 as the oscillator.

I would very much like to see your schematic.  You can send it to
jltran at worldnet.att.net.



-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of Bob Q
Sent: Thursday, June 19, 2008 9:58 AM
To: time-nuts at febo.com
Subject: [time-nuts] Simple GPS 10 MHz frequency standard

I think everyone on this discussion board is way ahead of me, but if
anyone's interested I have a simple, analog PLL, GPS 10 MHz standard design
that I just built.  It uses a Motorola Oncore M12+ with the output set to
100 Hz instead of 1 PPS.  I have only checked it by using a free-running 10
MHz OCXO and my 'scope.  It looks to be stable to a few parts in 10^9.  Let
me know if you're interested, I'll be happy to send the schematic.
Meanwhile, I'll keep reading and learning. 
Bob Q.
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