[time-nuts] How I got my FE-5680A to lock in Sydney, Australia

Jamieson (Jim) Rowe jimrowe at optusnet.com.au
Sun Feb 9 15:58:24 EST 2014


Hi Mark,

I doubt if the counter is off frequency, since I'm using the 1pps pulses 
from my GPSDO as its timebase. So although there's a bit of short-term 
jitter, the longer-term count should be very close.

I will try the experiment you suggest, though, and see what difference 
inversion makes to the frequency swing before locking (or non-locking).

Thanks,


-----Original Message----- 
From: Mark Sims
Sent: Sunday, February 09, 2014 4:37 PM
To: time-nuts at febo.com
Subject: [time-nuts] How I got my FE-5680A to lock in Sydney, Australia

What was the timebase for your counter?   I suspect that it is off freq and 
the Rb is not actually making it above 10 MHz.  Inverting the Rb is causing 
a 2G shift in gravity to the Rb crystal probably shifting its freq enough to 
cause lock.
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