[time-nuts] Rb vs.Crystal OCXO

Tom Van Baak tvb at LeapSecond.com
Sun Apr 27 14:02:24 UTC 2014

> The Pendulum GPS-88 and GPS-89 have a button on the front you push when 
> you want to force it into hold-over to do your measurement, for this 
> very reason.
> PPS steering and OCXO steering is the same thing once you forced the PPS 
> into the right range. Some *really* depend on the synchronicity between 
> 10 MHz and PPS, and you should not obscure it if possible.
> Cheers,
> Magnus

When doing a sensitive measurement where stability is more important than accuracy I turn off GPS disciplining.

The TBolt has commands to go into and out of holdover. But more effective are the 0x8E,0xA3,4 and 0x8E,0xA3,5 commands which simply disable and enable disciplining.


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