[time-nuts] z3801 - holdover and recovery issue
Ron Hahn (EI2JP)
ei2jp at dhco.org
Mon Jul 11 14:29:08 UTC 2011
On 7/11/2011 2:54 PM, Jason Rabel wrote:
> My guess would be one of two things...
> First check the EFC on the OXCO, if it's near the edge of the tuning range you might need to adjust the Coarse Adjustment screw to
> get it back to near-center of the EFC range.
Interestingly, the 14:21:14 report reports EFC: OK ... But, it is
tracking no (i.e. zero) satellites. This is a bit hard to believe as
the aerial is outdoors at the peak of my roof with a clear view of the
sky to the horizon in all directions..
> Second, as Bob said, it could be the GPS receiver (I believe these had Oncore 6-channel VP receivers), or maybe even the GPS antenna
> or possibly the cable run.
I am beginning to think this is a GPS receiver problem, as mentioned
above.. I'll have a watch on the status pages for a while.
> The VP receivers appear on eBay every now and then. I'm *pretty* sure the 8-channel VP models can be sent a command to emulate the
> 6-channel models.
Are all the 6-channel oncore receivers the same (i.e. are they drop in
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