[time-nuts] Lucent RFTG-u REF0-REF1 cable

Bob Camp kb8tq at n1k.org
Wed Nov 15 10:00:36 EST 2017


At some very basic level, the GPSDO needs to decide when to go into or come
out of holdover. That decision often involves initial setup of the GPS module and
subsequent monitoring of the module. The risk in swapping modules is always
tripping over an obscure IF statement somewhere that does not work right with
the “new” module. On the Lucent boxes, there is a survey process “up front’ that
likely gets tangled when you change modules …..


> On Nov 15, 2017, at 1:27 AM, Mark Sims <holrum at hotmail.com> wrote:
> It might be eye candy, but is very useful eye candy when coupled with the satellite SNR values.  A GPSDO does not NEED any communications to the GPS or the outside world,  but EVERY commercial one does support it.  
> The GPSDO firmware asks for the sat info from the GPS (so it can show it in the SYST:STAT status page) and, if it doesn't get it, it assumes the GPS is defective, crawls into a corner, and sobs.
> ----------------
>> Isn’t info about what satellites are where, just eye candy and irrelevant to a real GPSDO?
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