My experiment is not going well so far. I have NOT done any tuning. Just
connected 1 pps out from GPS to 1 pps IN on 5071A. Frequency keeps increasing,
which I think is weird. I thought it might just be unstable without proper
parameters, but no. Over last 24 hours, it kept going up. I was about to
start reading the 5071A manual. Likely as TVB says, it will likely be needing
quite a bit of refining loop parameters. One unknown is, in this current state
(fault), if OCXO is even steerable. 1 pps WAS detected and menu option did
tell me so.
I didn't know you can put 5071A in (Cs tube only) STAND-BY mode... Mine is
dead so it's in permanent stand-by. It's initial boot sequence detects this
and shuts it down.
On a slightly different topic, my PRS10 + GPS experiment is working rather
well. I haven't done any tuning and using default for everything. I'm going
to wait about a month before doing so. Loop constant is 1 day, so it may take
quite some time to completely stabilize.
---------------------------------------
(Mr.) Taka Kamiya
KB4EMF / ex JF2DKG
On Thursday, December 19, 2019, 5:34:55 PM EST, Mark Sims
<hol...@hotmail.com> wrote:
I've actually done this... Lady Heather has built in "alternate disciplining"
algorithm for the Thunderbolt. I tricked up some code to use this along with a
TAPR-TICC to make a GPSDO. The first (rather crude) hack worked pretty well.
I haven't had a chance to do it properly... yet.
The idea was to allow the 5071A to run with the CBT in standby for applications
that do not require the cesium goodness.
-------------
> A fun (and actually very useful) project would be to turn it into a
GPSDO
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