[time-nuts] HP-117A

J. Forster jfor at quikus.com
Tue Jul 2 12:39:46 EDT 2013

When WWVB changed to BPSK, the phase-tracking receivers were rendered

Paul Swed has a tested design for a Costas Loop receiver front end and
demod that properly tracks the BPSK carrier phase and routes it to a 117A
or similar receiver.

There are also some hacks that, knowing the time, invert the WWVB signal
phase, in sync with the data, but no product that I know of.



> Are there any tricks to getting a HP 117A to lock to the current WWVB
> transmissions.
> I have read the thread for the Spectracom receivers.
> Will this work with the 117A?
> Thanks
> 73
> Glenn
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