[time-nuts] Odd HP 117A configuration
Tom Van Baak
tvb at LeapSecond.com
Thu Sep 11 17:59:31 UTC 2008
> Something I've thought about, but not done is to make time decoder based on a
> PIC micro controller. Remember the 117 is only a frequency comparator.
Brooke,
Check the back of your 117A. There's a signal level output so
with clear enough reception you should be able to extract the
1 baud subcode and decode UTC in the same way as other
raw WWVB receivers.
> There is a free PC program that you can feed the audio output from a receiver
> and it decodes WWVB time code. The same company has another program that
> decodes the Northern California DX beacons (as controls the receiver
> frequency). Note the beacons transmit in GPS controlled time slots with
> stepping RF power levels.
>
> Have Fun,
>
> Brooke Clarke
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