[time-nuts] Spectracom 8170 grief... Watching the problem...

[Burt I. Weiner]

Gang,

I took a look at the WWVB signal using a 1:1 Lissajou signal the same 
way I do for the FMT's. Using a 10:1 scope probe I sampled off the 
output of the pre-amp in the 8170 and fed it into a HP-3586B tuned to 
60 kHz and compared the resultant I.F. against a HP-3336A tuned to 
the 15625 I.F.  Both the 3586B and the 3336A are GPS locked. I won't 
go into the nitty gritties of how I do this, but f anyone's 
interested they can see my FMT Methodology at: 
http://www.k5cm.com/k6OQK%20FMT%20NEW.htm

What I saw was the phase of the WWVB signal shifting back and forth 
180 Degrees coincident with the dips in the carrier. Coincidentally, 
this is what all of you have been telling me, but, just the same, it 
was interesting to watch. The duration of each shift obviously are a 
form of zeros, ones and place holder. I'm wondering if the code used 
to shift the phase is the same code as carried in the legacy system 
where the duration of the carrier dips corresponds to the ones and 
zeros, and the place holder.

Burt, K6OQK

Burt I. Weiner Associates
Broadcast Technical Services
Glendale, California  U.S.A.
biwa at att.net
www.biwa.cc
K6OQK