[time-nuts] Looking for 468-DC GOES receiver info

Tom Van Baak tvb at leapsecond.com
Fri Feb 18 05:26:14 EST 2005

> If I could find some information on the details of the Manchester-coded
> 100bps stream, I could read it myself with an oscilloscope from the
> 486-DC test points I've already found and get a very low-level answer
> on the time code status.


I can scan a couple of pages or ship you a spare
copy of the whole 468-DC manual. Meanwhile,

Manchester code:

Here are some NIST papers on GOES time format
and receiver design:

  Satellite controlled digital clock system

  Satellite controlled clock

  NBS Time Via Satellites

  NBS Time to the Western Hemisphere by Satellite

  Time From NBS By Satellite 

Attached are two traces of three 468-DC test points
of interest:
ch1 = TP3 (raw Manchester code from the satellite)
ch2 = TP4 (output of data integrator)
ch3 = TP5 (100 Hz sample clock).

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