[time-nuts] Leap Second Plans

John Ackermann N8UR jra at febo.com
Fri Dec 30 15:00:20 EST 2005


Hope everyone's getting ready for the big event.

If all goes well, I'll be recording serial streams from a Z3801A GPS and
a Spectracom 8170 WWVB clock.  I'll also be recording audio from WWVB on
60kHz, CHU on 3390kHz, and if things work out, WWV on 5 or 10MHz (I have
a tested setup for recording two audio channels, but the third requires
some improvisation...).

John

PS -- I am surprised at the good quality of the WWVB signal.  I'm using
an "AMRAD" LF active probe antenna with a low-pass filter to block out
the local AM broadcasters.  The antenna feeds an HP 3586C selective
voltmeter using either 20 or 400Hz bandwidth.  The audio output of the
3586 goes into a sound card and is processed by the Baudline spectrum
analysis software.  The signal is in the -80dBm range and it's easy to
see the modulation in a waterfall spectrogram.




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