[time-nuts] WWVB and Chronverter update

paul swed paulswedb at gmail.com
Fri Aug 24 01:54:40 UTC 2018


Hello to the group.
Had sometime to hook up the chronverter wwvb simulator.
Numbers of details.
The software and operation are clear.
Everything is easy to setup.
Bad news.
Though the system when set to wwvb puts out a signal on 60Khz its on off
keying.
WWVBs signal is reduced carrier by some 14db.
As such any of the WWVB clocks of quality/phase tracking do not lock and do
not decode.
I have not tried the cheap clocks yet that I suspect will work.
The actual carrier out is a healthy 0 dbm.

Some issues with commands and the system seeming to lock up requiring power
cycles.

With respect to the carrier. The chronverter is elegant in the fact that it
can generate the 60 KHz frequency and other LF signals. But I will need to
add an external 6 MHz oscillator divider and modulator if I want to use it
with the good receivers.
Adds power and complexity.
Regards
Paul
WB8TSL



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