I will be radiating a low power (about 4 watts RF, 1mW ERP) test
transmission this evening (Saturday) using 30s BPSK with the transitions
locked to GPS plus a few microseconds. The data sequence is 8 bits long and
synchronised to the hour, repeating every 4 minutes.
The exact frequency is 136718.25Hz (to do with DDS resolution using a 5MHz
clock). Accuracy is within 3*10^-10 which means that during the 4 minute
sequence interval, absolute phase should drift by no more than 4 degrees.
No prize, but kudos, to the first person to work out the data sequence. To
resolve the phase ambiguity problem, assume the first bit sent at the
reference point is a '0'
Andy G4JNT
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