LF: Ultra pico-low-power WSPR beacon

[Andy Talbot <andy.g4jnt@googlemail.com>]

Just for a bit of novelty, I'm running probably the lowest power WSPR
signal seen on this band.   Frequency 503.87kHz (set the usual USB
carrier 502.4) RF power is -2dBm, so ERP is in the region of -27dBm.
Duty cycle 33% (well, actually, 34.375%, but who's counting)

Judging by some of the WSPR reports on my signal when runing 100 Watts
in the past, a few local stations may just be able to decode it.

As for PN sequences, I admited defeat and just wrote down a series of
ones and zeros then played with them till they looked right and had
the correct numbers of each in a  32 bit pattern (which is why 33% and
20% duty cycle values aren't spot-on)
On the assumptuin that its not random at all, why try to generate
other than by eye?

Interesting to know Joe had a similar headache over this issue, Scott.
 Clearly it isn't a 'mountain out of a molehill' problem after all.


Andy  G4JNT
www.g4jnt.com