AA1A QSW UK WSPR QRSS window 503.900 +/-
Last night saw strong CW beacon on 503.950 separated by long dash but was
not able to copy ID by ear...
TNX
----- Original Message -----
From: "Rik Strobbe" <[email protected]>
To: <[email protected]>
Sent: Saturday, February 21, 2009 4:51 PM
Subject: Re: LF: Ultra pico-low-power WSPR beacon
Andy,
I am monitoring and uploading eventual spots.
I will leave the RX / PC on overnight, so whoever want to give it a try ...
73, Rik ON7YD - OR7T
Quoting Andy Talbot <[email protected]>:
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
Disclaimer: http://www.kuleuven.be/cwis/email_disclaimer.htm
|
