Message-ID: <20090221225111.lnqiykdjl20c84kc@webmail4.kuleuven.be>
Date: Sat, 21 Feb 2009 22:51:11 +0100
From: Rik Strobbe <Rik.Strobbe@fys.kuleuven.be>
To: rsgb_lf_group@blacksheep.org
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Subject: Re: LF: Ultra pico-low-power WSPR beacon
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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 <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
>
>



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