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Re: LF: Coherent BPSK on LF using EbNaut

To: [email protected]
Subject: Re: LF: Coherent BPSK on LF using EbNaut
From: IZ7SLZ <[email protected]>
Date: Fri, 23 Oct 2015 21:44:45 +0200
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Good evening Paul, Markus and all,

thank you for your updates.

I will start some EbNaut transmission at 22.00 each hour and hope that Paul can make some measurement on my signal . Qrg is 137502.24 Hz

Initial trasmission at 22.00 will contains 22 characters at 1 s/symbol and will be sent with 100 W power output. Following transmissions will contains 6 characters at 3 s/symbol and should be sent with 10 W.
Coding scheme: 8K19A.

GL.

73, Domenico / iz7slz



On 10/23/2015 7:00 PM, Paul Nicholson wrote:

I have an E-field rx running on the 137 kHz band,
GPS locked.

Here is the 'first light' spectrogram

 http://abelian.org/tmp/lf151023a.png

which covers 137 kHz to 138.5 kHz.

It's a bit shaky, everything held together with
croc clips but hopefully will survive long enough
to pick up an amateur signal or two.

I'm recording 135 to 138.5 kHz.   I reckon the battery
is good for about 60 hours.

Maybe there will be some distant unmodulated carriers
to measure, or even a coherent BPSK message.

137.5 kHz looks quiet here.

--
Paul Nicholson,
Todmorden, UK.
--




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