Hi Domenico, Paul,

 

good decode again from the first transmission which started accurately at 20:00 UT. I only noticed that I had to reduce the frequency offset by half a milliHz compared to earlier tests.

 

Best 73,

Markus (DF6NM)

 

-----Ursprüngliche Mitteilung-----
Von: IZ7SLZ <[email protected]>
An: rsgb_lf_group <[email protected]>
Verschickt: Fr, 23 Okt 2015 9:47 pm
Betreff: Re: LF: Coherent BPSK on LF using EbNaut
 

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.    > --     >    >