Re: LF: K3RWR LF EbNaut in CT

[DK7FC <selberdenken@posteo.de>]

Congrats to Rob for the good start! A good challenge for us here in EU.

Unfortunately i forgot to set up the SL instance on the other frequency, so i can not look for decodes. Also my PC suffers from much more soundcard glitches sincei installed windows updates some months ago. Will remove them again!
My LF RX is still running on the old-fashioned method using a GPS locked 10 kHz ref signal to correct the soundcard drift, so it is not immune against soundcard glitches. Need to update that hardware to use 1PPS+NMEA instead.
In a few days i'm ready...

I bet that Markus and Domenico will decode the message...

73, Stefan

Am 23.03.2018 23:01, schrieb Markus Vester:

Hi Rob,

congratulations to Jay and you for the successful experiment!

I've started another SpecLab instance which is monitoring your frequency. Best chances to Eu are probably between 1 and 5 UT. Hope you'll be able to run max power soon - every little dB will be needed!

Good luck,
Markus (DF6NM)


-----Ursprüngliche Mitteilung-----
Von: Rob Renoud <k3rwr@md.metrocast.net>
An: rsgb_lf_group <rsgb_lf_group@blacksheep.org>
Verschickt: Fr, 23. Mrz 2018 21:23
Betreff: Re: LF: K3RWR LF EbNaut in CT

Jay,

Thanks for confirming that my current setup is actually getting out with a message that can be decoded! I’ll continue transmitting this message over the weekend to test out everything in the tx chain. Have reduced output power by 3 dB while looking for any hot spots that may develop with the 100% duty cycle.

Rob - K3RWR

> On Mar 23, 2018, at 13:55, "jrusgrove@comcast.net" <jrusgrove@comcast.net> wrote:
>
> Rob
>
> Here is the decode with correct time offset ... doh!
>
> Jay W1VD
>
>
> ebnaut-rx V0.8
> input file C:\EbNaut\K3RWR\03231544.wav
> sample rate 2.314817 per second
> rx frequency 800
> file start time 2018-03-23 15:29:57.560
> polynomial 8K19A
> crc size 24
> number of chars 5
> block size 54
> symbol period 3.000
> number of symbols 576
> start offset 4.168
> freq offset 0.000000
> cores 2
> list length 2000000
> skipped 4.319996 seconds to start
> initial reference phase -5.6
> ---------------------------------------------
> found K3RWR
> list rank 0
> reference phase 0,0,0,0
> carrier S/N 42.83 dB in 578.7 uHz, 10.45 dB in 1Hz, -23.53 dB in 2.5kHz
> carrier Es/N0 15.22 dB
> carrier Eb/N0 28.28 dB
> info bit period 60.63 seconds
> symbol error rate 0/576 = 0.000 %
> Shannon capacity 6120.1 bits/hour
> Shannon efficiency 1.0 %
> symbols file C:\EbNaut\K3RWR\03231544-symbols.csv
> elapsed 2 seconds
> <K3RWR032318.png>