Riccardo,
I’ll be listening tonight for EbNaut and looking for your carrier during idle periods. Appreciate you giving this approach a try.
Thanks to all for their suggestions and comments.
GL & 73, Rob - K3RWR
Rob, LF & EbNauters
Thank you for all your efforts. Tonite we can try with:
QRG: 137545 Hz Coding 8K19A CRC 12 5 sec./sym. 3 characters no time delay duration: 32 min.
Message repeated hourly, 1st on 2100z, last on 0700z.
Unmodulated carrier from xx:32 to xx:00 minute.
Reports are welcome, as usual.
73 de Riccardo IW4DXW
Riccardo and Jay,
No decodes here either. Had a number of low Rank false decodes also. Suspect the low CRC may have allowed the false decodes. I had similar results during the previous run.
Suggest a shorter character message with a higher CRC with a similar duration. Also, if possible, suggest transmitting the message on the hour and running an unmodulated carrier during the idle period to enable monitoring with ARGO or a similar app. I have found this very useful tool with EbNaut transmissions from VO1NA and K3SIW on 2200m and 185.185... kHz (LoFER) respectively.
73, Rob - K3RWR
Riccardo
Late start last night (0000z). Unfortunately no decodes. There were numerous low Rank false decodes ... not sure what's up with that!
Jay W1VD
----- Original Message -----
Sent: 1/22/2019 2:48:00 PM
Subject: Re: LF: EbNaut tonite
Sorry: message repeated every 30 minutes.
73, Riccardo IW4DXW
Jay, Rob, LF
QRG 137545 Hz
Coding 8K19A
CRC 8
3 sec./sym.
8 characters
duration 29 min. 36 sec.
no time delay
(1st on 1930 UTC, last on 0700 UTC)
Reports are welcome
All the best
73 de Riccardo IW4DXW
Riccardo
Glad to hear you found the problem. Will await your announcement and look for your signal tomorrow night.
Jay W1VD
----- Original Message -----
Sent: Monday, January 21, 2019 4:13 PM
Subject: Re: LF: EbNaut tonite
Jay, Rob, Markus, Stefan, Joe, LF
Jay, thanks again for the decode: congrats for your rx setup.
And thank you so much for trying, Rob.
Here, the TP2 reference signal (not sufficiently filtered) overshot sometimes the quadrature divider (x4) causing that phase jumps. The problem is now fixed.
A new TX EbNaut session is scheduled for starting tomorrow evening.
All the best
73 de Riccardo IW4DXW
Riccardo
Corrected decode:
0300 Rank 0 car Eb/N0 2.3 Eb/N0 1.4 FBDECODE
Jay W1VD
----- Original Message -----
Sent: 1/21/2019 6:53:39 AM
Subject: Re: LF: EbNaut tonite
Stefan, Riccardo & EbNaut-eers
Stefan ... good copy throughout the night. Riccardo ... unfortunately only one decode to report. Markus noted a frequency error ... curious if propagation or NE0-M8T?
137545
2200 Rank 0 car Eb/N0 9.5 Eb/N0 9.2 RADIO GAGA
2300 -
0000 Rank 0 car Eb/N0 9.2 Eb/N0 9.3 RADIO GAGA
0100 Rank 0 car Eb/N0 6.0 Eb/N0 6.0 RADIO GAGA
0200 Rank 0 car Eb/N0 5.3 Eb/N0 5.9 RADIO GAGA
0300 Rank 0 car Eb/N0 6.1 Eb/N0 6.8 RADIO GAGA
0400 Rank 0 car Eb/N0 11.3 Eb/N0 10.4 RADIO GAGA
0500 Rank 0 car Eb/N0 3.7 Eb/N0 4.6 RADIO GAGA
0600 Rank 0 car Eb/N0 10.6 Eb/N0 10.2 RADIO GAGA
137547
0300 Rank 0 car Eb/N0 10.0 Eb/N0 FBDECODE
Jay W1VD
----- Original Message -----
Sent: 1/20/2019 12:48:34 PM
Subject: LF: EbNaut tonite
LF,
Tonite:
f = 137.545 kHz
Start time: 20.JAN.2019 22:00:00.3 UTC (hourly, including 6 UTC)
Symbol period: 1 s
Characters: 10
CRC bits: 12
Coding 16K21A
Antenna current: 4 A
Duration: 24:32 [mm:ss]
73, Stefan
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