Jay, you could open a second instance with other settings, a larger FFT
input size and a lower decimation factor. Some efforts to do the config
but it's not to late..
73 and TNX for watching
Am 16.01.2019 23:21, schrieb [email protected]:
Riccardo, Domenico
Deja vu ... seems like we've been
here before ...
The receiver / SpecLab was set up
earlier in the day to receive Stefan's transmissions on
137.545. Unfortunately, both of your announced frequencies are outside
the passband in the current setup ... which is approximately +/- 3 Hz.
In the future it would be best if you could stay within 3 Hz. Think
Marcus advocated for 1 Hz separation in the past.
Will be happy to look for your
EbNaut signals another night.
Jay W1VD
-----
Original Message -----
Sent:
Wednesday, January 16, 2019 3:52 PM
Subject:
Re: LF: Re: EbNaut tonite
Hi LF & EbNauters.
Ok, Stefan and Domenico: I'll join you with the
same transmission coding and parameters on 137.535 kHz (message
repeated hourly, 1st on 2100z, last on 0700z).
Reports are welcome.
All the best
73 de Riccardo IW4DXW
LF,
I will transmit a 4 character message with EbNaut
on 137.540 kHz, sym=8s, code=4K19A, CRC=16.
Transmissions will start on 2019-01-16 22.00 UTC with a
duration of 30' 56''; then repeated every hour. Last transmission on
2019-01-17 06:00.
TX setup in use: Paul N. Program 'EbSynth' steered with 10
kHz from GPS, analog SSB exciter with reference oscillator steered by
the same GPS, 'gpds' and 'chrony' programs for controlling the UTC time
of the computer.
Antenna current = 1.5 A, antenna type rev-L 8+8 meters.
Reports are welcome.
73, Domenico IZ7SLZ / JN80nu
Hello Stefan and LF,
Attached to this email there is a folder with the plots of
the eight periods. First two transmissions seems to be affected by
fading.
I want to join your EbNaut session tonight with some
transmissions from my side. I will announce the parameters as soon the
setup is ready.
73, Domenico IZ7SLZ
Hello Rob and Jay,
Many thanks for the reports and all the details. Jay, did you miss the
22 UTC transmission or did it not decode?
Interesting to see the phase plots. It is expected that the phase is
less stable when the band opens. In the last transmission, the Eb/N0 is
not high enough to see the phase pattern.
I wonder if the traces become more evident if 4K19 is used.
What happens when a solar event happens during the transmission time?
Does it change the phase or just the D layer attenuation?
Maybe we can repeat the experiment, using 4K19A. Of course a carrier
could be used too, but i like to 'play' with EbNaut.
So, tonite:
f = 137.545 kHz
Start time: 16.JAN.2019 22:00:00.3 UTC
Symbol period: 8 s
Characters: 4
CRC bits: 16
Coding 4K19A
Antenna current: 4 A
Duration: 30:56 [mm:ss]
73, Stefan
Am 16.01.2019 12:29, schrieb Rob Renoud:
Stefan,
Late start but 7 successful decodes. Have not gotten
to phase plots yet...
| UTC |
Rank |
C
Eb/N0 |
Eb/N0 |
MSG |
Ref
Phase |
| 0100 |
0 |
5.6 |
1.6 |
2019 |
0,-30,0 30 |
| 0200 |
0 |
6.9 |
0.4 |
2019 |
60,30 30 0 |
| 0300 |
0 |
9.9 |
5.8 |
2019 |
90,60,60,0 |
| 0400 |
0 |
11.2 |
8.8 |
2019 |
180,180,150,150 |
| 0500 |
0 |
6.3 |
2.7 |
2019 |
0,-30,-30,-60 |
73,
Rob – K3RWR
Sent: Tuesday, January 15, 2019 9:33 PM
Subject: Re: LF: Re: EbNaut tonite
LF,
Today, the messages will be transmitted as announced, starting 22 UTC
73, Stefan
Am 14.01.2019 22:16, schrieb DK7FC:
PS: Repeatinh hourly, until
including 6 UTC.
Am 14.01.2019 22:13, schrieb DK7FC:
Hi LF,
Just a short EbNaut message tonite. I'm interested to see the phase
changes on a long path. Markus's showrawsyms does a good job there, as
long as 8K19A is used. A shorter message should also help to build up a
clear trace.
So let's try an unusual short message:
f = 137.545 kHz
Start time: 14.JAN.2019 22:00:00.3 UTC
Symbol period: 4 s
Characters: 4
CRC bits: 16
Coding 8K19A
Antenna current: 4 A
Duration: 30:56 [mm:ss]
Reports, including phase plots, welcome :-)
73, Stefan
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