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Re: LF: EbNaut tonite

from [Domenico IZ7SLZ] [Permanent Link][Original]
To: Alex R7NT <[email protected]>, [email protected]
Subject: Re: LF: EbNaut tonite
From: Domenico IZ7SLZ <[email protected]>
Date: Wed, 23 Jan 2019 18:58:22 +0100
Dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to; bh=i5AFmX4I2pmxeHD3NswngysK3XGiU6qVc4lHgnyVyTk=; b=VvQh7Qzgl9GnDP0Q3znzTb35sefa6ovr00E3Z9w6iUK10Lgl2bmOfR5i0kiJ6Wyzua kWYLuBZPdOS8/FEDz0nQjjrbMxdLd0Lf5slqXFhXTYvr6zx5Gq+qfDRi03aGyGfMIZju 1zvLRmXfaltvTm9amlM24QdcorxBCu2sxUYBRoXEdxH1xuJHOtCXytQkx1ZgDw/Vv0td K7+mdM4JoNMK/WQLDHkVMzW/d7vWiTGNep8v7WxWE8NA+NNhFfiL40v/SW5XRXbFx9PI vnPRppNvTinYnj8rPB4b/quEpWqg8Z27vc0GHMD5LpiysktshR4GI1ia1lnaVkSGpUMO BaSA==
In-reply-to: <CAL-VeePMHsTn=jUWL-ZtR3V9D+UdbgLp9225eVVcLgqggvFKqw@mail.gmail.com>
References: <[email protected]> <[email protected]> <[email protected]> <[email protected]> <[email protected]> <[email protected]> <D0A37FCD090E4DAC97BD3FAA7CD78AD6@Rob64PC> <[email protected]> <[email protected]> <1UTCP1TTXz.GTBnkuWTAJs@optiplex980-pc> <1UTCP1tymN.HCrj4Hc5Ogz@optiplex980-pc> <CANA3B6V7agns9qEkz8W1ownEzgSLN+Tug3-ZC4H6dTLXPvivpA@mail.gmail.com> <8B74554DD9CC447AA7826347ACFA2369@DELL4> <CANA3B6Wp+TYR9WYqfHxVi4rLgHtRF29sAnTUSD4Djk_qJpEN8A@mail.gmail.com> <CAL-VeeOifs30j0xTsdMS7o7ANfZs1TFx=Ubb3iP1CC6Wm2nRLw@mail.gmail.com> <CAC+C6w6Rb5t2UYThJLBDnX4qSVM70YiNaZJK74siOqX5V3Wgog@mail.gmail.com> <CAL-VeeM3eiaBpozKFPNqOd=x6DypOn-CLF0PNEKzbnVgw=psdQ@mail.gmail.com> <CAL-VeePMHsTn=jUWL-ZtR3V9D+UdbgLp9225eVVcLgqggvFKqw@mail.gmail.com>
Reply-to: [email protected]
Sender: [email protected]
Hello Alex, all

first of all, Alex,  i confirm that your email has been reflected.

Catching your message was almost a 'bingo' becouse of uncertainty of the frequency. I have tested in the other hours without results. As you known, EbNaut requires the milliHertz precision. To prove this, i have often tryed to shift the frequency of -only- 1 mHz on the strong signals of IW4DXW and i loose completly the decode.  The Markus' plot often can't help to find the offset if this is larger than 0.5 mHz or if the signal is DX.
EbNaut with a TXCO is possible but only for short periods. In 15 or 30 minutes the drift is (hopefully) not too much, so the signal can be decoded.  So, for now, it should be better if you reduce the no. of symbols or their duration.

I understood that you are in a good way for EbNaut but you need a GPS or Rb to stabilize the QRG . You can easly found on the Bay an used GPS frequency reference (Trimble Thunderbolt or similar) . They provide an output of 10 MHz and you can drive your DDS with this. I found for 80 Euros one Epsilon-Clock 10 MHz.
Once the GPSDO is ok, then you can try OP32 transmissions and check the results on 'The' great Markus' grabber. If your milliHertz's are steady, then your setup is EbNaut ready.

Why "list=10000"? 
Yes, sorry. This comes from previous settings of the auto-decoder just to be sure to search also fo high rank decodes.

Check also PSE:
2019-01-23  1 transmission only from 04:00

no, sorry this is not possible becouse unfortunatly the storage hard disk becomes full yesterday night (around 23.00 UTC) so no more recording after that hour.
I have restarted system this afternoon after 14.00 UTC so i can check for this night, if you will be again on air

73, Domenico IZ7SLZ



On Wed, 23 Jan 2019 at 17:29, Alex R7NT <[email protected]> wrote:
Domenico,
my msgs go very long time or do not reach rsgb_lf_group at all :(
73! Alex R7NT  136.73.ru    AWLF 136.73.ru/h_aw


---------- Forwarded message ---------
From: Alex R7NT <[email protected]>
Date: ср, 23 янв. 2019 г. в 19:14
Subject: Re: LF: EbNaut tonite
To: <[email protected]>


Domenico,
TNX for efforts!
This is right, but I'm not sure abt exact freq and time was from 2019-01-18 21:00 till 2019-01-19 05:00. Why "list=10000"? 
Check also PSE:
2019-01-23  1 transmission only from 04:00
137546.1  N=3 T=8s 8K19A CRC-16 3328.0 s
PSE inform abt the sufficient stability and phase of my EbNaut signal
73! Alex R7NT  136.73.ru    AWLF 136.73.ru/h_aw


ср, 23 янв. 2019 г. в 17:54, Domenico IZ7SLZ <[email protected]>:
Hi LF & Ebnauters,

returning home after a trip, i did a re-play of the recordered audio of last nights.
I got some decoders of VO1NA and plenty of the 'local' stations here IW4DXW and DK7FC.


Riccardo ask for the phase diagrams (show_raw_sym by Markus); i have uploaded plots of IW4DXW, DK7FC and VO1NA in the folder

For a casuality, i got a message with the Alex RN7T parameters in a close frequency:
--------------------------------------------------------------------------------------------
2019-01-19_02:00:00 137544.800Hz N=3 T=8s 8K19A CRC=16 list=10000 sym=416 Duration=3328s
T_OFFSET=0.1s F_OFFSET=0.000Hz
found rank 8326 ber 3.6779e-01 Eb/N0 1.5 M -4.353520036e+00 ph 1 180,180,180,180 [QRL]
found rank 690 ber 3.6538e-01 Eb/N0 1.7 M -4.711310863e+00 ph 3 -150,-150,-150,-150 [QRL]
--------------------------------------------------------------------------------------------
Is the message right ?

73, Domenico IZ7SLZ





On Wed, 23 Jan 2019 at 05:02, Alex R7NT <[email protected]> wrote:
EbNaut enthusiasts,
I start before Sunrise in my QTH (abt 05:00 UTC)

QRG 137546,1 Hz
Coding 8K19A
CRC 8
8 sec./sym.
3 characters
duration 55:28
1st on 04:00 UTC  
73! Alex R7NT  136.73.ru    AWLF 136.73.ru/h_aw


вт, 22 янв. 2019 г. в 22:20, Riccardo Zoli <[email protected]>:

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



Il giorno Lun 21 Gen 2019, 23:03 <[email protected]> ha scritto:
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







Il giorno Lun 21 Gen 2019, 13:20 [email protected] <[email protected]> ha scritto:
Riccardo
 
Corrected decode:
 
0300 Rank 0 car Eb/N0 2.3 Eb/N0 1.4 FBDECODE
 
Jay W1VD
 
 
 
----- Original Message -----
Reply-To: <[email protected]>
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 -----
From: DK7FC <[email protected]>
Reply-To: <[email protected]>
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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