Return to KLUBNL.PL main page

rsgb_lf_group
[Top] [All Lists]
<prev [Date] next>
[Advanced]
 <prev [Thread] next>

Re: LF: F5WK EbNaut

from [Michel Brunel] [Permanent Link][Original]
To: [email protected]
Subject: Re: LF: F5WK EbNaut
From: Michel Brunel <[email protected]>
Date: Sun, 2 Oct 2016 21:45:55 +0200
In-reply-to: <[email protected]>
References: <[email protected]> <[email protected]> <[email protected]> <[email protected]>
Reply-to: [email protected]
Sender: [email protected]
Hi Markus,

I agree that the 3 second time offset comes from my side. Now I have to understand the reason and make the appropriate correction.
I returned home, and will concentrate on that problem.

73,

Michel - f5wk

Le vendredi 30 septembre 2016 à 10:39:05, Markusvester écrivait :


  
 
Michel,
 
Hi Michel,
 
I believe that RX timing was correct. The clock of the LF grabber PC is controlled by an NTP Client, and my Loran-C grabber is running on the same machine. If NTP had been off by more than a second, the Loran monitor would have jumped to the wrong 1pps pulse and lost the Loran traces.  
 
Best 73,
Markus
 
Von: Michel Brunel
Gesendet: Freitag, 30. September 2016 00:41
An: [email protected]
Betreff: Re: LF: F5WK EbNaut
 
Hi  Markus,

Does this 3second time offset come from my side ?  No intentional change to blame !
Could be a glitch with the VK16E GPS receiver - used only for NMEA, not for the GPSDO.

73,
Michel - f5wk

Le jeudi 29 septembre 2016 à 18:28:48, Markus écrivait :

 Hi Michel,

after I realized that the time offset was now 3 seconds I got a few more decodes. Apparently SNR and condx were a bit weaker than the night before.

2016-09-28  "F5WK IN99EF"

start    symbol carrier df
 UT       EbN0   EbN0   mHz

19:00:03  12.2   14.2   -1
19:30:03  14.7   17.9   -1
20:00:03   1.1    4.3   -1
20:30    (rx interruption)
21:00:03  12.7   14.7    0
21:30:03  13.5   16.6   -1
22:00:03  10.7   13.4   -1

Yes the undefined state of a divider before the PA can cause problems for coherent EbNaut (or Opera) transmissions. With the DDS, you could try to gradually advance the phase in 64 small steps to accumulate 360°.

Best 73,
Markus



-- 
…




-- 
[More with this subject...]
<Prev in Thread] Current Thread [Next in Thread>
  • Re: LF: F5WK EbNaut, Michel Brunel <=
Previous by Date:  Re: LF: Re: Low QRN on VLF!, Markus Vester
Next by Date:  Re: R: LF: IK1HSS - DF6NM WSPR 137 kHz ...errata corrige, Markus Vester
Previous by Thread:  LF: Oct 1-2 Best QRB/reports, Alex R7NT
Next by Thread:  Re: LF: How is possible? / WSJT-X v1.7.0-devel, Markus Vester
Indexes:  [Date] [Thread] [Top] [All Lists]