Return to KLUBNL.PL main page

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

LF: AW: JT9-2 and JT9-5 mode application: shown S/N values

from [Marco Scholz] [Permanent Link][Original]
To: <[email protected]>, "'Rik Strobbe'" <[email protected]>
Subject: LF: AW: JT9-2 and JT9-5 mode application: shown S/N values
From: "Marco Scholz" <[email protected]>
Date: Fri, 9 Nov 2018 21:58:22 +0100
In-reply-to: <[email protected]>
References: <[email protected]> <[email protected]> <[email protected]>,<[email protected]> <[email protected]>
Reply-to: [email protected]
Sender: [email protected]
Thread-index: AQMHUHIHtxH0wrL+qPPgxSD0ZwQqswKDw74MAPQnRy0CLy/ATQK+Xb6hop8QsFA=

Hello Rik,

Software works fine for me (only minor things like could not save settings when closing prog). Tried on MF a JT-2 transmission without any issue.

Thanks for your effort.

 

Vy73

Marco

DD7PC

 

 

Von: [email protected] [mailto:[email protected]] Im Auftrag von Rik Strobbe
Gesendet: Freitag, 9. November 2018 19:46
An: [email protected]; [email protected]
Betreff: LF: JT9-2 and JT9-5 mode application: shown S/N values

 

Dear all,

 

just a short notice that the shown S/N values are those delivered by the JT9 decoder, not taking the audio conversion into account.

This means that the real S/N values are about 3dB lower (more negative) that shown for JT9-2 and 7dB for JT9-5.

I did some test this afternoon that comfirms this: for JT9(-1) and JT9-2 signal of the same amplitude and added to the same noise the shown S/N values  for the JT9-2 signal were in average 2.7dB higher that for the JT9(-1) signal.

Although the S/N values are "just numbers", what really matters is if the signal decodes or not, I will correct this in the next release.

​

73, Rik  ON7YD - OR7T

 


[More with this subject...]
<Prev in Thread] Current Thread [Next in Thread>
Previous by Date:  Re: LF: 1476 kHz AM, Ian
Next by Date:  LF: Re: AW: JT9-2 and JT9-5 mode application: shown S/N values, Rik Strobbe
Previous by Thread:  LF: JT9-2 and JT9-5 mode application: shown S/N values, Rik Strobbe
Next by Thread:  LF: Re: AW: JT9-2 and JT9-5 mode application: shown S/N values, Rik Strobbe
Indexes:  [Date] [Thread] [Top] [All Lists]