Hi Reino,

 

Thanks for the explanation. That makes sense. Appreciate the information.

 

--Dennis NE6I

 

From: Reino Talarmo via wsjt-devel <wsjt-devel@lists.sourceforge.net> 
Sent: Monday, January 29, 2024 10:24 PM
To: 'WSJT software development' <wsjt-devel@lists.sourceforge.net>
Cc: Reino Talarmo <reino.tala...@kolumbus.fi>
Subject: Re: [wsjt-devel] Decoding Anomaly

 

Hi Dennis,

There may be something to improve in the hash table(s) management as in your 
example the first message CQ PJ5/SP9FIH was sent in full (it is a non-standard 
call, but that should not matter). Why the 10 bits hash was not updated into 
the hash table, but there is DP1POL instead for the 10 bits hash and at the 
same time for PJ5/SP9FIH the longer 22 bits hash it is correct. Of course 
PJ5/SP9FIN and DP1POL don’t collide at the 12 and 22 bits long hashes. 

Well, a simple possibility is that the 10 bits hash table is in alphabetic 
order and the hash values are not updated, but there are two callsigns for the 
same hash and DP1POL is the first found. Sri, I have no fact about the hash 
tables, but in my logic the CQ PJ/SP9FIH message should have ‘updated’ a 
linkage of all hash 10, 12 and 22 values for that callsign and ‘removed’ 
linkage to DP1POL at least for the 10 bits hash for the next messages.

(By the way there are 10, 12 and 22 bits hashes also for SP9FIH in the case 
that were used and those don’t collide with DP1POL.)

 

73, Reino OH3mA

 

From: Dennis Younker NE6I via wsjt-devel 
[mailto:wsjt-devel@lists.sourceforge.net] 
Sent: Tuesday, January 30, 2024 1:59 AM
To: 'WSJT software development' <wsjt-devel@lists.sourceforge.net 
<mailto:wsjt-devel@lists.sourceforge.net> >
Cc: Dennis Younker NE6I <n...@cox.net <mailto:n...@cox.net> >
Subject: Re: [wsjt-devel] Decoding Anomaly

 

Thanks, what would be special about PJ5/SP9FIH in this case? I have not seen 
this with others using “portable designators.”

 

--Dennis NE6I

 

From: Jim Reisert AD1C via wsjt-devel <wsjt-devel@lists.sourceforge.net 
<mailto:wsjt-devel@lists.sourceforge.net> > 
Sent: Monday, January 29, 2024 3:09 PM
To: WSJT software development <wsjt-devel@lists.sourceforge.net 
<mailto:wsjt-devel@lists.sourceforge.net> >
Cc: Jim Reisert AD1C <jjreis...@alum.mit.edu <mailto:jjreis...@alum.mit.edu> >
Subject: Re: [wsjt-devel] Decoding Anomaly

 

It's a callsign hash collision.  DP1POL has not been operating on those 
frequencies.

 

 

On Mon, Jan 29, 2024 at 4:07 PM V. Scott Moore via wsjt-devel 
<wsjt-devel@lists.sourceforge.net <mailto:wsjt-devel@lists.sourceforge.net> > 
wrote:

I saw similar decodes.  I attributed it to two stations on the same frequency.  
The PJ5 was very strong here and when multi-streaming his/her signal came down 

and revealed the less powerful (but still +10 here) Antarctic station.

 

scott

W1SSN

 

On Jan 29, 2024, at 17:47, Carl Moreschi via wsjt-devel 
<wsjt-devel@lists.sourceforge.net <mailto:wsjt-devel@lists.sourceforge.net> > 
wrote:

 

I just saw exactly the same things on 17 meters.

Carl Moreschi N4PY
127 River Moss Way
Hertford, NC 27944
www.n4py.com <http://www.n4py.com> 

On 1/29/2024 5:31 PM, Dennis Younker NE6I via wsjt-devel wrote:

Wondering if anyone else is seeing this issue. PJ5/SP9FIH is operating F/H. 
When he is transmitting one stream, his call is displayed correctly in the Rx 
Frequency window. When he transmits two streams, the call sign DP1POL is 
displayed instead.  See below for an example.
--Dennis NE6I
222830  -2 -0.4  492 ~  CQ PJ5/SP9FIH       Saba & St. Eustatius
222900  -4 -0.4  492 ~  N5HD <PJ5/SP9FIH> +02
222930   0 -0.4  492 ~  N5HD RR73; EA7QL <DP1POL> -04
223000  -4 -0.4  492 ~  EA7QL <PJ5/SP9FIH> -05
223030  -2 -0.4  492 ~  EA7QL RR73; LU7EML <DP1POL> -12
_______________________________________________
wsjt-devel mailing list
wsjt-devel@lists.sourceforge.net <mailto:wsjt-devel@lists.sourceforge.net> 
https://lists.sourceforge.net/lists/listinfo/wsjt-devel



_______________________________________________
wsjt-devel mailing list
wsjt-devel@lists.sourceforge.net <mailto:wsjt-devel@lists.sourceforge.net> 
https://lists.sourceforge.net/lists/listinfo/wsjt-devel

 

“Got time to breath, got time for music” - Brisco Darling

 

 

 

_______________________________________________
wsjt-devel mailing list
wsjt-devel@lists.sourceforge.net <mailto:wsjt-devel@lists.sourceforge.net> 
https://lists.sourceforge.net/lists/listinfo/wsjt-devel



-- 

Jim Reisert AD1C, <jjreis...@alum.mit.edu <mailto:jjreis...@alum.mit.edu> >, 
https://ad1c.us

_______________________________________________
wsjt-devel mailing list
wsjt-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/wsjt-devel

Reply via email to