Return to KLUBNL.PL main page

rsgb_lf_group
[Top] [All Lists]

Re: LF: 500 kHz JT4A

To: "[email protected]" <[email protected]>
Subject: Re: LF: 500 kHz JT4A
From: Rik Strobbe <[email protected]>
Date: Fri, 22 Jan 2010 23:15:54 +0100
In-reply-to: <[email protected]>
References: <[email protected]> <[email protected]> <[email protected]> <[email protected]> <[email protected]> <[email protected]>
Reply-to: [email protected]
Sender: [email protected]
User-agent: Internet Messaging Program (IMP) H3 (4.1.2)

Gary, Jim,

thank you both for the JT4A test.

Gary,

I got no further than a single decode, all others went to Jim ;-)
I must indeed read the manual (although reading a manual can be seen as a sign of weakness ;-) ), but I caught a cold and my head is not into reading serious stuff right now.
Maybe tomorrow ...

73, Rik  ON7YD - OR7T


Quoting Gary - G4WGT <[email protected]>:

Rik,

Thanks for the report & pleased you are getting decodes now.

If you click the mouse on the "Tol" setting box. left click down, right click up, take it down & click freeze, that will freeze the decode bandwidth to a narrower bandpass. But don't forget to click on the wanted signal first. That will exclude any signal from outside that "Tol" setting indicated by the red marker line on the scale at the top.

Read the manual Rik, it seems a bit complicated but you will soon catch on :-))

73,  Gary - G4WGT.


2010/1/22 Rik Strobbe <[email protected]<mailto:[email protected]>>
Gary,

OK, I just decoded you (see previous mail).
But signals are that strong that CW would be armchair copy.
I guess I have to figure out the sync problem (as I understand a good value would be 20 or more). Inituitive I assume that tuning into a signal is done by clicking on the trace, but even if I click on your signal (and see a marker on your freq.) most of the time it is still decoding Jim. Another odd thing: when I decode you you get the same "dB" value (-2) as Jim, while Jim's signal is a lot stronger.

73, Rik  ON7YD - OR7T

Quoting Gary - G4WGT <[email protected]<mailto:[email protected]>>:

Rik,

That will be me on 503.600 kHz. I will put the power up a bit.

73,  Gary - G4WGT

2010/1/22 Rik Strobbe <[email protected]<mailto:[email protected]><mailto:[email protected]<mailto:[email protected]>>>

As said I haven't read any instructions / manual but maybe the figures WSJT7 spits out on the readable copies of Jim may give a clue:
Sync = 9
dB = -2
DT = 0.0
DF = -107
W = 33

73, Rik  ON7YD - OR7T


Quoting Rik Strobbe <[email protected]<mailto:[email protected]><mailto:[email protected]<mailto:[email protected]>>>:

Hello Gary, Jim,

I just fired up WSJT7 in JT4A mode.
I can see a very fat trace at 503.460 that decodes as "TEST M0BMU" and
a little less fat trace at 503.600 that is probably Gary. But even if
I set the marker on 503.600 (1300Hz audio) I still keep decoding "TEST
M0BMU".
It is my first test with JT4A and I haven't read the instructions /
manual, so it is intuitive use.

73, Rik  ON7YD - OR7T

PS: both signals are clearly audible (Jim is S7)

Quoting Gary - G4WGT <[email protected]<mailto:[email protected]><mailto:[email protected]<mailto:[email protected]>>>:

LF,

I will be beaconing WSJT JT4A again this evening & I would welcome
any decodes, I have made changes in view of not decoding a reply
last night. I just need to confirm my outgoing signal before
changing Tx operation to CQ calls.

502.300 kHz USB dial frequency. Tx 503.600 kHz on even minutes.

73,

Gary - G4WGT.


















<Prev in Thread] Current Thread [Next in Thread>