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Date: Mon, 12 Jan 2009 21:50:19 +0100
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Subject: Re: LF: RE: RE: WSPR beacon on 136kHz - QRT
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Dave G3WCB wrote:

>Hi Jim, LF.  
>
>Sadly no decodes from M0BMU or DF6NM on 136 last night.
>M0BMU was clearly audible and was showing on the waterfall display.
>
>I'm using WSPR 1.01_r1023, and it worked fine on 500kHz the other day.
>
>Am I doing something wrong? (well, yes, obviously, but what!)
>
>73, Dave G3WCB IO91RM
>  
>
Hi Dave , LF
as other already  said  both the time (pc clock)  and frequency  must be 
properly adjusted although  using this mode
on other bands i've noticed that   at the time when the  trace of a 
signal was not entirely, say, horizontal
 i.e.  there was some freq. 'floating' over the 2 min period i still 
got  positive decoding .  the wspr software  is primarily used  for the 
beacon mode
( or TX'ing). The receiving  abilities are somewhat  'stiff '  or simply 
there are not so many options you could play with.  the point is that 
you see the signal AFTER it was received  and sometimes it takes more 
than few seconds  to make the decoding process
i suggest to download the recent version of wsjt  - 7.02  where among 
others, there is also an option for wspr as  the qso mode , however , 
you can  use it for only
receiving purposes - simply do not mark the "auto is on" box  clik on 
the 'monitor'  button and you will receive wspr messages transmitted 
either  by wspr soft or wsjt package.  Of course, at first you must 
check the wspr mode it the "mode" option. when you  run the wsjt program 
it also opens the specjt window which is of a great help when it comes 
to the receiving the signal  - primarily you can  observe the signal all 
the time during the 2 min tx period  - you have ( at the bottom of the 
specjt window) 'buttons' for changin the  brightness, contrast and 
digital gain.   also, in the main wsjt window, there is a TOL button 
and  when you play with it using left or right mouse clicks you can  
narrow or extend the built in filter ( the green mark  in the upper part 
of specjt window)  click the mouse button and observe the widening or 
narrowing the tiny green line . also looking  at the shape or  'width' 
of the signal line you can adjust  the strenght of your signal from your 
receiver coming into the sound card   may be  those few remarks will 
bring some help...
                                                                                                                 
73, peter, sq7mpj
qth: lodz, poland /jo91rs/