[linrad] Re: MAP65 version 0.8

[Joe Taylor <Princeton.EDU; joe@xxxxxxxxxxxxxxxx>]

To: MAP65 users
From: K1JT

I have made a few additional tweaks to the MAP65 v0.8 code. 
 The most significant one is to add a routine to 
automatically compute the best-fit value of Dphi for your 
station.  You should follow the instructions given in my 
message of yesterday:

> MAP65 now provides a means to determine the phase difference
> between channels.  Find an EME signal that produces roughly equal 
> signals in the X and Y channels.  Set the QSO Frequency and DF to this 
> signal, and reduce "Tol" so that no other signals will be decoded; then 
> click "Find Delta Phi" on the Setup menu.  MAP65 will decode the signal 
> 13 times in quick succession, using assumed values of Dphi = 0, 30, 60, 
> ... 360 degrees.  The resulting output in the main text window should 
> look something like this:
>
> Freq  DF Pol  UTC   DT  dB  Decoded message      KV  DS Dphi
> ------------------------------------------------------------
> 110   -9  60 0746  2.1 -19  LX/PA3FPQ W0HP         1 204   0
> 110   -9  74 0746  2.1 -20  LX/PA3FPQ W0HP         1 173  30
> 110   -9 108 0746  2.1 -20  LX/PA3FPQ W0HP         1  53  60
> 110   -9 121 0746  2.1 -19  LX/PA3FPQ W0HP         0  17  90
> 110   -9 124 0746  2.1 -18  LX/PA3FPQ W0HP         0  11 120
> 110   -9 124 0746  2.1 -18  LX/PA3FPQ W0HP         0  11 150
> 110   -9 120 0746  2.1 -19  LX/PA3FPQ W0HP         0  17 180
> 110   -9 106 0746  2.1 -20  LX/PA3FPQ W0HP         1  58 210
> 110   -9  72 0746  2.1 -20  LX/PA3FPQ W0HP         1 177 240
> 110   -9  59 0746  2.1 -19  LX/PA3FPQ W0HP         1 204 270
> 110   -9  56 0746  2.1 -18  LX/PA3FPQ W0HP         1 203 300
> 110   -9  56 0746  2.1 -18  LX/PA3FPQ W0HP         1 203 330
> 110   -9  60 0746  2.1 -19  LX/PA3FPQ W0HP         1 204 360
>
> Use the DS "quality factors" (next-to-last column) to find your best 
> value of Dphi.  You can see that for my system it is about 310 degrees.

The program now displays the following line after the ones 
shown above:

	Best-fit Dphi = -46 deg

Of course, -46 deg phase shift is equivalent to +314 deg.

I plan to put MAP65 v0.8 on the WSJT home page later today. 
 As usual, feedback and bug reports will be much appreciated!

Also: I have made some minor modifications to Linrad 02-34 
that make it more "MAP65 friendly".  Version 02-34a blanks 
the Linrad waterfalls during your Tx periods and displays 
the selected "QSO frequency" using the conventions of JT65. 
 If you are interested in these changes, I will be happy to 
the code available.

	-- 73, Joe, K1JT

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