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[ct-user] CT939 band control problem

To: <ct-user@contesting.com>
Subject: [ct-user] CT939 band control problem
From: Ken Wolff" <K1EA@contesting.com (Ken Wolff)
Date: Wed, 17 Feb 1999 08:12:34 -0500
I am not seeing the symptom on my 781. When I change bands with ALT F2,  VFO
A is written, them VFO B, then the 781 reports its band change, and the CT
changes the bandmap etc.

- Ken

***************************
Ken Wolff  K1EA
K1EA@contesting.com
***************************

-----Original Message-----
From:   owner-ct-user@contesting.com [mailto:owner-ct-user@contesting.com] On
Behalf Of Ron Stordahl
Sent:   Wednesday, February 17, 1999 12:11 AM
To:     ct-user@contesting.com
Subject:        [ct-user] CT939 band control problem


My configuration is to use COM2 for rig control and COM1 for TNC.  Radio is
ICOM781.

Lets say I am on 40 and radio and CT are in agreement on this.  If I enter
ALT-F2 to switch to 20 what happens is that the radio switches properly to
20, but the display in CT switches to 20, then back to 40, then back to 20
where it stays.  Now if I enter ALT-F1 to switch back to 40 it properly
switches the radio to 40, but CT displays first 40, then 20, then back to
40.  While this is occuring the band map follows the same pattern.

Surprisingly if instead of COM1 for TNC I use the DRSI interface instead,
then everything works, both the receiver and the indication of the band in
CT switches just once.

I do not use antenna switching from the parallel port, but I suspect that if
I did it would also oscillate between the two bands, which would be quite a
nuisance.

I don't think this problem existed in revision 9.37 or 9.38.

Ron N5IN



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