[CQ-Contest] CT-17 Problem

VR2BrettGraham vr2bg at harts.org.hk
Sat Sep 10 16:59:13 EDT 2005

Might be easier to prove KU8E's new CT-17 is working...

Disconnect CT-17 from everything but computer.  Fire up
computer with terminal program, talking to COM port CT-17
is connected to.  Turn "echo off".  Baud rate, parity, stop
doesn't matter.  You should see what you type.  Turn
baud rate down a bit (say 110 or 300) & you can even get
some wiggle from a volt meter across the CI-V bus.

Then reconnect to rig, make sure CI-V addresses are
set correctly, same baud rates, etc.  The addressing is
likely to be tripping you up.  Unlike others, with ICOM all
the rigs are on one bus - it isn't simply plug & talk as
there is only one radio on the other end... despite there
being only one radio in your case.

Physically, ICOM doesn't play silly buggers with DCE/DTE,
so no need for funky cabling like Yaesu.

Logically, the "transceive" function can cause the radio
to talk on its own & if the application on the computer doesn't
expect this (because of not doing CI-V fully), this can result in
collisions on the bus that make things appear not to work, or
intermittently not work.

73, VR2BrettGraham

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