[ICOM] Splitting the CI-V data stream

[Jim Hargrave]

Paul,

Some speculation...

If I read your post correctly, it appears that the Amplifier glitch could be
caused by a data collision between the radio data and the computer software
poll. This can cause the amp to momentarily go to neverland. If the software
issues a POLL for freq/mode during the time the radio is sending new freq
data to the amp, then the resulting collision can cause all sorts of errors.
This can also cause an erroneous freq display in the software. It should
settle down as soon as the operator stops making a change to the radio and
the Software makes its next poll. The software should suppress polling while
it is receiving data from the radio, however I'm not sure all programs do
this.

   * 73's Jim W5IFP *
     w5ifp at gvtc.com


   >-----Original Message-----
   >From: icom-bounces at mailman.qth.net
   >[mailto:icom-bounces at mailman.qth.net]On Behalf Of Paul Beringer
   >Sent: Friday, January 29, 2010 15:05
   >To: icom at mailman.qth.net
   >Subject: [ICOM] Splitting the CI-V data stream
   >
   >
   >There is a discussion on the PW-1 reflector regarding an
   >anomaly with the
   >PW-1 flicking to a different band while tuning the radio. The
   >amp returns to
   >the proper band immediately. One person said this went away for
   >him when he
   >rewired his setup so there was just one connection on the CI-V output.
   >Here's the message he sent.
   >
   ><snip>
   >
   >My IC-7800/PW1/PC used to do the same thing. BUT - the problem
   >disappeared
   >when the Rig-to-PC was rewired to use a direct serial port, and the
   >PW1-to-Rig connection was the only thing on the CI-V cable.
   >Coincidence? I
   >dunno, but I'm glad it stopped.
   >
   >(In other words, there used to be a three-way connection on
   >CI-V with Amp,
   >PC, Rig. When changed to a dedicated amp-to-rig only CI-V
   >connection, the
   >problem stopped).
   >
   ><snip>
   >
   >I have the same problem. I split the output two ways. One to
   >the amp and the
   >other to the Microham box. My question is has anyone heard of or seen a
   >device that can cleanly split the data stream without losing freq bits?
   >Thanks
   >Paul NG7Z
   >
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