[ICOM] CIV connection

[H Stang]

I am glad you were discussing this as I have two Ameritron amps to my 
746pro's using Ameritron 704's(keys/voltage safety etc) thru the Acc#1.  I 
wondered about running two or three connections to the Acc#1 if it would 
collide /oppose with each other.

 I also have the Icom CT-17 in line for the two Pro's.

I thought it would create a problem. I have no technical support for that, 
just a gut feeling.

I think I can use the 704's without the Acc#1. This has to do the a rtty 
setup using wiring on Acc#1 to get to a FSK mode of  operation thru my 
computers setups.

 I always enjoy these discussions as you never know when good or helpful 
info comes your way on a similar or direct project.  Have great weekend.

Hal Stang
WD4MDA
Hellschrieber #: FD 2599
wd4mda at comcast.net
Jacksonville FL
----- Original Message ----- 
From: "Larry Winslow" <larry_w at comcast.net>
To: "ICOM Reflector" <icom at mailman.qth.net>
Sent: Friday, January 29, 2010 12:18 PM
Subject: [ICOM] CIV connection


This situation might be explained by considering the technology that
Icom uses for the CIV connections.

When there is a "splitter" as you describe, the thing to be remembered
is that the conjunction point is simply wired in parallel. This means
that if more than 1 device communicates at the same time, there is a
high probility that they will "collide" - that is the 2 data streams
impact each other & the data stream is corrupted. This is by design &
it's the responsibility of the receiving device to detect this & to send
another request to the sending device asking for the data once again.

It seems to the me that the PW-1 is receiving the corrupted data,
flickers, then requests the data once again and gets a clean response. I
have no idea what the fix might be other than eliminating the splitter
as was discovered.

I hope this helps.

73 - Larry WØNFU
Lake Forest Park, WA
larry_w at comcast.net

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