[1000mp] CAT control port isolation

[Charles Wooten NF4A]

Looking at the datasheet on your isolator....it requires a straight thru
(pin for pin) cable on one side of the isolator and a null modem type cable
on the other side of the isolator.....maybe you don't have the right cables

Charlie NF4A

-----Original Message-----
From: 1000mp-bounces at mailman.qth.net [mailto:1000mp-bounces at mailman.qth.net]
On Behalf Of John Becker
Sent: Friday, October 01, 2010 3:09 PM
To: 1000mp at mailman.qth.net
Subject: [1000mp] CAT control port isolation

I'm setting up my FT-1000MP Mk. V with a Navigator interface. I've read 
that some users have found the RS-232 chip in the FT-1000 to be somewhat 
prone to failure, so I thought I'd look into an optical isolator for 
protection.

VA3CR's site at http://www.va3cr.net/Interfaces/Optocat.htm has the 
design such an isolator, but I don't have many of the parts and I wanted 
to get this setup operational ASAP, so I looked for a manufactured 
alternative. I ended up buying a Serialcomm - Model ISO-232-3P9.
http://www.rs232-converters.com/converter_specs/ISO-232-3P9.pdf

The radio communicates properly with the Navigator without using the 
isolator, but with the isolator installed there is no communication 
between the two units. Either the isolator is defective, or it's not 
appropriate for this application. Any suggestions? Thanks!

73,

John, K9MM

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