At 06:01 PM 03/13/08, you wrote:
I have seen the emails regarding the noise problems with the LMR type
feedline. What I can't find is any on-line documentation that states the
problems in duplex service and what is actually going on. I personally
know what is going on (dis-similar metals ,foil, braid, etc...). I just
need a document to refer the powers that be so they can have it as a
tool....
I did a quick check on the web with Google and on the Repeater builder
site, but very little info...
Any help would be great..
Bryon Jeffers KØBSJ
See "Recommended Coax and Connectors for the iDEN
Enhanced Base Transceiver System"
at
<http://www.repeater-builder.com/antenna/recommended-coax-and-connectors-for-iden.pdf>
"Motorola Engineering wrote this three page
discussion of cable types, connector types, with
regard to combining, intermodulation, and other
RF performace factors. They concluded that
LMR-nnn and LMR-nnnn series cable is specifically
NOT recommended in radio site RF environments,
especially duplex environments. While iDEN is a
900mhz system the physics is the same at 28 mhz through 1296mhz."
