Contact your local cable company, and ask to talk to their engineer. You may
have problems getting him to come to the phone, but I would imply that if
they don't want to talk to you, that you would call the FCC because their
cable system has leakage in excess of 20 MV per meter (that is the most that
they can leak). Drive around your area with your 2 meter radio on 145.25 (if
a standard system) or 145.00 ( if HRC system) and record any signal (level
EX S9+10) and the address where you are picking up the signal. Sometimes the
cable leakage can come from a crack
in the cable, a poor install, or a cable customer who has their cable and
their TV ant. hooked up at the same time. For the past 15 years I have done
Cable System FCC proof of preformance testing, and I have found most systems
with major problems. If your local cable system has not activated the return
path (5/40 mhz) they will have more leakage in the foward path. When they
activate the return, cracks in the cable cause a lot of noise that can
bother the cable modems talk path. This noise problem causes the cable
company to clean up their act (not for your, but for them) so that they can
market a product, without having a lot of customers complain. I had a
cable system call one day because a Ham radio operator was bothering their
return path at 14.2 Mhz. They just did not understand who should move off
the frequency, I also had another customer who set up their return on 27
Mhz.
Cable systems will all ways leak, and they can ( up to 20 mv per meter) and
that is enough to be picked up by most moderen receivers. Bad leaks need to
be fixed, and the cable company won't
know about the problem untill you complain. If they don't fix it, their is
the call to the FCC.
Thanks,
John Elston, W8JDE
It could be a bad install, bad cable drop or a crack. They (the cable
company) need to try and find out where your signal is getting into the
cable system.
----- Original Message -----
From: <[EMAIL PROTECTED]>
To: <[email protected]>
Sent: Thursday, January 01, 2004 4:17 PM
Subject: [Repeater-Builder] Repeater TVI Problem


> My 2 meter link on my repeater is causing TVI. This happens only
> on cable ch 18 on Charter Cable here in Yakima, WA. Any one have
> any ideas? This is only on the houses, say with-in 1/2 mile.
>
> Rod
>
>
>
>
>
> Yahoo! Groups Links
>
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