Speaking of cable TV systems, which is one of our main power line interference
customers in town...
I attended an IEEE meeting this week with a presentation on "Multicasting in
Cognitive Radio Networks" by a PHD college professor from Iowa. It was very
good and pretty technical, and nearly over my head, but the presenter was
basically describing a very efficient wireless mesh type data network system
that would use the unused portions of the TV spectrum (since it would probably
be unlicensed operation).
When I asked if RF Interference issues were analyzed since there would be
possible RFI to and/or from power lines and cable TV systems. He gave me a
deer-in-the-headlights look and said no such analysis had been done. After the
presentation, he approached me with some questions about possible RF
interference, and he seemed amazed there could be such interference. It
clearly had not occurred to him.
73, de ed -K0iL
-----Original Message-----
From: RFI [mailto:rfi-bounces@contesting.com] On Behalf Of W5JR.Mike
Sent: Thursday, December 05, 2013 10:09 PM
To: Anthony (N2KI)
Cc: rfi@contesting.com
Subject: Re: [RFI] RFI in the news
Traditional cable TV systems use the same spectrum above 470 MHz that over the
air broadcast uses. And they are still using the spectrum between channels 52
and 69 that has been repurposed for Land Mobile, Public Safety and cellular.
And the issue goes both ways. Leakage from cable plants are heard by 700 and
800 MHz base stations.
tnx
Mike / W5JR
> On Dec 5, 2013, at 1:05 PM, "Anthony (N2KI)" <n2ki.ham@gmail.com> wrote:
>
> This also happens with Direct TV C31-700 box. FYI
>
>
> Regards,
>
> Anthony (N2KI)
>
>
>
>
>
> On Thu, Dec 5, 2013 at 12:48 PM, Charles Coldwell <coldwell@gmail.com>wrote:
>
>>
>> http://arstechnica.com/information-technology/2013/12/time-warner-cable-tv-goes-blurry-in-presence-of-verizon-lte-phones/
>>
>> --
>> Charles M. Coldwell, W1CMC
>> Belmont, Massachusetts, New England
>> "Turn on, log in, tune out"
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>> RFI@contesting.com
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