A parallel experience: I am retired railroad engineer with 42 years of
service. When remote control locomotives were first tried on the
Southern Pacific rr in the late sixties-early seventies on the Roseville
Ca, to Sparks Nv mountain distric run, the same overly educated type
gave us the how to's such on the new and can't fail remote locos.
When I brought up in the open discussion session the possibility of
intermod, I was given the same dear in the headlights look much similar
as if I had put a you-know -what in the punch bowl.
After the session was closed, the fellow who have made the presentation
asked me what I knew about intermod, I told him of my ham radio and FM
two-way experiences with the phenomenon, I was told that his company
were hoping that all would work out in that area.
It did/has (so far) in the late nineties prior to my retirement, but I
will say that strange things did occur for no good reason.
Just my similar experience with RF flying loosely about in the air, uh-huh.
Gary...wa6fgi
On 12/6/2013 1:26 PM, EDWARDS, EDDIE J wrote:
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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