[RFI] RFI in the news
EDWARDS, EDDIE J
eedwards at oppd.com
Fri Dec 6 16:26:07 EST 2013
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
From: RFI [mailto:rfi-bounces at contesting.com] On Behalf Of W5JR.Mike
Sent: Thursday, December 05, 2013 10:09 PM
To: Anthony (N2KI)
Cc: rfi at 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.
Mike / W5JR
> On Dec 5, 2013, at 1:05 PM, "Anthony (N2KI)" <n2ki.ham at gmail.com> wrote:
> This also happens with Direct TV C31-700 box. FYI
> Anthony (N2KI)
> On Thu, Dec 5, 2013 at 12:48 PM, Charles Coldwell <coldwell at gmail.com>wrote:
>> Charles M. Coldwell, W1CMC
>> Belmont, Massachusetts, New England
>> "Turn on, log in, tune out"
>> RFI mailing list
>> RFI at contesting.com
> RFI mailing list
> RFI at contesting.com
RFI mailing list
RFI at contesting.com
This e-mail contains Omaha Public Power District's confidential and proprietary information and is for use only by the intended recipient. Unless explicitly stated otherwise, this e-mail is not a contract offer, amendment, or acceptance. If you are not the intended recipient you are notified that disclosing, copying, distributing or taking any action in reliance on the contents of this information is strictly prohibited.
More information about the RFI