No. Here are the restricted bands for access BPL – 15.615(f)
(1) Excluded Bands. To protect Aeronautical (land) stations and aircraft
receivers, Access BPL operations using overhead medium voltage power lines are
prohibited in the frequency bands listed in Table 1. Specifically, such BPL
systems shall not place carrier frequencies in these bands.
Table 1. Excluded Frequency Bands
FREQUENCY BAND
2,850 – 3,025 kHz
3,400 – 3,500 kHz
4,650 – 4,700 kHz
5,450 – 5,680 kHz
6,525 – 6,685 kHz
8,815 – 8,965 kHz
10,005 – 10,100 kHz
11,275 – 11,400 kHz
13,260 – 13,360 kHz
17,900 – 17,970 kHz
21,924 – 22,000 kHz
74.8 – 75.2 MHz
Ghery S. Pettit
From: [email protected] [mailto:[email protected]] On Behalf Of
[email protected]
Sent: Tuesday, May 18, 2010 1:16 PM
To: [email protected]
Subject: Re: [PSES] CE Standard for Power Lines data Transmission System
Any similar consideration given to the SWL bands? (49M, 31M, 25M, bands, etc)
_____________________________________________________________________________________
Ralph McDiarmid | Schneider Electric | Renewable Energies Business |
CANADA | Compliance Engineer
From:
"Pettit, Ghery" <[email protected]>
To:
[email protected]
List-Post: [email protected]
List-Post: [email protected]
List-Post: [email protected]
Date:
05/18/2010 12:25 PM
Subject:
Re: [PSES] CE Standard for Power Lines data Transmission System
________________________________
A key reason that you don’t hear complaints about interference to amateur radio
communications in the HF bands from PLC devices is that the HomePlug Alliance
notched the ham bands when they designed their original standard, HomePlug 1.0.
IEEE 1901 also calls for not using the carriers in the amateur radio bands.
As a result, hams have been protected from interference by most in-home PLC
products and can co-exist with them. Problems occurred from “access BPL”
systems using the overhead medium voltage distribution system when they did not
notch the ham bands, or when they did not adequately notch them. And now
Part 15, Subpart G of the FCC Rules deals with these access BPL systems and
places a number of restrictions on them. Certain bands are prohibited to
protect non-amateur radio communications services. Operation in certain
geographical locations is prohibited to protect certain government operations.
These limitations are in place to protect critical users of the HF spectrum.
Please keep in mind that part of the “conflict” here is that incumbent licensed
and government users of the radio frequency spectrum have an expectation that
they will be protected against interference by non-licensed users of the
spectrum. And PLC is a non-licensed user of the spectrum.
Cell phones are great, when they work. Unfortunately, experience has shown
that often when you need them the most, the system gets overloaded and either
crashes or you get locked out so that key users can access the network. And
landline phones can also fail. These are not hypothetical situations, they are
real. So don’t throw out a service that works, even in a serious emergency.
Ghery S. Pettit
From: [email protected] [mailto:[email protected] <mailto:[email protected]> ]
On Behalf Of Mark Gandler
Sent: Tuesday, May 18, 2010 11:53 AM
To: [email protected]; [email protected]; [email protected]
Subject: RE: [PSES] CE Standard for Power Lines data Transmission System
it doesn't stop to amaze me how the group so small can create so much "noise"
regrading BPL/PLC products.
It looks like one of those unique cases where small portion of compliance
community/radio enthusiast rebel against its own.
How come there is no complaints or bad publicity in US? Because it's regulated.
Do you really believe if PLC have interfered with any government or military
communication, it would have remained to operate as is?
Look at 5Ghz spectrum and DFS requirements. Even slight interference with
weather radars resulted in swift regulations updates with either eliminating
certain part of the band or requiring products to comply immediately.
Give me a break. HMMMMMMMM radio with your buddies? what if doomsday doesn't
come? ever heard of the phone, IM? It is nothing personal, sorry for ranting,
but it bugs to keep dealing with those complaints, waste my own and my company
time and resources, even Offcom and they are very sympathetic to our cause.
Stop complaining, put your efforts in changing the standards and regulations.
Or get the cell phone.
> From: [email protected]
> To: [email protected]; [email protected]
> Subject: RE: [PSES] CE Standard for Power Lines data Transmission System
> Date: Tue, 18 May 2010 07:29:03 +0100
>
> I think Gert's analogy of PLC is excellent. If anyone is interested in
> finding out more about problems it can cause please check out this section
> of The EMC Journal http://www.compliance-club.com/default.aspx?id=17
> <http://www.compliance-club.com/default.aspx?id=17>
>
> Cheers
> Alan E Hutley
> Editor
> The EMC Journal
> www.theemcjournal.com
>
>
> -----Original Message-----
> From: ce-test, qualified testing bv - Gert Gremmen
> [mailto:[email protected] <mailto:[email protected]> ]
> Sent: 18 May 2010 6:55 AM
> To: [email protected]
> Subject: Re: [PSES] CE Standard for Power Lines data Transmission System
>
> There is no way of transmitting PLC (power line communications)
> signals at a usable
> signal level without severely interfering with wireless
> HF communications. Why else do you think we invented the
> coaxial cable to "transport" RF-signals ??
>
> PLC has shown to be a mix of conducting and radiating HF
> close field signals with mutual coupling between multiple wire
> sets insuring signal continuity between sender and transmitter.
> At the proposed levels of signal (105 dBuV +) and power line
> density all of the residential areas will be virtually full of noise.
>
> I believe that PLC systems need to be treated as intentional radiators
> (=transmitters).
>
> Distributing HF signals by PLC can be compared with distribution
> of crude oils by the leaking platform in the gulf of mexico.
> The oil will arrive at its destination port ..... once !
> And with the economic advantage of saving oil tankers or
> pipe lines.
>
> Gert Gremmen
> Ce-test, qualified testing bv
>
>
> -----Oorspronkelijk bericht-----
> Van: [email protected] [mailto:[email protected] <mailto:[email protected]> ]
> Namens John Woodgate
> Verzonden: maandag 17 mei 2010 22:18
> Aan: [email protected]
> Onderwerp: Re: CE Standard for Power Lines data Transmission System
>
> In message <5DF40095BBDD4BD1A518F1F8EE4C6440@dell27c5040f40>, dated Mon,
>
> 17 May 2010, John Allen <[email protected]> writes:
>
> >I am surprised we have heard nothing from Mr Woodgate on this issue - I
>
> >think he has very strong views on the whole PLT issue!
>
> My message is already there; you just have to find it!
>
> My 'strong view' is that we **need to be clever enough** to make it work
>
> (because the economic benefits could be very large) while not
> compromising wireless communication in the HF band (because that's
> economically important, too).
>
> What isn't at all clever is to pretend that emissions tens of dB above
> current limits are harmless, and neither is an insistence that those
> current limits are some sort of natural law that cannot be adapted at
> all.
> --
> OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk
> John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK
> I should be disillusioned, but it's not worth the effort.
>
> -
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