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Subject Author Date
Powerline modem Gireesh 02-07-2005
| |--> Re: Powerline modem phil-news-nospam02-09-2005
Posted by John Woodgate on February 11, 2005, 6:35 am
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2005:

>You forget that the power utilities aren't setting out to do this to
>become Internet companies, they were looking for efficient ways to
>communicate with their meters (and utility controlled thermostats).

This can be done very well using frequencies below 150 kHz which don't
create huge EMI problems.
>
>Being able to offer and sell Internet broadband access is a nice side
>effect of having the infrastructure.

Not at any price; the emission levels 3 to 30 MHz are 60 dB or so above
those currently accepted. It's very far indeed from a marginal increase.
--
Regards, John Woodgate, OOO - Own Opinions Only.
The good news is that nothing is compulsory.
The bad news is that everything is prohibited.
http://www.jmwa.demon.co.uk Also see http://www.isce.org.uk


NMFall 20%
Posted by Michael on February 10, 2005, 8:49 pm
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Don Lancaster wrote:
(snip)
> Ferinstance, an ancient Diablo 630 printer has such a good noise filter
> that it takes out any X-10 device within 200 feet.
>
> --
> Many thanks,
>

You should try a *new* Diablo. Much better. ;-)


Posted by Ken Smith on February 9, 2005, 2:43 pm
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[...]
>(1) RF transmitter at your meter, "neighborhood" receiver located on a
>pole, then connection to phone lines.
>
>(2) Modem connection between your meter and *your* phone line. Power
>company polls your modem.

I'll add:

(3) An RF responder that is pinged from a truck going down the street.


I know, some places use this for water meters, but I expect that someone
has done it for power meters.

--
--
kensmith@rahul.net forging knowledge



Posted by Jim Thompson on February 9, 2005, 7:59 am
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On Wed, 9 Feb 2005 14:43:24 +0000 (UTC), kensmith@green.rahul.net (Ken
Smith) wrote:

>[...]
>>(1) RF transmitter at your meter, "neighborhood" receiver located on a
>>pole, then connection to phone lines.
>>
>>(2) Modem connection between your meter and *your* phone line. Power
>>company polls your modem.
>
>I'll add:
>
>(3) An RF responder that is pinged from a truck going down the street.
>
>
>I know, some places use this for water meters, but I expect that someone
>has done it for power meters.
>
>--

I'm sure you can find other methods as well. This part of the
industry hasn't yet standardized. Everything still is in 'beta' ;-)

In my neighborhood the "meter reader" plugs a hand-held device into
the meter and records the information, my bill is based on three
rates: off-peak, on-peak and peak demand.

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona Voice:(480)460-2350 | |
| E-mail Address at Website Fax:(480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |

I love to cook with wine. Sometimes I even put it in the food.


Posted by Spehro Pefhany on February 9, 2005, 11:48 am
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On Wed, 09 Feb 2005 07:59:32 -0700, the renowned Jim Thompson

>On Wed, 9 Feb 2005 14:43:24 +0000 (UTC), kensmith@green.rahul.net (Ken
>Smith) wrote:
>
>>[...]
>>>(1) RF transmitter at your meter, "neighborhood" receiver located on a
>>>pole, then connection to phone lines.
>>>
>>>(2) Modem connection between your meter and *your* phone line. Power
>>>company polls your modem.
>>
>>I'll add:
>>
>>(3) An RF responder that is pinged from a truck going down the street.
>>
>>
>>I know, some places use this for water meters, but I expect that someone
>>has done it for power meters.
>>
>>--
>
>I'm sure you can find other methods as well. This part of the
>industry hasn't yet standardized. Everything still is in 'beta' ;-)
>
>In my neighborhood the "meter reader" plugs a hand-held device into
>the meter and records the information, my bill is based on three
>rates: off-peak, on-peak and peak demand.
>
> ...Jim Thompson

http://www.gtiservices.org/amra/amra1/



Best regards,
Spehro Pefhany
--
"it's the network..." "The Journey is the reward"
speff@interlog.com Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com


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