Re: RF white paper

[nobody@xxxxxxxxxxxx (Dave Houston)]

I believe they gave the figures for free space and stated that the 25dB
figure was for the typical indoor environment. There were studies done at
Ohio State which gave much the same averages.

I doubt that Echelon would enthuse other PLC technologies but, aside from
being "field tested", I think their conclusions probably apply to Insteon
and UPB.

"RF Dude" <post@xxxxxxxxxxxxxxxxx> wrote:

>The 25dB attenuation value may be true for certain types of walls or
>materials, but should not be attached to distance (which could be free
>space).
>
>I recall one site I tested where the plate glass doors in some underground
>mall entrances were worth 25 dB of attenuation.  When the doors were open,
>900 MHz signals would pass and cellular service worked on the other side.
>As the doors closed, the calls would drop.
>
>The white paper does outline the difficulties with RF in a chaotic,
>uncontrolled (unlicensed) environment.  Their symptoms described are
>important to many unlicensed bands.  Do you really want to have Bluetooth
>and WiFi in the same house at the same time?  Buyer beware.
>
>I wonder if their optimism for Echelon would hold true for other PL
>technologies... like Insteon... etc.
>
>RF Dude
>