Hi John,

Do not feel lonely, I am searching for the official PPM and PCM RF =
protocols on the web for the past few weeks ( on and off) and came up =
with basically nothing. I think the Internet is fast becoming a =
information junkyard and you have to be a search profesional these days =
to get any data on the web. There is just too much info out there to =
absorb and work through to actually get the info you want. I think they =
should now get search engines that searches search engines in a tree =
like manner to get you the data you want:-)

I am using google , but is there any other better search engine out =
there, yes there is millions , but I mean one that intelligently =
searches for data you need.

Sounds like a nice project:-)  =20

Regards

Nic Scheepers

> -----Original Message-----
> From: Paul Hutchinson [mailto:phutchinson@IMTRA.COM]
> Sent: 08 November 2002 16:33
> To: PICLIST@MITVMA.MIT.EDU
> Subject: Re: [EE]: US ISM band rules ?
>=20
>=20
> I just finished getting approvals for a 916.5MHz telemetry=20
> system. The 902
> to 928 MHz band allows for continuous transmission making it=20
> popular for
> cordless telephones and telemetry.
>=20
> There is a severe restriction on transmission duty cycle in=20
> the 410 to 470
> MHz band.
>=20
> In any case the regulations for intentional radiators are=20
> complex. I suggest
> you start building a relationship with a local test=20
> lab/compliance firm.
>=20
> Check out these FCC publications for more information:
> OET Bulletin No. 61
> OET Bulletin No. 63
>=20
> Paul
>=20
> > -----Original Message-----
> > From: pic microcontroller discussion list
> > [mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of John Walshe
> > Sent: Friday, November 08, 2002 6:58 AM
> > To: PICLIST@MITVMA.MIT.EDU
> > Subject: [EE]: US ISM band rules ?
> >
> >
> > Hi guys,
> >     I've just spent a lot of time this morning on the FCC=20
> website simply
> > looking for the frequency allocation table for the ISM=20
> bands (really just
> > the 915MHz) and the rules appertaining to the usage of the=20
> band. "A needle
> > in a haystack" only barely describes my experience!
> > Now I did manage to track down the Part15 document which gives some
> > information, but I'm nowhere near having it all. I vaguely
> > remember someone
> > on the list referring to transmission time duty cycle
> > restrictions in these
> > bands, so I know there is a lot more to be found.
> > Can anyone point me to the correct documents for what I need.
> > All comments are welcome (even flames about not searching=20
> properly !).
> >
> > Still in search mode
> > Slan
> > John
> >
> >
>=20
> --
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>=20
>=20
>=20

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