Hi,

Remember though, from earlier on in this thread,  that 433MHz here in
North America is restricted to the amount of time you can spend on the
air and that no continuous or networking type stuff is allowed.  They
could allow 1Kw and it still wouldn't help if you wanted to do a network
with multiple nodes chatting with each other.

John Dammeyer



Wireless CAN with the CANRF module.
http://www.autoartisans.com/documents/canrf_prod_announcement.pdf
Automation Artisans Inc.
Ph. 1 250 544 4950


> -----Original Message-----
> From: pic microcontroller discussion list
> [mailto:PICLIST@MITVMA.MIT.EDU] On Behalf Of Brent Brown
> Sent: Monday, May 20, 2002 2:46 PM
> To: PICLIST@MITVMA.MIT.EDU
> Subject: Re: [EE]: RF modules
>
>
> > >> > > Success with printed circuit antenna over 10m and up to 20m
> > >> >
> > >> > What modules did you use and were they standard legal
> power (1mW
> > >> > 433MHz) if I may ask ? Was it a superregenerative receiver ? (I
> > >> > think not).
> > >>
> > >> Peter,
> > >>
> > >> Have a look at http://www.automicro.com.tw/. The
> receivers are the
> > >> RX4303, the transmitters are TX3314S.
> > >
> > >Further to the above, I have been in the touch with the
> manufacturers
> > >of these devices and they say the TX3314S has about 5mW RF output
> > >power. Here in NZ it appears we are now allowed 25mW EIRP on this
> > >band, (used to be 1mW), not sure about other countries.
> >
> > Aha! That explains a lot. 1mW->5mW is quite a change (4+
> times power =
> > 2*range -> from max 30 meters to 60 meters in the same conditions).
> >
> > This NZ seems to be a mythical country ;-) They are allowed
> four times
> > more than others <g>. What else comes in fourfold portions
> in NZ ? (I
> > hope not taxes <g>)
> >
>
> Yes of course it's a mythical place, but don't tell everyone...we
> like to keep it a secret. Have you seen Lord of the Rings? It's
> exactly like that here. And Start Wars Episode II - who else would
> you clone if you wanted to make the best army in the universe?
>
> Back on topic... the 433MHz band here apparently used to be
> restricted to 10uW, then 1mW, now 25mW. That's a 2500 fold increase.
> >From looking around I think in Europe you can have 10mW. I'll stick
> with 5mW now just in case I ever have to export to Europe, though I
> wouldn't be really excited about all the compliance stuff.
> --
> Brent Brown, Electronic Design Solutions
> 16 English Street, Hamilton, New Zealand
> Ph/fax: +64 7 849 0069
> Mobile/txt: 025 334 069
> eMail:  brent.brown@clear.net.nz
>
> --
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>

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