Martin Wehner wrote:
>
> Hello Howard-
>
> unfortunately, I do not have the answer to your question.
> I myself have tested RF transmission between PICs and have a few questions
> regarding your setup (if you don't mind):
> -What transmitter/receiver modules are you using?
> -What protocol do you use to transmit the data between the PICs?
> -How far apart can the PICs be currently (w/o ant) for you to reliably receive
> the data?
> -What is the expected range once you hook up the proper antennas?
> -Are your devices FCC compliant? If not, are you planning on getting them
> certified?

- Elsema rx and tx modules (www.elsema.com)
- Own version. rx has data slicer, which demands 50% duty cycle. I'm
trying 300/300uS and 150/150uS for 1's and 0's.  Detection is by
determining length of a hi or lo of the bit (doesn't matter which, as
both are the same)
-I have had them workinbg one way (no antenna switch) over a few yards
with a short wire as an antenna.
-I'm looking/hoping for at least 1000 yards over open spaces.
-the devices are compliant in Australia.
Howard
> If you do have the time, I would greatly appreciate answers to the questions
> above.
> Thank you so much & good luck with finding the antenna switch!
>
>         Martin
>
> -------------------------------------------
> Martin Wehner
>
> e-mail: <martin@cyclotomic.com>
> web:    http://www.cyclotomic.com/~martin
> -------------------------------------------
>
> --
> http://www.piclist.com hint: The PICList is archived three different
> ways.  See http://www.piclist.com/#archives for details.

--
http://www.piclist.com#nomail Going offline? Don't AutoReply us!
email listserv@mitvma.mit.edu with SET PICList DIGEST in the body