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Re: MR2400 (was Re: CF and 900MHz)

 From: Lee Adamson <>
>R. Paul McCarty wrote:
>> Has anyone seen the new class of cordless phones that operate in the
>> 2.5GHz range? They claim to have operating distances of up to a mile
>> (outdoors I believe).  I forget where I saw an add for one.
>
>IMHO, at $75 each, this is a groovy thing.  The range isn't all that
>great, but I'm sure they can be hacked. :)  Am I correct in my
>understanding that as long as you're below 1 watt, you're safe from the
>FCC?  The power output of the biggest one is 100mW- I'd say you could
>maybe bump it up to 500 and nobody'd notice...
>
>From http://www.aerocomm.com/oem.html ...
>-------
>MR2400 Family of 2.4 GHz Frequency Hopping Spread Spectrum Radios 

If you wouldn't mind settling for a lower bandwidth (and thus cheaper and
less power consuming) solution, check out http://www.linxtechnologies.com/

If you want to do off-the-shelf 2-way rf, their HP series TX/RX pair
run at 900MHz, on 2.7 to 16VDC, use 14-17mA (tx), 18-24mA (rx), and
cost for each is $23.80tx and $34.88rx. Data rates are upto 50Kbps, and
there's an analog audio mode as well (didn't someone just say they were
looking to do this?).  They also claim range upto 0.25 miles.

What also just got me thinking is someone mentioned having output
redirected to the nearest convenient display.  So, if you were driving
in the car and had taken your monocle off, output would either
automatically be routed via voice synthesis to the car stereo, or to a
dashboard display.

This could also be extended to a PADD like text-only device (or even a
graphic device) but the padd itself would be a buffer, nonintelligent.
It would store whatever you sent it, and allow local scrolling, but
that's it.  Maybe allow people to download out of it, but that means
2-way communications.  I'm thinking this could be an interesting use of
one pair of linx technologies' tx/rx modules.  Cheaper to implement
one-way communication than bidirectional.  However, at this point you
might consider using irda.

   - Kevin Wang

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