Hi,

A project requires a very low power, low bandwidth, short distance
(10~20m) RF link.

The frequency is open, however minimizing the transmission power,
receiver power, he time to reception from power-up, and getting
consistent range in differing conditions (no strange behavior) are
important considerations. Minimum size is essential.

1)      Any suggestions as to the frequency? I see there are possible
        bands from almost DC to almost IR, with varying maximum field
        strength levels etc. To minimize the size, I'm currently
        thinking of something in the 400MHz range, which will allow
        an etched PCB antenna to be used, and allow relatively
        accurate and inexpensive SAW filters to be used. Comments?

2)      Has anyone gone through the FCC approval process? Cost and time
        estimates?  The testing should be very straightforward for
        a portable device, and FCC claims < 30 days for 90% of applications,
        (the application includes a test report the manufacturer must
        provide) but.. any firsthand knowledge?

Best regards,
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Spehro Pefhany --"it's the network..."            "The Journey is the reward"
speff@interlog.com             Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog  Info for designers:  http://www.speff.com
Contributions invited->The AVR-gcc FAQ is at: http://www.bluecollarlinux.com
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