The trick is that the antenna has to already be integrated into the 
module so you get FCC cert without testing?

You were looking for 915Mhz but the Microchip part is 2.4Ghz.
If frequency isn't important can you use something in the 433Mhz range 
like a garage door opener without the encoder chip?
Since data is uni-directional how do you account for lost packets?

thanks
chuckc


On 7/8/2010 4:42 PM, Harold Hallikainen wrote:
> I need a one way RF link. I'm considering use of 915MHz, but I can not
> find any transmitters with FCC modular transmitter certifications
> (http://louise.hallikainen.org/FCC/FccRules/2010/15/212/ ).
>
> Section 3.1 of http://ww1.microchip.com/downloads/en/DeviceDoc/70329b.pdf
> states that the MRF24J40MA has certification as a modular transmitter.
>
> I COULD go Zigbee all the way, except that the "receivers" would generally
> need to transmit back to the "transmitter" where the data originates.
> Section 3.1.1 of the datasheet requires the antenna be 20cm or more away
> from people. This disallows a handheld or portable "receiver."
>
> So, what about the possibility of operating one MRF24J40MA as a
> transmitter and multiple MRF24J40MA modules as receivers where the
> receivers NEVER transmit? Has anyone tried anything like this? Is it a
> good or bad idea?
>
> THANKS!
>
>
> Harold
>
>
>    

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