Re: [Paparazzi-devel] 900 Mhz or 2,4 Ghz modem (Chris)

[Adam]

If you're outside Europe then 900 Mhz should have more range but the
downside is a slower data rate. Basically the higher the frequency the
more prone it is to noise and attenuation due to obsticals and
distance.

As far as I understand Paparazzi does not require huge bandwidths so
I'd go for 900/868 depending on where you are.

On Friday, April 17, 2009, chris <address@hidden> wrote:
> If you are in Europe you will need either the 868 Mhz or the 2.4 ghz ones.
> The 900 Mhz is allocated to cellular phones in Europe so there might be 
> problems.
> The 900 Mhz do have frequency hopping (Aerocomm)
> so they might get away with interference but i don't know that for sure as i 
> have never used them in Europe.
> The 868 does not use frequency hopping AFAIK.
> If you are located elsewhere (US, Australia etc.) the 900 Mhz is a good 
> choise as is the 2.4 ghz.
> All depend to what RC transmitter and / or video transmitter bands you will 
> use.
> Try and use different bands for each service (RC, Video, Telemetry)
> I use the 2.4 ghz Xbee pro, a 2.4 ghz RC receiver that uses FHSS
> (frequency hopping spread spectrum) and plan to use a 2W 850 to 950 Mhz video 
> transmitter.
> For example Futaba uses FHSS at 2.4 ghz (Futaba FAAST)
> Chris
>
>
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