multiple frequency rf module

[avirajose]

hai,
i am designing a quiz master module to conduct quiz. I have completed a wired module. Now i need to move on to wireless.

As the local rf modules(433.92Mhz) allow only one transmittor at a time. I have decided to make one using nordic rf2401 by setting different frequency for each contestant. so i hope each transmittors operate seprately.
My requirement is to recieve all the transmittors at a time.....

Now my doubt is, can it bedecided for different frequency, it is said its frequency is 2.4ghz.

Is there any module in the market whose frequency can be changed?

 

[BradtheRad]

There are family radio intercoms (walkie-talkie), which can be set for different channels.

I believe the channel setting is remembered when power is off.

This may or may not be the type of thing you're looking for.