regarding transmitter and reciever
 

im currently doing a proj a the TX and RX and i am looking into the 2.4GHz spread spectrum technology, i have some question regarding this freq....

what is centre freq of 2.4Ghz?
what is the bandwidth of 2.4Ghz?

does anyone know which country is spektrum, JR and futaba manaufactured or assemble in???

i have some questions regarding the TX and RX, i have a few models on hand and have questions regarding the

transmission power
range
receiver sensitivity

on these models
Spektrum/ DX6i with AR 6200
Spektrum/ DX7 with AR7000
JR/ DSX9 2.4G
Futaba/ 10C

Airmod
ASSAN / X8J 2.4ghz JR Module
Xtreme power system/ 2.4Ghz JR combo pack