The only thing not mentioned in this thread is that you must be in the same band. If Airborne, 72 MHz range (there are also some HAM users that can use some frequencies in the 50 MHz band but I don't know if there are any synthesized dial-a-frequency in that band).

What that means is that if your receiver is airborne use, (72 MHz in the US, not sure what it is in Pakastan) then the transmitter must be in that band. We have channels 11 to 60 here in the US that operate in the 72 MHz band and radio's such as the Polk and JR are all compatible with receivers in that band. If your receiver is 36 MHz, for instance, you must have a transmitter that is capable of dialing up that frequency.

Sorry if this confuses you, but it's important to know if you are going to get a synthesized radio.

DS.

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Armody: I just re-read your post and edited mine accordingly: It appears that you understand this issue but I thought I would keep it here for anyone else that may have a question about that in their mind.