wireless zoom control- help needed

[skydestined 0]

hey everyone!

I have a JR PCM9xII Transmitter and a CCD camera with RS485 interface. The camera supports CNB zoom (9600), Pelco-D & Pelco-p protocols and has an auto-focus feature. I want to control the zoom function of this camera with my JR tx through one of its auxiliary channels. tell me if it's possible and how? From my initial read, i find that i'll need to first hack into the camera zoom function and then build an RC-to-Serial interface to convert RC Signals into camera signals. Please tell me if that's correct and since i'm new to all this rc stuff and thus pretty clueless, your help on how to carry out this task (especially on how to build an RC to serial interface) is highly needed.

Thanx n Regards.