Hi. How big is your camera ?
Also if you are looking to produce these units I would also look at going HD
Can you post a picture of camera
Ok, at this point is better to explain more in detail the "camera" side:
The "head" of the system is composed by a nano cmos camera , with stantard 1 Vp-p cvbs output, 75 ohm terminated, a stainless steel waterproof housing, a led ring, a self levelling mechanism (camera will stay orizontally if body rotate due to an eccentric weight, an RF locator system based on 640 Hz signal and a coil antenna, a slip ring 4 way contact (for endless rotation possibility ).
External dimension are 42 mm diameter and 60 mm lenght
Camera body and lens are 12x12 mm square and 20 mm lenght , fixed focus fixed zoom
Electric circuit is slitted in 3 round PCB, front led PCB and locator PCB that rotate with the camera, and a back plate PCB that connect the head with the cable with a threaded system with 4 pogo-pin , +12v , GND, Video and LED supply variable voltage (to control led brightness ).
The space available for balun is only on back PCB and of course I will loose the LED dimming against the second balanced line for the video, but this is OK for this mod.
there is no way to go HD for different reason, light sensibility, space of the housing and also the "ground" side is already setted for cvbs signal type.
I attach some picture of the prototype, the locator board is not yest pupulated in the picture but actually working.