The Camera CHAPTER 6 during a multicamera production, cameras are connected by an intercom, which allows the camera operator to speak with the director and anyone utilizing the camera operator's chan- nel. the intercom is usually connected using the camera control unit (ccU). 117 6.16 POWER Video cameras normally require a low-voltage direct current dc power supply. this power gen- erally comes from an on-camera battery (which is dc) or an alternating current (Ac) adapter that converts Ac to dc. camera operators gen- erally carry multiple camera batteries. there are other power options, including battery belts and special power supplies. when using batteries, there are a number of precautions you should take to avoid being left