| 摘要 |
<p>A television production system (12) provides both signaling and power over a single coaxial cable (30) between a television control station (14) and a remote camera station (16). The control station (14) includes a power delivery unit (34) for coupling with the coaxial cable (30) for delivering D.C. voltage and current along with signaling over the coaxial cable (30). The camera station (16) includes a power receiving unit (76) which receives power from the coaxial cable (30) and delivers it to the television camera (18) and other camera station equipment (18, 20, 22, 24). The receiving unit (76) also monitors the received voltage and provides a power status signal representative thereof over the cable (30) to the power delivery unit (34). The delivery unit (34) controls the delivered voltage in accordance with the status signal in order to maintain the received voltage at the camera station (16) at a desired level in order to compensate for cable voltage drop.</p> |
