... CCTV transmitting channel test PTZ controller 3.5 inch CCTV Model :STest -894 with digital multimeter and PTZ controllerDetailed ... test.DC12V power outputAudio inputAdjustable brightness, contrast, color of LCDVideo Level testing, video signals measured in IRE or ... generator, transmit/receive colorful imagesSupport more than twenty kinds of PTZ controller protocols. For example, PELCO-P, PELCO-D, ...