The IT-SV1 is a composite video detection sensor, making it ideal for determining the power state of VCRs and DVDs. It provides an ON indication during the presence of a composite video signal of the type found on the back of VCRs and DVDs. The IT- SV1 can connect directly to either "Component Video Out" (the green or Y RCA plug) or "Composite/Line Out" (the yellow or Video RCA plug) found on the back of most video equipment. The IT-SV1's unique RCA "patch" plug allows it to be used in installations without sacrificing the video equipment’s outputs. Simply remove the existing RCA video cable, connect the IT-SV1, and reconnect the RCA video cable back to the top of the IT-SV1 RCA patch plug. Note, the IT-SV1 patch plug color will NOT match the standard RCA plug colors used on VCR and DVD equipment. The IT-SV1 detects video standards employing negative going sync NTSC, PAL and SECAM signals with amplitude from 0.5V to 2.0V p-p. For video equipment, video detection is an excellent way to determine its power state. When this type of equipment is powered up, a video signal will be present even if the tape or DVD is not in play mode. However, video equipment may not provide a video signal until a few seconds after power up. This must be considered when employing video sensing for power sensing in an installation. The IT-SV1 was designed to work seamlessly with the iTach WF2IR and IP2IR network adapters. Before plugging the IT-SV1 3.5mm jack into an iTach IR/Sensor connector, the iTach connector must be configured as a Sensor Input. This is set through the iTach internal web pages.