The SP-4D is a synchronizer for serial digital signals up to HD-SDI. The unit synchronizes up to four channels from the dedicated genlock input or any other specified channel. HDTV Compatible. Multi-Standard Operation - SDI (SMPTE 259M and SMPTE 344M) & HD-SDI (SMPTE 292M). Inputs - SD, ED and all HD (up to 1080i/60 and 1080p/30), with automatic standard detection. Frame Rate Conversion - Does not change the video resolution. Genlock - 1 dedicated SDI genlock input with active loop output, common to all four channels or taken from any specific channel. Audio Embedder/De-embedder - Handles 16 audio channels per input. Flexible Control Options - Front panel buttons & RS-232 (K-Router® Windows®-based software is included). Indicators - 40-character LCD display, signal and genlock loss LEDs. Worldwide Power Supply - 100-240V AC.