The SQ-HFS-B-1RU is an HD/SD-SDI frame synchronizer which is used in SEQUOIA series frames. The SQ-HFS-4000 frame synchronizer accepts an HD/SD-SDI, one reference video stream, and provides four synchronized HD/SD-SDI outputs. HD/SD-SDI output signals support horizontal & vertical phase adjustment and automatic alignment. The SQ-HFS-4000 frame synchronizer provides automatic cable equalization for up to 984 ft (300 m) (SD-SDI)/328 ft (100 m) (HD-SDI) of Belden 1694A or equivalent cables. Signal presence indication and parameters manual adjustment are provided via LED indicators, selector and paddle switches located on the module edge. 1RU and 2RU back modules are provided for the SQ-HFS-4000 modules when installed in 1RU and 2RU frames, respectively. The SQ-HFS-4000 HD digital video frame synchronizer supports SEQUOIA platform network monitoring system. Parameters manual adjustment, module operating status and signal status indication are provided via SQ-Master control software.