The VM-Q401A color quad processor is used in CCTV camera systems to take analog video input from up to 4 analog CCTV cameras (CVBS) and split / switch the video output based on the users preference. Typically, the VM-Q401A is used as a quad screen splitter (4 cameras on one screen ...The VM-Q401A color quad processor is used in CCTV camera systems to take analog video input from up to 4 analog CCTV cameras (CVBS) and split / switch the video output based on the users preference. Typically, the VM-Q401A is used as a quad screen splitter (4 cameras on one screen), however, this CCTV quad allows the user to control the video display output using the following modes: quad split, full screen, PIP (picture in picture), dual screen (2 camera split), auto sequence.