This "in line" video delay utilizes front mounted toggle switches and a fine trimmer to adjust video delay parameters; it is useful in matching video sources with varied cable runs. A video delay will take the place of the mound of coiled coax that some studios use to time equipment.
Toggle switches are used to adjust the main timing parameters.
A fine "trimmer" adjustment is available to make small adjustments to the delay signal.
Allen Avionics VAR640 Specs
Composite Video, @ 75 ohms, on a BNC connector
Composite Video, @ 75 ohms, with delay, on a BNC connector
0 to 640 nano-seconds
Incremental toggle switches with a variable trimmer