In the cable television environment, it is sometimes desirable to remove specific lines of data from the vertical interval of a video signal. For example, some headend scramblers have operational problems when VBI signals are present. Network provided test signals sometimes must be removed for headend video testing.

The VLB-100 removes signals from the active portion of any line(s) between 10 and 21 of both fields in the vertical blanking interval of a video signal. Front panel DIP switches allow you to easily select the lines for removal. No user adjustments are required. The VLB-100 is housed in a small case which can be placed inside an equipment rack and operates from an external power supply, so no heat is generated. It is designed to be looped into the desired video path and to remain on-line.

Specifications*