re ntsc horiz vert drive from black burst jackp netsys com jack powers writes i would like to hook up some cameras that were recently donated to our local community cable tv station which have sync inputs in the form of horizontal and vertical drive our station sync is a black burst which works fine with other boxes with genlock style inputs can anyone point me at a design article or whatever showing how to produce the horizontal vertical drive signals check the station s master sync generator you ll probably find that it already has horizontal and vertical drive outputs that just aren t being used a couple of cables and you re in business another possibility is to find a genlockable sync generator with hd and vd outputs genlock it to station sync and then feed hd and vd to the cameras if neither of these is possible then you ll have to build a sync separator look at the circuit diagrams of your existing sync generators they probably all include circuitry that does what you want dave
