Re: Grass Valley 100p

If you have a spare black output from the GV-100, run it to the Genlock input on the JVC camera. There should be timing adjustments (H-phase and SCh phase) in the camera menu that will allow you to adjust the camera so the video looks correct going through the switcher. Most Grass Valley 100 switchers have a blanking processor circuit that will smooth out the differences in timing. Not sure if there are any different issues for a switcher over in PAL-land.

Another not as correct but workable way to do it is to loop the video from the camera through the switcher input and then back out and into the REF input on the back of the switcher. Depending on the options on your switcher, there should be controls on the edge of one of the switcher cards (there should be three of them) for adjusting the timing of the switcher to the camera. A waveform monitor and a vector scope will make this much easier to do. If you have the switcher manual, look up the maintenance modes in the book. These will help in timing the signals through the switcher as well. You usually flip a toggle switch in the card edge and then push a reset button to get into the maintenance mode. The manual will have the rest.

E=MC2+/-2db