Tue Mar 19, 2019 12:21 am
Thank you Gary, George seems to keep thinking GenLock is a timecode feed, like a LTC, or Word Clock would generate.
George, GenLock is not time code specific, it does not have any timecode information in it. What Genlock is, is an analog generator-lock signal usually consists of vertical and horizontal synchronizing pulses together with chrominance phase reference in the form of colorburst. No picture information is usually carried to avoid disturbing the timing signals, and the name reference, black and burst, color black, or black burst is usually given to such a signal. A composite colour video signal inherently carries the same reference signals and can be used as a generator-locking signal, albeit at the risk of being disturbed by out-of-specification picture signals. It does Not generate a master clock timecode signal.
In use, a Genlock Generator can be used to synchronize as few as two isolated sources (e.g., a television camera and a videotape machine feeding a vision mixer (production switcher)), or in a wider facility where all the video sources are locked to a single synchronizing pulse generator (e.g., a fast-paced sporting event featuring multiple cameras and recording devices). Generator locking can also be used to ensure that multiple CRT monitors that appear in a movie are flicker-free. Generator locking is also used to synchronize two cameras for Stereoscopic 3D video recordingcamera . The key here is synchronizing, using an analog video pulse signal, not a digital timecode master clock feed. The pulse generated however, is controlled by a frequency clock in the Genlock Generator.
Cheers
Denny Smith
SHA Productions