02-11-2018, 11:10 AM
Sync cancelled vision AGC was employed in many Ekco TV receivers, I suppose the system is a compromise between the simple mean level AGC and an a proper back porch sampling system.
Ultra used a vision AGC system which sampled the black level during the frame blanking period.
I guess that one advantage of negative vision modulation is that the sync pulse tips can be sampled for AGC purposes.
Geprdie McBoyne.
Ultra used a vision AGC system which sampled the black level during the frame blanking period.
I guess that one advantage of negative vision modulation is that the sync pulse tips can be sampled for AGC purposes.
Geprdie McBoyne.
