CompuServe Messages

Perry,<BTW…anyone know anything about Drop out compensatators….> I'm no rocket scientist, but here goes. Drop out Compensator circuits essentially take a portion of the RF signal from the playback VTR to "fill in" horizontal luminance streaks that show up in the picture. A simple way to think of it would be to look at a still frame that has a large amount of brownish color, when a white streak of a certain luminance level is detected, it is "filled in with an amalgam of the RF color signal of the adjacent horizontal scan lines (in this case mostly brown) to "cover up" the white streak. Since the drop out only appears on the screen for a brief instant, the untrained eye usually misses the occourance. This "combining" process is carried out inside the delay circuits of the TBC before it is displayed at the output. The range as well as the intensity of the dropout compensation can usually be adjusted. BTW, I have two TBCs that have DOC, and now would not purchase a TBC that doesn't have one. Frank