1760 SeriesComponent Waveform/Vector Monitor User Manu al G-1
Glossary
AC Coupled A connection which removes the constant
voltage (DC component) on which the signal (AC compo-
nent) is riding. Usually implemented by passing the signal
through a capacitor.
Analog Components Video signals in which a continu-
ously variable voltage or current (rather t han a set of num-
bers) represents the value of a pixel.
APL (Average Picture Level.) The average signal level
(with respectto blanking) during active picture time, ex-
pressed as a percentage of the difference between the blank-
ing and referencewhite levels.
Back Porch The port ion of the video signal which lies
between the trailingedge of the horizontal sync pulse andthe
start of theactive picture time. Burst is located on back
porch.
Bandwidth The range of frequencies over which signal
amplitude remains constant(within some limit) as it is
passed through a system.
Baseband Refers to the composite video signal as i t exists
before modulating the picture carrier. Composite video dis-
tributed throughout a studio and used for recording is at base-
band.
Betacam, Betacam Format Portable camera/recorder
system and related equipment originall y developed by Sony;
the name may also be used for just the recorder or for t he
interconnect format. Betacam uses a version of the Y, R--Y,
B--Y component set.
Black Burst (NTSC) Also called “color black,” black
burst is a composite video signal consisting of all horizontal
and vertical synchronization informati on, burst, and usually
setup. Typically used as the house reference synchronization
signal in televisionfacilities.