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Glossary
G-6
1760 Series Component Waveform/Vector Monitor User Manual
Horizontal Sync Horizontal sync is the --40 IRE pulse in
NTSC systems (--300 mV pulse for PAL systems) occurring
at the beginning of each line. This pulse signals the picture
monitor to go back to the left side of the screen and trace
another horizontal line of picture information.
Hue Hue is the property of color which allows us to distin-
guish between colors such as red, yellow, purple, etc.
Hum Hum refers to the undesirable coupling of the 60 Hz
power sine wave for NTSC systems (50 Hz power sine wave
in PAL systems) into other electrical signals.
ITS (PAL) Insertion Test Signal. A test signal which is
inserted in one line of the vertical interval to facilitate in-ser-
vice testing.
IRE (NTSC) A unit equal to 1/140 of the peak-to-peak
amplitude of the video signal, which is typically 1 volt. The
0 IRE point is at blanking level, with sync tip at --40 IRE and
white extending to +100 IRE. IRE stands for Institute of
Radio Engineers, the organization which defined the unit.
Linear Distortion Refers to distortions which are inde-
pendent of signal amplitude.
Luminance (Y) The signal which represents brightness,
or the amount of light in the picture. This is the only signal
required for black and white pictures, and for color syste ms it
is obtained as a weighted sum (Y = 0.3R + 0.59G + 0.11B) of
the R, G, and B signals.
MII (M2) Format Second generation camera/recorder
system developed by Panasonic; also used for just the rec ord-
er or the interconnect format. MII uses a version of the (Y,
R--Y, B--Y) component set.
Modulated (NTSC) When referring to television test
signals, this term implies that chrominance information is
present. (For example, a modulated staircase has subcarrier
on each step.)