Glossary
1760 SeriesComponent Waveform/Vector Monitor User Manu al G-7
Modulated (PAL) When referringto television test sig-
nals, this term implies that chrominanceinformation is pres-
ent. (For example, a modulated staircase ha ssubca rrier on
each step.)
Modulation A processwhich allows signal information to
be moved to other frequenciesin order to facilitate transmis-
sion or frequency-domainmultiplexing. See FM for details.
Nonlinear Distortion Refers to distortions which are
amplitude-dependent.
NTSC National TelevisionSystem Committee. The orga-
nization which developed the televi sion standard currently in
use in the United States, Canada, and Japan. Now generally
used to refer to that standard.
PAL Phase Alternate Line. Refersto one of the television
systems used in Europe and many other parts of the world.
The phase of one of the color difference signals alternates
from line to line to help cancel out phaseerrors.
Quadrature AM A processwhich allows two different
signals to modulate a single carrier frequency. The two sig-
nals of interest Amplitude Modulate carrier signals which are
the same frequency but differ in phase by 90 degrees (hence
the Quadrature notation). The two resultant signals can be
added together, and both signals recovered at the other e nd, if
they are also demodulated 90 degrees apart.
Quadrature Distortion Distortionresulting from the
asymmetry ofsidebands used in vestigial sideband television
transmission. Quadrature distortion appears when envelope
detection is used,but can be eliminated by using a synchro-
nous demodulator.
RF Radio Frequency. In television applications, RF gener-
ally refers to the televisionsignal after the picture carrier
modulation process.
RGB Red, Green, and Blue. Also referred to as GBR. The
three primary colorsused in color television’s additive color
reproduction system. These are the three color signals gener-