Glossary
1760 SeriesComponent Waveform/Vector Monitor User Manu al G-9
Synchronous Detection A demodulation process in
which the originalsignal is recovered by multiplying the
modulated signal with the output of a synchronous oscillator
locked to the carrier.
Termination In order to accurately send a signal through
a transmissionline, there must be an impedance at the end
which matchesthe impedance of the source and of the line
itself. Amplitudeerrors and reflections will otherwise result.
Video is a 75 Ωsystem, so a 75 Ωterminator must be put at
the end of the signal path.
Time Code, Longitudinal (LTC) LTC is an 80-bit
signal with information which makes it possible to ac curately
identify an individual frame. The LTC signal is typically
recorded on an audio channel.
Time Code, Vertical (VITC) VITC is a signal in the
vertical interval of video, which makes it possible to accu-
rately identify an individualfield.
UThe B--Ysignal after a weight ing factor of 0.493 has been
applied. The weighting is necessary to reduce peak modula -
tion in the compositesignal.
Unmodulated When used to describe television test sig-
nals, this term refers to pulses and pe destals which do not
have high-frequency chrominance informat ion added to
them.
VThe R--Ysignal after a weight ing factor of 0.877 has been
applied. The weighting is necessary to reduce peak modula -
tion in the compositesignal.
Vectorscope Aspecialized oscilloscope whichdemodu-
lates the video signal and presents a display of R--Y versus
B--Y in NTSC systems (or V versusU in PAL systems). The
angle and magnitude of the displayed vectors are respectively
related to hue and saturation.
VerticalInterval The synchronizing information which
appears betweenfields and signals the picture monitor to go
back to the top of the screento begin another vertical scan.