User manual

Glossary
1760 Series Component Waveform/Vector Monitor User Manual
G-9
Synchronous Detection A demodulation process in
which the original signal 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 transmission line, there must be an impedance at the end
which matches the impedance of the source and of the line
itself. Amplitude errors and reflections will otherwise result.
Video is a 75 Ω system, so a 75 Ω terminator must be put at
the end of the signal pa th.
Time Code, Longitudinal (LTC) LTC is an 80-bit
signal with information which makes it possible to accurately
identify an i ndividual frame. The LTC signa l 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 individual field.
U The B--Y signal after a weighti ng factor of 0.493 has been
applied. The weighting is necessary to reduce peak m odula-
tion in the composite signal.
Unmodulated W hen used to describe television test sig-
nals, this t erm refers to pulses and pedestals whic h do not
have high-frequency chrominance information added to
them.
V T he R--Y signa l after a weighting factor of 0.877 has be en
applied. The weighting is necessary to reduce peak m odula-
tion in the composite signal.
Vectorscope A specialized oscilloscope which demodu-
lates the vi deo signal and presents a display of R--Y versus
B--Y in NTSC systems (or V versus U in PAL systems). The
angle and ma gnitude of the displayed vectors are respectively
related to hue and saturation.
Vertical Interval The synchronizing information which
appears between fields and signals the picture monitor to go
back to the top of the screen to begin another vertical scan.