Tektronix DS1001, User Manual

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Glossary
DS1000 Series User Manual
Glossary–5
Termination
An impedance at the end of a transmission line that matches the
impedance of the source and of the line itself. Proper termination
prevents amplitude errors and reflections. Video systems use 75
W
transmission lines, so a 75
W
terminator must be at the end of any
signal path. A receiving device connected to the transmission line
may provide the necessary termination.
Vertical Interval
The synchronizing information that appears between fields and
tells the picture monitor to go back to the top of the screen to begin
another vertical scan.
Y
Abbreviation for luminance.
Zero Carrier Reference Pulse (ZCP)
A pulse in the vertical interval which is produced by the
demodulator to provide a reference for evaluating the depth of
modulation.