Extron Electronics Matrix 200 - Manual (Page 82)

Extron • Matrix 200 • User’s Manual
Appendix A • Part Numbers, Glossary and Troubleshooting
Still – In video, the term “still” is used as opposed to “motion” because there can be a
difference in the way these two types of video are processed for the best viewing
results, especially when the video is line-doubled or line-quadrupled. Still video
includes text and slide presentations, while motion would include movies and TV
programs. See Motion.
Strike – In the Audio/Video business, this is the tearing down of an installation or show.
Switcher – A device which allows the selection between more than one signal (for example:
video cameras, VCRs, etc.).
Sync – In video, a means of synchronizing signals with timing pulses to insure that each
step in a process occurs at exactly the right time. For example: Horizontal Sync
determines exactly when to begin each horizontal line (sweep) of the electron
beam. Vertical Sync determines when to bring the electron beam to the top-left of
the screen to start a new field. There are many other types of sync in a video
system. (Also called Sync Signal or Sync Pulse.)
S-VHS – (Super-Video Home System) A high band video recording process for VHS that
increases the picture quality and resolution capability. See S-Video.
S-Video – The video signal is separated into the Luminance (Y, black and white
information) and the Chrominance (C, color information).
Switcher – In audio/video, a means of selecting an input source and connecting it to an
output device or a system. Also see Matrix Switcher.
System Switcher – A switching device that communicates with other components in a system. For
example, with communications between a switcher and a projector, the
projector’s remote control can command the switcher to change inputs. Also, the
projector can be turned on/off by a command from the switcher.
Terminal – A device typically having a keyboard and display that is capable of sending text
to and receiving text from another device, a network, etc.
Termination – A load, or impedance at the end of a cable or signal line used to match the
impedance of the equipment that generated the signal. The impedance absorbs
signal energy to prevent signal reflections from going back toward the source. In
the video industry, termination impedance is typically 75 ohms.
Tint – See Hue.
Touch Panel – A control panel with a flat surface with areas (usually marked off) that act as
switches, or controls. May also be called “Touch Screen”.
V– Vertical (as in RGBHV), or the Vertical Sync connector on a panel. This is used
when the sync is separated into Horizontal and Vertical components.
Video Converter – See Scan Converter.
Vertical Interval – The synchronizing information which is presented between fields, and then
signals the picture monitor to return to the top of the screen to start another
vertical scan.
Y – In S-Video, “Y” is an abbreviation for Luminance. (“C” is for chrominance.)
Z – A symbol for impedance.
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