Christie DS+5K User Manual page 126

Appendix A: Glossary
Retrace Time
(Horizontal)
Rise Time
RGB Video
Scan Frequency
Scan Line
Scan Rate
Slide bar
Source Setup
Switcher
Sync Width
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The minimum time required for a CRT projector to move the position of the scanning
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spot from the right edge to the left edge.
' The time required by the video amplifier of the projector to increase its output from
10% to 90% of the maximum value.
The video output (analog or digital) of most computers. Analog RGB video can have
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3, 4, or 5 wires — one each for red, green, and blue, and either none, one or two for
sync. For three-wire RGB, the green wire usually provides sync. (See TTL Video).
RS-232
' A common asynchronous data transmission standard recommended by the Electronics
Industries Association (EIA). Also called serial communication.
RS-422
A less common asynchronous data transmission standard in which balanced
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differential voltage is specified. RS-422 is especially suited to long distances.
S-Video
The output from certain video tape players and video equipment. S-Video separates
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sync and luminance from color information, typically producing a higher quality
display than composite video.
The horizontal or vertical frequency at which images are generated. Also known as
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scan rate or refresh rate.
One horizontal line on the display.
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' The horizontal or vertical frequency at which images are generated.
SECAM
' A video output format of some video tape and disk players (used primarily in France).
SECAM (Sequential Couleur á Mémoire) signals are similar in resolution and
frequency to PAL signals. The primary difference between the two standards is in the
way color information is encoded.
A slide bar is a graphical display of an adjustable setting. The numerical setting often
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represents a percentage but can be a specific unit such as degrees Kelvin.
Source
The device, such as a computer or VCR, connected to the projector for display. A
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source may have numerous corresponding channels defined and recognized by the
projector. See Input.
' See Channel.
A signal selector that can be connected to a projector for the purpose of adding more
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sources.
Sync This term refers to the part of the video signal that is used to stabilize the picture.
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Sync can occur in three forms:
1) "Composite sync": the horizontal and vertical components are together on one
cable.
"Sync-on-green": the sync is part of the green video.
2)
"Separate sync" or "H.SYNC and V.SYNC": the horizontal and vertical
3)
components of the sync are on two separate cables.
' The duration of each sync pulse generated by a computer. The sync width is part of
the blanking time.