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Appendix A: Glossary
RPMX/CX50/CX60/CX67 User’s Manual A-5
The video output (analog or digital) of most computers. Analog RGB video can have
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).
A common asynchronous data transmission standard recommended by the
Electronics Industries Association (EIA). Also called serial communication.
A less common asynchronous data transmission standard in which balanced
differential voltage is specified. RS-422 is especially suited to long distances.
The output from certain video tape players and video equipment. S-Video separates
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.
One horizontal line on the display.
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 slidebar is a graphical display of an adjustable setting. The numerical setting often
represents a percentage but can be a specific unit such as degrees Kelvin.
The device, such as a computer or VCR, connected to the projector for display. See
also Input.
See Channel.
A signal selector that can be connected to a projector for the purpose of adding more
sources.
This term refers to the part of the video signal that is used to stabilize the picture.
Sync can occur in three forms:
• "Composite sync": the horizontal and vertical components are together on
one cable.
• "Sync-on-green": the sync is part of the green video.
• "Separate sync" or "H.SYNC and V.SYNC": the horizontal and vertical
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.
A type of RGB video with digital characteristics.
The distance between the front feet of the projector and the screen. Also called
"Projector-to-Screen Distance”. Always use the correct Christie throw distance
formula to calculate the proper throw distance (±5%) required for your lens.
Balance of red-to-green necessary for realistic representation of NTSC signals.
RGB Video
'
RS-232 '
RS-422 '
S-Video '
Scan Rate '
Scan Line '
SECA
M
'
Slidebar '
Source '
Source Setu
p
'
Switcher '
S
y
nc '
S
y
nc Width '
TTL Video '
Throw Distance '
Tin
t
'