Runco VX-4C, VX-6C

RGB Video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).

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 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 sync

and luminance from color information, typically producing a higher quality display than

composite video.

Scan FrequencyThe horizontal or vertical frequency at which images are generated.

Scan LineOne horizontal line on the display.

SECAMA video output format of some video tape and disc 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.

SlidebarA slidebar is a graphical display of an adjustable setting. The numerical setting often rep-

resents 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 source

is identified at the projector as , , , or , or as other user-defined num-

bers. A source may have numerous corresponding channels defined and recognized by the

projector. See Input.

Source SetupSee Channel.

Spot SizeThe diameter of the smallest dot that can be generated by a CRT projector. This projector

has a fixed spot (pixel) size.

SyncThis term refers to the part of the video signal that is used to stabilize the picture. Sync

can occur in three forms:

1) "Composite sync": the horizontal and vertical components are together on

one cable.

2) "Sync-on-green": the sync is part of the green video.

3) "Separate sync" or "H.SYNC and V.SYNC": the horizontal and vertical

components of the sync are on two separate cables.

Sync WidthThe duration of each sync pulse generated by a computer. The sync width is part of the

blanking time.

TTL VideoA type of RGB video with digital characteristics.

TerminatedA wire connecting a single video source to a display device, such as a projector, must be

terminated by a resistance (usually 75Ωfor video).

Input1

Input2

Input3

Input4

A-5

GLOSSARY