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Glossary
Model 330, 340SC, and 370SC Service Manual
Glossary of Terms
Adjust Flat Fld
Flat field test pattern used for shading purposes,
(adjusts in 7º increments).
Amorphous
Without definite form; not crystallized.
Arc Lamp
The xenon arc lamp in the Series 300 series projectors.
Produces dangerously intensive light with hazardous levels of
ultraviolet and infrared radiation. It operates at high
temperatures (180ºC, maximum 300º C, or over 500º F).
Aspect Ratio
The ratio of the picture width to picture height. The standard
U.S. television aspect ratio is four units wide to three units
high (1:1.33). High Definition Television (HDTV) is 16:9.
Bandwidth
The transmission or reception capacity of a computer or
communications channel measured in bits per second in
digital and in Hertz in communications. Bandwidth is the
difference between the lowest and highest frequencies
transmitted or received. Wider bandwidth provides more
information or picture detail capability.
Blanking
Image adjustment used to mask out unwanted anomalies on
the picture edges. Blanking can be adjusted inward from 0%
on the left edge and top, and from 100% on the right edge and
bottom.
Brightness
Overall or average intensity of illumination of a video display,
setting black at 0%. Used with Contrast adjustment for best
picture display.
Contrast/Bright
Test pattern used as reference for brightness and contrast
settings.
Channel List
Displays status of all active channels.
Copy Channel
Projector function used to copy geometric and image
adjustment data from one channel to any or all of the other 29
input channels
Chrominance
Abbreviated as "C." Color information signal or signals.