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Glossary
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Synchronization The signals output from computers have a specific frequency. If the projector frequency does not match this frequency, the resulting
images are not of a good quality. The process of matching the phases of these signals (the relative position of the crests and the troughs in
the signal) is called Synchronization. If the signals are not synchronized, flickering, blurriness, and horizontal interference occur.
Security slot The security slot is compatible with the Microsaver Security System manufactured by Kensington. You can find details about the
Microsaver Security System on the Kensington homepage http://www.kensington.com/
.
Tracking The signals output from computers have a specific frequency. If the projector frequency does not match this frequency, the resulting
images are not of a good quality. The process of matching the frequency of these signals (the number of crests in the signal) is called
Tracking. If tracking is not carried out correctly, wide vertical stripes appear in the signal.
Dolby Digital A sound format developed by Dolby Laboratories. Normal stereo is a 2-channel format that uses two speakers. Dolby Digital is a 6-
channel (5.1-channel) system which adds to this a centre speaker, two rear speakers, and a sub-woofer.
Progressive A method of image scanning whereby the image data from a single image is scanned sequentially from top to bottom to create a single
image.
Refresh rate The light-emitting element of a display maintains the same luminosity and colour for an extremely short time. Because of this, the image
must be scanned many times per second to refresh the light-emitting element. The number of refresh operations per second is called the
Refresh rate and is expressed in hertz (Hz).