Epson EH-TW4000 - Manual (Page 61)

59
Glossary
Appendix
Security lock
A device consisting of a protector case with a hole in it
that a commercially-available theft-prevention cable can
be passed through in order to secure the device to a table
or pillar. This projector is compatible with the Microsaver
Security System manufactured by Kensington.
SVGA
A type of image signal with a resolution of 800
(horizontal) x 600 (vertical) dots which is used by IBM
PC/ AT-compatible computers.
SXGA
A type of image signal with a resolution of 1280
(horizontal) x 1024 (vertical) dots which is used by IBM
PC/ AT-compatible computers.
Sync. (Synchronization)
The signals output from computers have a specific
frequency. If the projector frequency does not match this
frequency, the resulting images will not be of a good
quality. The process of matching the phases of these
signals (the relative position of the crests and troughs in
the signal) is called "synchronization". If the signals are
not synchronized, problems such as flickering, blurriness
and horizontal interference can occur.
Tracking
The signals output from computers have a specific
frequency. If the projector frequency does not match this
frequency, the resulting images will not be 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 will appear in the projected images.
VGA
A type of image signal with a resolution of 640
(horizontal) x 480 (vertical) dots which is used by IBM
PC/ AT-compatible computers.
XGA
A type of image signal with a resolution of 1,024
(horizontal) x 768 (vertical) dots which is used by IBM
PC/ AT-compatible computers.
YCbCr
The carrier signal which is contained in the color bar
signal used in modern TV transmissions. The name
comes from the Y (luminance) signal and the CbCr
(chroma [color]) signals.
YPbPr
The carrier signal which is contained in the color bar
signal used in high-definition TV (HDTV )
transmissions. The name comes from the Y (luminance)
signal and the PbPr (color difference) signals.