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GlossaryGlossary
Subnet mask A series of numbers that define the number of bits to be used for network addresses in a network (subnet) that is divided up
according to IP addresses.
SVGA A type of video signal with a resolution of 800 (horizontal)
×
600 (vertical) dots which is used by IBM PC/AT-compatible
computers.
S-Video A video signal which has the luminance component and colour component separated in order to provide better image quality.
It refers to images which consist of two independent signals: Y (luminance signal), and C (colour signal).
SXGA A type of video signal with a resolution of 1280 (horizontal)
×
1024 (vertical) dots which is used by IBM PC/AT-compatible
computers.
Sync (Synchronisation) 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 "synchronisation". If the signals are not synchronized, problems such as flickering,
blurriness and horizontal interference can occur.
Tr a c k i n g 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.
Trap IP address An IP address for the destination computer when SNMP reports that a problem has occurred.
USB An abbreviation for Universal Serial Bus. USB is an interface for connecting personal computers to peripheral devices which
only support relatively low data transmission speeds.
UXGA A type of video signal with a resolution of 1600 (horizontal)
×
1200 (vertical) dots which is used by IBM PC/AT-compatible
computers.
VGA A type of video signal with a resolution of 640 (horizontal)
×
480 (vertical) dots which is used by IBM PC/AT-compatible
computers.
XGA A type of video signal with a resolution of 1024 (horizontal)
×
768 (vertical) dots which is used by IBM PC/AT-compatible
computers.
YCbCr The carrier signal which is contained in the colour bar signal used in modern TV transmissions. The name comes from the Y
(luminance) signal and the CbCr (chroma (colour)) signals.
YPbPr The carrier signal which is contained in the colour bar signal used in high-definition TV (HDTV) transmissions. The name
comes from the Y (luminance) signal and the PbPr (colour difference) signals.