QUXGA - Quad UXGA, A Display Standard referring to a video adapter capable of a resolution of up to 3200 by 2400 pixels with an aspect ratio of 4:3. @teqgear

QXGA - Quantum extended graphics array (Quantum XGA), screen resolution of 2048x1536 pixels with an aspect ratio of 4:3. @teqgear

S-video - Super-video. A video color format that combines the three video signals (YUV) into two channels. Brightness/luma (Y) is in one channel, and second one is color/chroma (U and V). S-video provides a sharper image than composite video, but is not as good as component video. @teqgear

Scaler - An electronic circuit that resizes an input signal to fit on a screen with a higher or lower resolution. It may also refer to software that resizes graphics or video. @teqgear

Scan converter - A device that changes the video output from a computer to standard TV signals, allowing a regular TV to be used as a computer screen. Examples: computer-video to NTSC (TV). @teqgear

SDI - Serial Digital Interface. These standards are used for transmission of uncompressed, unencrypted digital television signals (optionally including audio) within television facilities. The standard based on a 270 Mbps transfer rate. @teqgear

Seamless switching - A feature found on many video switchers. This feature causes the switcher to wait until the vertical interval to switch. This avoids a glitch which normally is seen when switching between sources. @teqgear

Serial port - Connection by which a computer can transmit data to another device using Serial Transmission. Serial ports on a PC are commonly designated as COM1 and COM2. The serial port is used with RS-232 protocol to control our switchers and matrix switchers. @teqgear

Signal loss - A video problem that shows up as a faint picture for lack of video information. @teqgear

Signal to Noise ratio - The ratio of the amplitude of a desired signal at any point to the amplitude of noise signals at that same point; often expressed in decibels; the peak value is usually used for pulse noise, while the root-mean-square (rms) value is used for random noise. Abbreviated S/N; SNR. @teqgear

Software - The programs used to instruct a processor and its peripheral equipment to perform prescribed operations. @teqgear

Static IP - An IP address that has been specifically assigned to a device or system in a network configuration. This type of address requires manual configuration of the actual network device or system and can only be changed manually or by enabling DHCP. @teqgear

Stereo - A process of using separate audio signals on separate channels for the left and right audio, thereby giving depth, or dimension to the sound. @teqgear

Subnet mask - The method used for splitting IP networks into a series of subgroups or subnets. The mask is a binary pattern that is matched up with the IP address to turn part of the host ID address field into a field for subnets. @teqgear

SVGA - Super Video Graphics Array. A term used to denote resolutions higher than VGA (640 x 480). SVGA computer graphics cards have a resolution of 800 x 600 (480,000 pixels) but may be able to output resolutions of up to 1280 x 1024 and 16 million colors at an aspect ratio of 4:3. @teqgear

Switcher - A device that allows a selection between more than one source, such as video cameras, VCRs, etc. In audio/video, switchers are a means of connecting many input sources to an output device or a system. Teq Gear offers switchers ranging from 8x1 to 32x1. @teqgear

SXGA - Super Extended Graphics Array. A graphics standard with a resolution of 1280 x 1024 (1,310,720 pixels), with an aspect ratio of 5:4. This exceeds XGA (1024 x 768, at 786,432 pixels). @teqgear

SXGA+ - Introduced in 2004, a graphics standard with a resolution of 1400 x 1050 (1,470,000 pixels) with an aspect ratio of 4:3. @teqgear

Sync - Synchronization. In video, sync is a means of controlling the timing of an event with respect to other events. This is accomplished with timing pulses to insure that each step in a process occurs at the correct time. For example, horizontal sync determines exactly when to begin each horizontal scan line. Vertical sync determines when the image is to be refreshed to start a new field or frame. There are many other types of sync in a video system. (Also known as "sync signal" or "sync pulse.") @teqgear

TCP - Transmission Control Protocol. A method or protocol used along with the Internet Protocol to send data in the form of message units between computers over the Internet. While IP takes care of handling the actual delivery of the data, TCP takes care of keeping track of the individual units of data or packets that a message is divided into for efficient routing through the Internet. @teqgear

TCP/IP - Transmission Control Protocol/Internet Protocol. The communi­cation protocol of the Internet. Computers and devices with direct access to the Internet are provided with a copy of the TCP/IP program to allow them to send and receive information in an understandable form. @teqgear

Telnet - A computer network utility available on most PCs that allows the computer system to communicate with one of its remote users or clients. A user who wishes to access a remote system initiates a Telnet session using the address of the remote client. The user may be prompted to provide a user name and password if the client is set up to require them. @teqgear

Termination - 1. A load or impedance at the end of a cable or signal line used to match the impedance of the equipment that generated the signal. The impedance absorbs signal energy to prevent signal reflections from going back toward the source. For video signals, termination impedance is typically 75 ohms; for sync signals, it is usually 510 ohms. 2. A connector at the end of a cable. @teqgear

Touch panel - A control panel with a flat surface (usually with graphic divisions or buttons) that functions as a switch or control. Also called a "touch screen." @teqgear