| |
 |
Products |
|
|
|
|
|
Search |
|
|
|
|
|
|
|
|
NewsLetter |
|
|
|
|
| |
|
|
|
|
|
|
In the Spot Light |
|
|
|
|
|
Downloads |
|
|
|
|
|
![]() |
|
Glossary |
|
|
|
|
|
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
|
|
| Q |
|
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
| |
|
R |
|
Rack unit -
A unit of measurement of the height of a
rack-mounted device. One rack unit, or 1U, is
1.75" (inches). @teqgear |
|
Radio frequency
(RF) - Range of electromagnetic waves
with a frequency or wavelength suitable for
utilization in radio communication. (e.g. radio
and TV) @teqgear
|
|
RAM - Random
Access Memory. A group of memory chips,
typically of the dynamic RAM (DRAM) type, which
function as the computer's primary workspace.
When personal computers first came on the market
in the late 1970s, 64KB (64 kilobytes) of RAM
was the upper limit. @teqgear |
|
RCA plug - A
plug and socket for a two-wire (signal and
ground) coaxial cable that is widely used to
connect analog audio and video components. Also
called a "phono connector," rows of RCA sockets
are found on the backs of stereo amplifiers and
numerous A/V products. The prong is 1/8" thick
by 5/16" long. @teqgear |
|
Remote control
- This device controls an activity,
process, or machine from a distance, as by
radioed instructions or coded signals. @teqgear
|
|
Resistance -
Opposition of a circuit to the flow of electric
current. Resistance is measured in ohms. @teqgear |
|
Resolution - The degree of
sharpness of a displayed or printed character or
image. Resolution is expressed as a matrix of
dots or the density of lines or dots that make
up an image. Resolution determines the detail
and quality of the image. A measure of the
ability of a camera or video system to reproduce
detail, or the amount of detail that can be seen
in an image. A sharp, clear picture is due to
high resolution. @teqgear |
|
Return loss
- A measure of reflected energy in decibels at a
specific frequency and cable length. @teqgear |
|
RGB - Red,
Green, and Blue. The basic components of the
color television system. @teqgear |
|
RGBHV - Red,
Green, Blue, Horizontal Sync, and Vertical Sync.
A five-wire signal where the red, green, and
blue video signals, as well as the horizontal
and vertical sync signals, are on its own
conductor. @teqgear
|
|
RGBS - Red,
Green, and Blue chroma information in a video
signal, with Sync signal. @teqgear |
|
RGsB - Red,
Green, Sync signal and Blue. A three-wire signal
with separate red, green, and blue video signals
with the sync (horizontal and vertical) on the
green signal. @teqgear |
|
Ripple -
Form or display little undulations or waves on
the surface. Generally referring to the wavelike
variations in the amplitude response of a
filter. @teqgear
|
|
RJ-45 -
Registered Jack-45. It is a telephone connector
that holds up to eight wires. RJ-45 plugs and
sockets are used in Ethernet devices. @teqgear |
|
RS-232 -
Recommended Standard-232. A TIA/EIA standard for
serial transmission between computers and
peripheral devices (switcher, modem, mouse,
etc.). Using a 25-pin DB-25 or 9-pin DB-9
connector, its normal cable limitation of 50
feet can be extended to several hundred feet
with high-quality cable. @teqgear
|
|
RS-422 - It
is a serial data communication protocol which
specifies 4 wire, full-duplex, differential
line, multi-drop communications. It provides for
balanced data transmission with
unidirectional/non-reversible, terminated or
non-terminated transmission lines. This standard
is usable over longer distances than RS-232.
This signal governs the asynchronous
transmission of computer data at speeds of up to
920kbits per second. @teqgear |
|
RS-485 - A
TIA/EIA standard for serial multipoint
communications lines. By using lower-impedance
drivers and receivers, RS-485 allows more nodes
per line than RS-422. @teqgear
| |
|
S |
|
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
| |
|
T |
|
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
| |
|
|
|