Product guide
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Roll Taken from the aviation industry, the roll on a projec-
tor refers to the axis of rotation that would rotate the image
of a projector on a screen. Yaw refers to the rotation around
the axis that will move the image on a screen left or right,
while pitch refers to the axis of rotation that would move the
image of a projector up and down on a screen.
Router A dedicated computer hardware or software
package that manages the connection between networks.
S
SaaS (Typically pronounced ‘sass’) Stands for
Software as a Service. SaaS is a model of
software deployment where an application is
hosted as a service provided to customers across the
Internet. By eliminating the need to install and run the
application on the customer’s own computer, SaaS
alleviates the customer’s burden of software maintenance,
ongoing operation, and support.
Saturation A measure of color intensity. In the absence
of saturation the color hue is a shade of grey. A highly satu-
rated hue has a vivid, intense color, while a less saturated
hue appears more muted and grey.
Scaler A device that deinterlaces an image, then scales
it to the native resolution of the output device. It can
signicantly enhance picture quality, particularly on plasma
screens and projectors.
Scan Converter In a projector, this converts a digital
signal from a computer to a video signal for broadcast on a
video projector or TV monitor.
Scan Rate The line drawing speed of a display, usually
given in kHz. A standard denition TV has a scan rate of
15.75 kHz which when you divide by 525 scan lines, gives a
horizontal refresh rate of 30 fps or Hz.
Screen Gain As it applies to projectors, gain is the mea-
surement of a projection screen’s light reectance with unity
gain being one. A high gain screen will reect more light
along a narrower path than lower gain screen. Screen gains
under one use a gray screen to absorb ambient light to help
maintain contrast ratios.
Screendoor Effect An image distortion caused by
digital imagers with a low ll rate. Looks like the picture is
seen through a screen door with thin vertical and horizontal
black lines and is commonly noticeable on lower resolution
LCD displays. An LCD display tted with a microlens array
helps reduce this problem.
SDTV (Standard Denition Television). A class of digital
television (DTV) that refers to the 480i format. 480i is an
interlaced video format that produces a full frame of 480
lines of video in two successive elds. The rst eld includes
the odd lines and the second eld includes the even lines.
Sometimes used to refer to regular television.
Ship Weight Also referred to as actual weight, which is
the gross weight of a freight as measured by a weight scale,
including all packaging, wrapping, and boxing, but not the
shipping container.
Short Throw Lens A lens designed to project a large
image from a short distance.
Short Throw Wall Mount Projector A projector that
mounts on a wall adjacent to the projection screen. The
throw distance is generally just a few inches and allows
people to move freely through the room without concern of
intercepting the light path.
Skew A signal distortion where one part of a signal arrives
at a different time than another and causes color fringes to
the sides of an object.
SMIL (Synchronised Multimedia Integration Language).
Enables website creators dene and synchronize multime-
dia events for presentation and interaction.
SVGA (Super Video Graphics Array). A display resolution
measuring 800 pixels horizontally by 600 pixels vertically
giving a total display resolution of 480,000 individual pixels.
SVGA has a 4:3 aspect ratio.
S-Video A video transmission standard that uses a 4 pin
mini-DIN connector to send video information on two signal
wires called luminance (brightness, Y) and chrominance
(color, C). S-Video is also referred to as Y/C. Considered a
higher quality video source than composite video.
Swingout Flat-Panel Mounts Also referred to as
articulating mounts. These mounts have single or multi-
jointed arms, that allow the mounting head to swingout in a
horizontal motion.
Swivel Refers to the right and left of the mounting plate
attached that attaches the at-panel on the end of the
articulating swingout arm.
SXGA A display resolution measuring 1280 pixels horizon-
tally by 1024 pixels vertically giving a total display resolution
of 1,310,720 individual pixels. SXGA has a 5:4 aspect ratio.
T
Tab-Tensioned A projection screen type that
has connections on all sides of the screen
material, which pull it taut in order to have a at
screen surface.
TCP/IP A networking protocol designed for exible, high-
speed communications, used for LANs and the Internet.
Throw Distance The length of the projection beam
necessary for a particular projector to produce an image
of a specied size. This display size is typically specied by
the end user and the purpose of the display. Based on the
display size the system designer will specify the projec-
tor that should be used for this purpose based on screen
aspect ratio, image brightness and contrast, and any other
special projector features or cost evaluation criteria. Once
the project projector has been selected, the designer
can determine the distance of the projector to the display
surface, which in turn will dictate the type of wall mount to
select. Premier Mounts offers the UNI line of short-throw
projector wall mounts available in three lengths. Each model
is adjustable within its own range to enable various screen
sizes and ne-tuning.
THX (Tom Holman’s eXperiment). A certication for audio
equipment and installation done to a standard set by THX
Ltd, a company owned by George Lucas. Usually geared
towards audio playback for video and cinema.
Tilt Referred to as vertical (upward or downward) motion
of a mounting head along Y-axis of a mount.
Toggler Bolt A fastener for hanging objects on hollow
walls such as drywall. Toggle bolts have wings that open
inside a hollow wall, bracing against it to hold the fastener
securely. The wings are much larger than the bolt they
are attached to. This spreads the weight of the secured
item over a larger area, increasing the weight that can be
secured compared to a regular bolt.
Touch Screen Also called a touch-sensitive screen, a
computer monitor attachment that can sense the location
at which a viewer touches the screen to respond to a ques-
tion or prompt in a script.
Turnbuckle Also known as a stretching screw or bottle
screw, a turnbuckle is a device for adjusting the tension
or length of ropes, cables, tie rods and other tensioning
systems. It normally consists of two threaded eyelets, one
screwed into each end of a small metal loop, one with a
left-hand thread and the other with a right-hand thread. The
tension can be adjusted by rotating the loop, which causes
both eyelets to be screwed in or out simultaneously, without
twisting the eyelets or attached cables.
U
UHF (Ultra-High Frequency). The 300MHz to
3GHz band of radio frequencies used for
broadcast television among other things including
Wi-Fi.
UHP (Ultra High Pressure). An acronym attributed to
projector lamps with an internal pressure of over 3,000 lbs
per square inch. Usually a mercury arc lamp. Also stands
for Ultra High Performance.
UNC (Universal Naming Convention) A standard format
for paths referring to locations directly accessible on a local
area network
Underwriters Laboratories (UL) An independent
product safety certication organization. Based in North-
brook, Illinois, UL develops standards and test procedures
for products, materials, components, assemblies, tools and
equipment, chiey dealing with product safety.
Uniform Resource Identier (URI) A compact string
of characters used to identify or name a resource. The
main purpose of this identication is to enable interaction
with representations of the resource over a network using
specic protocols.
Uniformity A measurement of the evenness of the
brightness of white or a particular color across a display
indicated as a percentage. A measurement of 80% means
the brightness of an image is 20% less at its dimmest point
compared to its brightest.
Unity Gain A projection screen with a gain rating of one
that reects light with a wide viewing angle back to the
viewer. See Gain.
Upconvert To convert a lower resolution signal to a
higher resolution. For example, 480i to 720p.
Upward Tilt Most mounts only have a downward tilt for a
display. In many cases, the upward tilt may refer to a service
tilt that tilts the mount upward to give access to AV connec-
tors or power cables.
URL (Universal Resource Locator) A string of text that
species the location of an object accessible through the
Hypertext Transfer Protocol (HTTP), typically a World Wide
Web address.
UXGA (Ultra Extended Graphics Array). Refers to a display
resolution of 1600 pixels horizontally by 1200 pixels verti-
cally, usually only required in specialist applications. UXGA
has an aspect ratio of 4:3.
V
VBR (Variable Bit Rate). Refers to a variable data
rate for encoding MPEG where picture quality is
maintained but data rates change in accordance
to the requirements of a video passage. Large amounts of
movement and detail require higher data rates. VBR tends
to create more space efcient MPEG les where picture
quality is maintained but data rates change.
Vector Graphics These are programs which store
images using computer algorithms to dene shape, lines,
animation etc.
Vectorscope A specialized oscilloscope used to display
the color information in a video signal. In particular, a
vectorscope decodes the color information into R - Y &
B – Y. Those signals are used to drive the x and y axis of
the scope. Total lack of color in a video signal is displayed
as a dot in the center of the vectorscope display. The angle,
distance around the circle, and magnitude, distance away
from the center, indicates the phase and amplitude of the
color signal.
Vertical Frequency The rate per second, measured in
Hertz (Hz), that the monitor draws all the lines on an entire
screen and the higher the frequency the less a icker is
produced.
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