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APPENDIX
APPENDIX
128
GLOSSARY OF TERMS
75 OHM RF CABLE
The wire that comes from an off-air
antenna or cable service provider. The
end looks like a hex-shaped nut with a
wire sticking through the middle. It
screws onto the Antenna/Cable thread-
ed jack on the back of the TV.
300 TO 75 OHM ADAPTER
A small device that connects a
two-wire 300 ohm antenna to a 75
ohm RF jack. They are usually about an
inch long with two screws on one end
and a round opening with a wire sticking
out on the other end.
ANALOG TELEVISION
Standard television broadcasting format
in 4:3 picture aspect ratio.
A/V CABLES
Audio/Video cables. Three cables
bunched together—right audio (red),
left audio (white), and video (yellow).
A/V cables are used for stereo play-
back of videocassettes and other A/V
devices.
A/V DEVICE
Any device that produces video or
sound (VCR, DVD, cable box, or televi-
sion).
AMPLIFIER
An electronic device that amplifies
sound from a television, CD player, VCR,
DVD, or other Audio/Video device.
ANTENNA
The physical receiver of television signals
sent over the air. A large metal piece of
equipment does not always have to be
visible to be using an antenna.
CABLE
Cable service box. Refers to the
descrambler box cable subscribers use
to receive cable programming signals.
CABLE TELEVISION
Programming provided by a cable ser-
vice.
DIGITAL TELEVISION
Televisions signals that are transmitted
digitally.
DVI
Digital Video Interface
Accommodates analog and digital inter-
faces with a single connector.
COMPOSITE VIDEO
Typical video jack, uses one wire for
transporting three-color video signals.
COMPONENT VIDEO
Uses three wires for transporting three-
color video signals. Supports higher
quality video.
DELETED
Lets you remove channels from the list
that the end user can scroll through
using CH (Channel) Up/Down.
HDMI
High-definition multi-media interface.
HDTV
High-definition television. Refers to tele-
vision signals that have higher resolution
than ordinary analog TV signals.
HDSTB
High-definition set top box. Refers to a
tuner device that receives high-defini-
tion television signals which have higher
resolution than ordinary analog TV sig-
nals.
INPUT
Refers to the input jack that receives a
signal from a TV, VCR, DVD Player or
other Audio/Video device.
JACK
An input or output connector on the
back of a TV, VCR, DVD Player or
other Audio/Video device.
MONO SOUND
Mono (monaural) sound is one channel
of sound. On more than one speaker, all
the speakers play the same audio.
OUTPUT
Refers to the output jack that sends a
signal out of a VCR, DVD, or other A/V
device.
PHYSICAL CHANNEL NUMBER
The actual channel number. Analog
channels use the physical channel num-
ber and digital channels can use a virtual
channel number.
RGB (Red, Green, Blue)
Connection input or output port avail-
able for producing a video image using
three separate colors: Red, Green, and
Blue.
RS-232
Serial communication port through
which firmware is downloaded.
2ND AUDIO PROGRAMMING/SAP
Second Audio Programming (SAP) is
another, separate audio channel available
with some programming. Choosing SAP
often refers to listening to audio in
another language, such as Spanish or
French.
SIGNAL
Picture and sound traveling through a
cable, or over the air, to the TV.
STEREO SOUND
Stereo (Stereophonic) sound refers to
audio that’s divided into right and left
sides.
TUNER
Device that picks up the broadcast sig-
nal and turns it into picture and sound.
VIRTUAL CHANNEL NUMBER
A re-mapped channel number. Analog
channels use the actual channel number,
but digital channels use a virtual(or
fake) channel number.
XDS
Extended Data Service: Additional pro-
gram information included on the signal
provided at the discretion of the broad-
caster.
A list of definitions for some of the words found in this guide