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Glossary
A-6
DVC4000
Operator’s Guide/Tech Ref Manual
Hz
Hertz
Hz is a unit of frequency of one cycle per second. Hz
replaces the earlier term of “cycles per second”
(CPS).
ICI
Inter-Carrier Interference
ICR
Inter-City Relay
ID
Identification
IDU
Indoor Unit
IF
Intermediate Frequency
IMD
Inter-Modulation Distortion
I/O
Input/Output
IP Address
An Internet Protocol (IP) address is a 32-bit number
(for example, 123.45.67.89 for IP version 4) or a 128-
bit number (for IP version 6) that identifies the
network device that is sending or receiving
information that is transmitted across a local area
network (LAN) or the Internet.
IRD
Integrated Receiver Decoder
IRE
1. Institute of Radio Engineers, an international
professional radio engineering association that
establishes various standards.
2. A unit of measurement, established by the IRE, in
which 1 IRE Unit =.00714 volts peak-to-peak (Vp-p)
and 140 IRE units equals 1 Vp-p.
ISI
Inter-Symbol Interference
ISO
International Standards Organization
Kbps
Kilobits per second
KHz
Kilo (1,000) Hz
LAN
Local Area Network
Table A-1: Useful Terms (Continued)
LBO
Line Build Out
LC
Left Circular polarization
LCD
Liquid Crystal Display
Lcl
Local
LCP
Left Circular Polarization
LED
Light Emitting Diode
LIU
Line Interface Unit
LMS-T
Link® Modulation System - Terrestrial
A proprietary algorithm system for modulation.
LNA
Low Noise Amplifier
LNB
Low Noise Block Downconverter
LNC
Low Noise Converter
LO
Local Oscillator
LOS
Loss of Signal
LPF
Low Pass Filter
LQ
Link Quality
MAC
Address
The Media Access Control (MAC) address is a
unique identification number for a network device on
a local area network (LAN) or other network. This
number (a physical address such as 00-A1-B2-C3-
D4-5F) is stored in the device's network adapter and
is used to acquire an IP address for the device.
MaxRC
Maximal Ratio Combining
Mbps
Megabits per second
MER
Modulation Error Ratio
Modulation error ratio is a measure used to quantify
the performance of a digital radio transmitter or
receiver using digital modulation, such as QAM.
Table A-1: Useful Terms (Continued)