Anritsu S412E User Manual page 138

D-2 Glossary of Terms
BER : Bit Error Rate or Bit Error Ratio (link quality specification/testing)
BERT : Bit Error Rate Test/Tester (BERT) is a test that gauges the quality of
Bias Tee : A three-port network used to supply an isolated DC signal.
Broadband : Broadband refers to telecommunication that provides multiple channels
C/I : Carrier-to-Interference ratio (C/I) is the ratio of power in an RF carrier
Carrier Frequency : Carrier Frequency refers to the nominal frequency of a carrier wave, the
Coaxial Cable : Coaxial Cable (Coax) is a type of electrical communications medium
Coupler : A coupler is a passive device used to split or combine a transmission
D-4
(BER) is a measure of transmission quality. The ratio of error bits to the
total number of bits transmitted. A bit error rate of 10-6 refers to an
average of one error per million bits. It is generally shown as a negative
exponent, (for example, 10-7 which means 1 out of 107 bits are in error
or 1 out of 10,000,000 bits are in error). Bit Error Rate is the fraction of
a sequence of message bits that are in error.
the T1 or digital line. By sending a known pattern to another device
across the span, the far end device can compare incoming pattern to its
own, thereby indicating bit errors on the line.
of data over a single communications medium, typically using some
form of frequency or wave division multiplexing. It is a service or
system requiring transmission channels capable of supporting rates
greater than the Integrated Services Digital Network (ISDN) primary
rate.
to the interference power in the channel.
frequency of the unmodulated electrical wave at the output of an
amplitude modulated, the center frequency of a frequency modulation
signal, frequency modulated, or phase modulated transmitter of the
output of a transmitter when the modulation is zero.
used in the LAN environment. This cable consists of an outer conductor
concentric to an inner conductor, separated from each other by
insulating material, and covered by some protective outer material.
This medium offers large bandwidth, supporting high data rates with
high immunity to electrical interference and a low incidence of errors.
Coax is subject to distance limitations and is relatively expensive and
difficult to install.
line.
PN: 10580-00318 Rev. P
Glossary of Terms
S412E UG