C-2 Glossary Glossary of Terms
C-4 PN: 10580-00252 Rev. K Site Master User Guide
Broadband : Broadband refers to telecommunication that provides multiple channels
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.
Calibration : When making measurements, the instrument must be calibrated in
order to remove residual errors due to measurement setup conditions.
Anritsu recommends performing the calibration under the same
conditions as the measurement: temperature, frequency, number of
points, source power, and IFBW. Calibrations standards with known
reflection coefficients are used to calculate the correction factors. The
calibration must be conducted using the appropriate standards at the
open end of any test port cables and adapters that are connected to the
instrument. This ensures that the match, phase length, and loss of
these cables and adapters are all accounted for. For optimal
performance, high quality phase-stable cables and precision adapters
must be used.
CCDF : Complementary Cumulative Distribution Function (CCDF) is a method
used to characterize the peak power statistics of a digitally modulated
signal. The CCDF curve can be used to determine design parameters for
CDMA systems (such as the amount of back-off to run in a power
amplifier).
Cell : In wireless communication, a Cell is the geographic area encompassing
the signal range from one base station (a site containing a radio
transmitter/receiver and network communication equipment). Wireless
transmission networks are composed of many hexagonal, overlapping
cell sites to efficiently use radio spectrum for wireless transmissions.
Also, cell is the basis for the term ’cellular phone.’
Cell Delineation : Cell Delineation is the process for recognizing the beginning and end of
ATM cells within the raw serial bit stream.
Cell Site : Cell Site, also called Base Station, is the local cellular tower and radio
antenna (including the radios, controller, switch interconnect, etc.) that
handles communication with subscribers in a particular area or cell. A
cellular network is made up of many cell sites, all connected back to the
switch via landline or microwave.
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