Agilent Technologies 83236B, Operating Manual, Page: 161 / 164

161
Glossary
active link A two-way connection with a
mobile phone. The Test Set provides a
froward channel to the phone and monitors
the reverse channel from the phone.
address (GPIB) A means of identifying
the location of instruments in the system for
communication purposes. The default
address for the PCS Interface is 719. See "1.
GPIB Address Selector" on page 26 for
more information.
base station A fixed-location transceiver
in a communications network. The land
station in a cellular or PCS network
carrying on a radio communication with
subscriber units.
Cellular Adapter The
Agilent 83201A,B, 83203B, 83204A,
83205A, or 83206A Cellular Adapter.
CDMA Code Division Multiple Access. A
technique for spread-spectrum, multiple-
access digital communication that creates
channels through the use of unique code
sequences.
downconverter A device in which the
output frequency is the difference of the
input frequency and a local oscillator
frequency.
connectivity software A software
program that is used to verify that the
connections between equipment are correct
and that the connecting cables are intact.
The program also checks the basic
functionality of each instrument in the Test
System.
frame A basic timing interval. For CDMA
access, paging, and traffic channels, a frame
is 20 ms long; for the sync channel, a frame
is 26.666...ms long. For TDMA a frame is
40 ms long.
frame clock A phase-locked loop in the
Cellular Adapter that synchronizes the PCS
Interface with the Cellular Adapter. The
clock rate for CDMA and TDMA differ.
Refer to the Cellular Adapter’s User’s
Guide for further information.
CW Continuous wave. An RF carrier with
no modulation.
GPIB General Purpose Interface Bus.
Agilent Technologies’s implementation of
IEEE-488.2. Control of the PCS Interface is
done through GPIB.
IBASIC controller Instrument BASIC is
the computer language used by the Test
Set’s built-in controller. The Test Set’s
built-in controller runs IBASIC programs to
control the PCS Interface and perform
automatic tests of radios.
local oscillator (LO) An oscillator whose
output is mixed with the received signal to
produce a sum or difference frequency
equal to the intermediate frequency of the
receiver.
mobile station A radio station designed to
be installed in a vehicle or carried by a
person and normally operated when in
motion.
over-the-air Using the Test Set’s protocol
capabilities to establish and maintain an
active voice/traffic channel (link).
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