HP 83206A, Руководство пользователя

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295
Glossary
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notch filter A filter with a notch
characteristic. A certain band (usually
narrow) of frequencies is rejected, usually
with high suppression.
order A message sent from the base to the
mobile which instructs the mobile to
perform an action.
origin offset The magnitude of the RF
carrier leakage relative to the magnitude of
the modulated carrier at the detection point.
origination The process of setting up and
initiating a cellular phone call by the
mobile. A call originated by the base station
is called paging.
Page The Test Set’s state in which it is
paging the transceiver under test in order to
establish communication.
paging The process of setting up and
initiating a cellular phone call by the base
station. A call begun by the mobile station is
called an origination.
PAID Paging Channel Allocation
Identification
PCS Personal Communication Services.
An evolutionary step of wireless
communications which follows cellular
communications. Operating in a different
frequency band from cellular, it is designed
to offer various digital data services as well
as voice communications.
peak EVM See “EVM (EVM1, EVM10)”
on page 293. The peak value of EVM.
personal base station A base station
designed for very small scale use, such as in
a home.
periodic registration Periodic registration
is used for the mobile transceiver to
periodically remind the base station that it is
in the cell. See “registration”.
phase error The rms value of the
difference between the expected phase of
the carrier and the measured phase.
π
/4 DQPSK A DQPSK system in which
the carrier changes phase by a multiple of
π
/4 each time.
picocell A cell of a small size, used in
specific areas such as inside buildings.
private system A non-public system set up
for use by a private group.
probability block A grouping of control
channels which have a certain probability
that it will be able to provide DCCH
support. The service provider determines
which control channels belong to which
probability blocks. The mobile stores the
order of the probability blocks for its home
system.
PSID Public system identification
QPSK Quadrature Phase Shift Keying. A
modulation system in which the signal to be
modulated is digitized, then transmitted on
a carrier with a phase corresponding to the
value of the digital signal.