LG -TM250 Service Manual page 54

LG-TM250
the end of the frame or half frame. All bits in the padding are '0'.
Paging. The act of seeking a mobile station when a call has been placed to that mobile station.
Paging Channel (Analog). See Analog Paging Channel.
Paging Channel (CDMA). A code channel in a Forward CDMA Channel used for transmission of control
information and pages from a base station to a mobile station.
Paging Channel Slot. An 80ms interval on the Paging Channel. Mobile station operating in the slotted mode are
assigned specific slots in which day monitor messages from the base station.
Parameter-Change Registration. A registration method in which the mobile station registers when certain of
its stored parameters change.
Parity Check Bits. Bits added to a sequence of information bits to provide error detection, correction, or both.
Persistence. A probability measure used by the mobile station to determine if it should transmit in a given
Access Channel Slot.
Physical Layer. The part of the communication protocol between the mobile station and the base station that is
responsible for the transmission and reception of data. The physical layer in the transmitting station is presented
a frame by the multiplex sublayer and transforms it into an over-the-air waveform. The physical layer in the
receiving station transforms the waveform back into a frame and presents it to the multiplex sublayer above it.
Pilot Channel. An unmodulated, direct-sequence spread spectrum signal transmitted continuously by each
CDMA base station. The Pilot Channel allows a mobile station to acquire the timing of the Forward CDMA
Channel, provides a phase reference for coherent demodulation, and provides a means for signal strength
comparisons between base station for determining when to handoff.
Pilot PN Sequence. A pair of modified maximal length PN sequences with period 2 15
used to spread the
Foward CDMA Channel and the Reserve CDMA Channel. Different base station are identified by different pilot
PN sequence offsets.
Pilot PN Sequence Offset Index. The PN offset in units of 64 PN chips of a pilot, relative to the zero offset
pilot PN sequence.
PN Chip. One bit in the PN sequence.
PN Sequence. Pseudonoise sequence. A periodic binary sequence.
Power Control Bit. A bit sent in every 1.25ms interval on the Forward Traffic Channel to signal the mobile
station to increase or decrease its transmit power.
Power Control Group. A 1.25ms interval on the Forward Traffic Channel and the Reverse Traffic Channel.
See also Power Control Bit.
Power-Down Registration. Au autonomous registration method in which the mobile station registers on power
up.
PPM. Parts per million.
Preamble. See Access Channel Preamble and Traffic Channel Preamble.
Primary CDMA Channel. A CDMA Channel at a pre-assigned frequency assignment used by the mobile
station for initial acquisition. See also Secondary CDMA Channel.
Primary Paging Channel (CDMA). The default code channel (code channel 1) assigned for paging on a
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