Motorola MTR2000 Instruction / Field Service Manual page 40

P
R
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PA Power Amplifier that transmits final RF signal to transmit antenna
PL Private-Line tone squelch; a continuous subaudible tone that is transmitted
along with the carrier (A radio that has PL on the receive frequency will require
both the presence of carrier and the correct PL tone before it will unmute). Also,
if there is PL on the transmit frequency, all transmissions by the radio will be
modulated with the PL tone. Modulation will be continuous.
PLL Phase locked loop; a circuit in which an oscillator is kept in phase with a refer-
ence, usually after passing through a frequency divider.
PSTN Public Switched Telephone Network
PTT Push-to-talk; the switch located on the left side of the radio which, when pressed
causes the radio to transmit.
RA/RT Remote Access/Remote Transmit
RAC Repeater Access Control
RdStat Receiver Data Status
Repeater Remote transmit/receive facility that retransmits received signals in order to im-
prove communications range and coverage.
RF Radio Frequency
RSS Radio Service Software; the software application used to program and service
the station.
RSSI Received Signal Strength Indicator; a dc voltage proportional to the received RF
signal strength.
68P81096E90-F 08/06/07