Motorola GP2000 Service Manual page 98

G-4
Term
Private Line (PL)
Program
PTT
PTT ID Select
PTT Short Sidetone
Random Access
Memory (RAM)
Registers
Repeater
RESET
RF PA
Radio Interface Box
(RIB)
Receive Frequency
Reverse Burst /
Turn Off Code
ROM
RSSI
RPT/TA
Rx DPL Code
Rx DPL Invert
A sub-audible tone/code used to create unique/private communication groups
while operating in Conventional Dispatch mode. A generic term for Tone Private
Line (TPL), or Digital Private Line (DPL).
The transfer of CPS information from the computerÕs temporary memory (RAM)
to the radio.
Push-To-Talk: the switch located on the left side of the radio which, when
pressed, causes the radio to transmit.
If PTT ID is activated for the channel, then PTT ID will be sent following the PTT
ID Transmission Type.
PTT Short Sidetone causes the radio to sound one short alert tone, after the
PTT button is pressed, and immediately following the ID being transmitted. The
purpose is to indicate to the radio-user when voice may be initiated.
A temporary storage space used by a computer to operate a software program
currently running. Anything stored in RAM is lost when the computer is turned
off.
Short-term data-storage circuits within the microcontroller.
Remote transmit/receive facility that retransmits received signals to improve
communications coverage.
Reset line: an input to the microcontroller that restarts execution.
Radio Frequency Power AmpliÞer.
Used to connect a personal computer to a radio for the purpose of communi-
cation between the two. The RIB consists of level-shifting circuits that convert
from the standard RS-232 voltage levels of the computer asynchronous serial
interface (COM Port) to the single-ended voltage levels present on the Serial
Bus contacts of the radioÕs connector. The RIB must have an appropriate RIB-
to-radio and RIB-to-computer Radio Interface Cable for communication and ra-
dio programming to occur.
A designated frequency used when receiving carrier for the current channel.
Causes a Tone Private Line (TPL) or Digital Private Line (DPL) code to be
transmitted at the end of a transmission - once PTT is released, and while op-
erating on the current channel. This sub-audible tone causes the receiving ra-
dio to mute its speaker before loss of a carrier is detected. Muting the speaker
eliminates unwanted noise (squelch tail) during loss of carrier detection.
Read Only Memory.
Received Signal-Strength Indicator: a dc voltage proportional to the received
RF signal strength.
Repeater/Talk-Around.
The speciÞc code accepted when receiving Digital Private Line (DPL) encod-
ing, while operating on the current channel.
Setting Rx DPL Invert causes Digital Private Line (DPL) signals to be inverted
when they are received by the radio, while operating on the current channel.
Inverted coding allows for more trafÞc/usage on frequencies.
DeÞnition