Motorola Astro Xts5000 Detailed 6881094c31 E Manual

November 16, 20066881094C31-E
Glossary-4
frequency 
generation unitThis unit generates ultra-stable, low-phase noise master clock and other 
derived synchronization clocks that are distributed throughout the 
communication network.
General-Purpose 
Input/OutputPins whose function is programmable.
GPIOSee General-Purpose Input/Output.
host codeObject code executed by the host processor in an ASTRO subscriber 
radio. The host is responsible for control-oriented tasks such as 
decoding and responding to...

6881094C31-ENovember 16, 2006
Glossary-5
low-speed 
handshake150-baud digital data sent to the radio during trunked operation while 
receiving audio.
LSHSee low-speed handshake.
Master In Slave OutSPI data line from a peripheral to the MCU.
Master Out Slave InSPI data line from the MCU to a peripheral.
MCUSee microcontroller unit.
MDCMotorola Digital Communications.
MDIMCU/DSP Interface internal to the Patriot IC.
MHzSee Megahertz.
MegahertzOne million cycles per second. Used especially as a...

November 16, 20066881094C31-E
Glossary-6
over-the-air rekeyingAllows the dispatcher to remotely reprogram the encryption keys in the 
radio.
PAPower amplifier.
pagingOne-way communication that alerts the receiver to retrieve a message.
Patriot ICA dual-core processor that contains an MCU and a DSP in one IC 
package.
PC BoardPrinted Circuit Board. Also referred to as a PCB.
phase-locked loopA circuit in which an oscillator is kept in phase with a reference, usually 
after passing through a frequency...

6881094C31-ENovember 16, 2006
Glossary-7
real-time clockA module that keeps track of elapsed time even when a computer is 
turned off.
receiverElectronic device that amplifies RF signals. A receiver separates the 
audio signal from the RF carrier, amplifies it, and converts it back to the 
original sound waves.
registersShort-term data-storage circuits within the microcontroller unit or 
programmable logic IC.
repeaterRemote transmit/receive facility that re-transmits received signals in 
order to...

November 16, 20066881094C31-E
Glossary-8
signalAn electrically transmitted electromagnetic wave.
Signal Qualifier 
modeAn operating mode in which the radio is muted, but still continues to 
analyze receive data to determine RX signal type.
SIO ICSee Serial Input/Output IC.
Smart Radio 
Interface BoxA service aid containing microcontroller buffered RAM that enhances 
the speed and capability of programming a radio with programming 
software.
softpotSee software potentiometer.
softwareComputer programs,...

6881094C31-ENovember 16, 2006
Glossary-9
time-out timerA timer that limits the length of a transmission.
TOTSee time-out timer.
transceiverTransmitter-receiver. A device that both transmits and receives analog 
or digital signals. Also abbreviated as XCVR.
transmitterElectronic equipment that generates and amplifies an RF carrier signal, 
modulates the signal, and then radiates it into space.
TSOPSee thin small-outline package.
TXTransmit.
UARTSee also Universal Asynchronous Receiver Transmitter....

November 16, 20066881094C31-E
Glossary-10
Notes 

Index-1
6881094C31-ENovember 16, 2006
IndexIndex
Numerics
13 MHz reference generation, flipper IC 3-31
32 kHz oscillator, flipper IC 3-30
5-volt regulator U505, VOCON 3-26
A
Abacus III IC U500 3-7
algorithms, encryption module 3-42
amplifier
audio power U503 3-26
audio pre-amplifier U502 3-26
driver U102 3-9
power transistor 3-10
summing U106 3-11
antenna port J2 3-5
antenna switch, transmitter 3-10
audio
circuitry, GCAP II IC U501 3-25
components, VOCON board 3-24
power amplifier U503 3-26
pre-amplifier...

Index-2
November 16, 20066881094C31-E
errors, power-up self-check 4-5
ESD protection circuitry, VOCON board 3-32
external interface module (EIM) 3-19
F
Flash memory IC U402 3-22
flipper IC U301
13 MHz reference generation 3-31
32 kHz oscillator 3-30
boot data path control 3-29
CMOS support 3-30
detailed theory 3-29
logic level translation 3-29
one-wire support 3-30
side interface connector 3-29
SSI clock and frame sync generator 3-31
USB transceiver 3-29
watchdog timer 3-30
FracN IC U202 3-14
frequency...

Index-3
6881094C31-ENovember 16, 2006
P
parts list
transceiver (RF) board
700-800 MHz 8-12, 8-26
UHF 8-57, 8-72
VHF 8-43
VOCON board
NNTN4563A/B 8-132
NNTN4717D 8-161, 8-175
NNTN4819A 8-147
NTN9564B 8-104
NTN9564C 8-118
parts, ordering replacement A-1
Patriot IC U401
description 3-19
digital signal processor (DSP) 3-20
microcontroller unit (MCU) 3-19
PCIC (power-control IC) U104
automatic level control (ALC) 3-12
D/A outputs 3-13
detailed theory 3-11
purpose 3-8
temperature cut back 3-13
voltage...