Motorola ASTRO Digital Spectra Service Manual

Index-1
6881076C25-D October 28, 2002
Index Index
Numerics
800Mhz specifications xliii
A
ABACUS II IC, receiver back-end 3-7
amplifier, power
800 MHz band
15-Watt 3-77
35-Watt 3-77
description 3-55
troubleshooting
800 MHz band 4-66
UHF band 4-47
VHF band 4-21
UHF band
40-Watt 3-72
high-power 3-68
VHF band
25/10-Watt 3-59
50-Watt 3-63
high-power 3-55
analog mode of operation 2-2
assemblies, radio 2-1
assembly
command board 2-1, 2-7
control-head 2-1, 2-2
front-end receiver 2-1, 2-6
power amplifier 2-1, 2-5
RF board 2-1, 2-6, 3-1, 3-8
VCO/buffer/divider board 2-1
VOCON board
components 2-1
description 2-7
Spectra 3-15
Spectra Plus 3-38
VOCON Plus board 2-1
voltage-controlled oscillator (VCO) 2-6
ASTRO mode of operation 2-2
asynchronous buses, VOCON board
Spectra 3-22
Spectra Plus 3-43
auxiliary control bits, synthesizer 3-5
B
B+ power routing 2-9
board layouts, troubleshooting 7-1
C
charts, troubleshooting
introduction 5-1
list 5-1
circuit protection, power amplifier assembly 2-5
command board
assembly
components 2-1
description 2-7
encryption voltages 3-13
external bus serial communications 3-11
flash programming 3-13
microcontroller and support ICs 3-8
microphone audio 3-12
power-up/-down sequence 3-9
received audio 3-12
regulator and power control IC 3-14
regulators 3-10
reset circuits 3-10
RS-232 line drivers 3-13
serial input/output IC 3-8
synchronous serial bus 3-12
transmit deviation 3-13
component
location diagrams listing 7-1
parts lists 7-1
control-head assembly
backlight LEDs 2-3
controls and indicators 2-3
description 2-1, 2-2
display
W3 2-2
W4, W5, W7 2-2
W9 2-3
ignition sense circuits 2-4
power supplies 2-4
status LEDs 2-3
vacuum fluorescent
display driver 2-3
voltage source 2-3
vehicle interface ports 2-4
controller bootstrap, VOCON board
Spectra 3-22
Spectra Plus 3-43
controller memory map, VOCON board, Spectra 3-24
controller section, VOCON board
Spectra 3-15
Spectra Plus 3-38
controls and indicators, control-head assembly 2-3
copyrights
computer software ii
document ii
D
DC interconnect, power amplifier assembly 2-5
DC power distribution 2-8
diagnostics, power-up self-check, Spectra Plus 4-11
display
W3 2-2
W4, W5, W7 2-2
W9 2-3
DSP system clock
Spectra 3-28
Spectra Plus 3-44
E
encryption modules
circuit description A-2

Motorola ASTRO Digital Spectra Specifications

General

Brand	Motorola
Model	ASTRO Digital Spectra
Category	Radio
Language	English