Motorola ASTRO Digital Spectra Plus Detailed Service Manual page 438

Index-4
RF exposure compliance information 1-ii
RS-232 line drivers, command board 3-13
RX signal path, VOCON board
Spectra 3-18
Spectra Plus 3-41
S
schematics
listing 7-1
troubleshooting 7-1
second VCO, synthesizer 3-6
secure modules
circuit description A-2
Spectra A-1
Spectra Plus A-1
secure operations
errors A-2
keyload failure A-2
serial input/output IC, command board 3-8
signal tracing procedures 4-2
specifications
800MHz 3-xlv
UHF 3-xliv
VHF 3-xliii
SPI bus, VOCON board
Spectra 3-24
Spectra Plus 3-44
standard bias table
Spectra 4-9
Spectra Plus 4-12
synchronous serial bus, command board 3-12
synthesizer
auxiliary control bits 3-5
first VCO frequency generation 3-3
loop filter 3-5
phase modulator 3-5
power distribution 3-6
progammable reference divider 3-4
reference frequency generation 3-3
second VCO 3-6
T
tables listing 1-xvi
theory of operation
command board description 3-8
RF board
description 3-1
receiver back-end circuitry 3-6
synthesizer circuitry 3-3
VOCON board
asynchronous buses
Spectra 3-22
Spectra Plus 3-43
controller bootstrap
Spectra 3-22
Spectra Plus 3-43
controller memory map, Spectra 3-24
controller section
Spectra 3-15
Spectra Plus 3-38
September 5, 2008
description
Spectra 3-15
Spectra Plus 3-38
DSP system clock
Spectra 3-28
Spectra Plus 3-44
MCU system clock
Spectra 3-28
Spectra Plus 3-44
power-up/power-down sequence
Spectra 3-28
Spectra Plus 3-46
RX signal path
Spectra 3-18
Spectra Plus 3-41
serial peripheral interface (SPI) bus
Spectra 3-24
Spectra Plus 3-44
signals, Spectra 3-29
TX signal path
Spectra 3-21
Spectra Plus 3-42
vocoder bootstrap, Spectra 3-24
vocoder memory map, Spectra 3-26
vocoder section
Spectra 3-17
Spectra Plus 3-39
voltage regulators, Spectra Plus 3-45
trademark information 1-ii
transmit deviation, command board 3-13
troubleshooting
charts
introduction 5-1
list 5-1
procedures
handling precautions 4-1
power amplifier
800 MHz band 4-66
UHF band 4-47
VHF band 4-21
power-up self-check diagnostics, Spectra Plus 4-
11
receiver front-end
800 MHz band 4-20
UHF band 4-20
VHF band 4-20
RF board 4-5
signal tracing 4-2
standard bias table
Spectra 4-9
Spectra Plus 4-12
VCO
800 MHz band 4-18
Spectra 4-12
UHF band 4-15
VHF band 4-13
voltage measurement procedures 4-2
schematics,board layouts, and parts lists 7-1
secure operations
errors A-2
keyload failure A-2
6881076C25-E