Guardian G25AMK005, Техническое руководство

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G U A R D I A N V H F 1 1 0 W M O B I L E iii
CONTENTS
CHAPTER 1: GENERAL INFORMATION ................................................................................................. 1-1
1.1 S
COPE
......................................................................................................................................................... 1-1
1.2 G
ENERAL
D
ESCRIPTION
.............................................................................................................................. 1-1
1.3 P
ERFORMANCE
S
PECIFICATIONS
................................................................................................................. 1-1
CHAPTER 2: HARDWARE THEORY OF OPERATION.......................................................................... 2-1
2.1 I
NTRODUCTION
........................................................................................................................................... 2-1
2.2 S
YSTEM
S
PECIFICATIONS
............................................................................................................................ 2-1
2.3 S
YSTEM
B
LOCK
D
IAGRAM
.......................................................................................................................... 2-2
2.4 RECM C
ONTROL
H
ARDWARE
T
HEORY OF
O
PERATION
.............................................................................. 2-4
2.4.1 Control Logic ..................................................................................................................................... 2-4
2.4.2 DSP .................................................................................................................................................... 2-7
2.4.3 Flash ROM......................................................................................................................................... 2-7
2.4.4 RAM .................................................................................................................................................. 2-7
2.4.5 TCXO................................................................................................................................................. 2-7
2.4.6 FPGA ................................................................................................................................................. 2-8
2.4.7 IF ADC............................................................................................................................................... 2-8
2.4.8 Clock Generation ............................................................................................................................... 2-8
2.4.9 Logic Audio CODEC......................................................................................................................... 2-8
2.4.10 Accessory Connector Interface and Filtering ..................................................................................... 2-8
2.4.11 Transceiver Interface and Filtering .................................................................................................... 2-8
2.4.12 Keypad Interface ................................................................................................................................ 2-8
2.4.13 Audio Interface................................................................................................................................... 2-8
2.4.14 Test Interface...................................................................................................................................... 2-9
2.4.15 LED.................................................................................................................................................... 2-9
2.4.16 RECM Power Consumption............................................................................................................... 2-9
2.5 RECM T
RANSCEIVER
S
ECTION
.................................................................................................................. 2-9
2.5.1 Interface Section................................................................................................................................. 2-9
2.5.2 Receiver Section............................................................................................................................... 2-10
2.5.3 Digital/Analog Control..................................................................................................................... 2-13
2.5.4 Keypad Microcontroller ................................................................................................................... 2-14
2.6 A
UDIO
A
MPLIFIER
B
OARD
........................................................................................................................ 2-14
2.6.1 Description ....................................................................................................................................... 2-14
2.6.2 Power Conditioning ......................................................................................................................... 2-14
2.6.3 Communication with Transceiver .................................................................................................... 2-15
2.6.4 Audio Amplifiers ............................................................................................................................. 2-15
2.6.5 Power Levels Detector, Converter, and RF/DC Combiner .............................................................. 2-15
2.6.6 PA ON/OFF Control (Bypass Mode)............................................................................................... 2-16
2.6.7 RF Power Indication ........................................................................................................................ 2-16
2.6.8 Audio Board Block Diagram............................................................................................................ 2-16
2.7 D
ISPLAY
B
OARD
....................................................................................................................................... 2-17
Figure 2-4: Guardian Keypad Board............................................................................................................... 2-17
2.7.1 Control Logic Interface .................................................................................................................... 2-18
2.7.2 Keypad ............................................................................................................................................. 2-18
2.7.3 Switch Interface ............................................................................................................................... 2-18
2.8 F
RONT
P
ANEL
I
NTERFACE
B
OARD
............................................................................................................ 2-18
CHAPTER 3: SOFTWARE THEORY OF OPERATION ........................................................................... 3-1
3.1 F
UNCTIONAL
S
YSTEM
O
PERATION
.............................................................................................................. 3-1
3.1.1 General ............................................................................................................................................... 3-1
3.1.2 Guardian Block Diagram ................................................................................................................... 3-1
3.1.3 Architecture........................................................................................................................................ 3-2
3.1.4 Board Identification ........................................................................................................................... 3-2