Motorola ASTRO Digital Spectra Service Manual

List of Figures xiii
6881076C25-D October 28, 2002
List of Figures
Figure 2-1. DC Voltage Routing Block Diagram.......................................................................................2-9
Figure 2-2. ASTRO Spectra B+ Routing for Vocoder/Controller (VOCON) Board.................................2-10
Figure 3-1. Prescaler IC Block Diagram ..................................................................................................3-2
Figure 3-2. Synthesizer IC Block Diagram...............................................................................................3-2
Figure 3-3. Loop Divider Waveforms .......................................................................................................3-4
Figure 3-4. Loop Filter Schematic............................................................................................................3-5
Figure 3-5. Power-on Reset...................................................................................................................3-11
Figure 3-6. Transmitter Attack Time.......................................................................................................3-14
Figure 3-7. VOCON Board - Controller Section.....................................................................................3-16
Figure 3-8. VOCON Board - Vocoder Section .......................................................................................3-18
Figure 3-9. DSP RSSI Port - RX Mode..................................................................................................3-19
Figure 3-10. DSP RSSI Port - TX Mode ..................................................................................................3-21
Figure 3-11. Host SB9600 and RS232 Ports...........................................................................................3-23
Figure 3-12. Controller Memory Mapping ................................................................................................3-25
Figure 3-13. Vocoder Memory Mapping...................................................................................................3-27
Figure 3-14. ASTRO Spectra Plus VOCON Board - Controller Section ..................................................3-39
Figure 3-15. ASTRO Spectra Plus VOCON Board - Vocoder Section.....................................................3-40
Figure 3-16. ASTRO Spectra Plus RX Signal Path .................................................................................3-41
Figure 3-17. ASTRO Spectra Plus TX Signal Path..................................................................................3-42
Figure 3-18. ASTRO Spectra Plus Host SB9600 and RS232 Ports ........................................................3-44
Figure 3-19. ASTRO Spectra Plus VOCON DC Distribution....................................................................3-45
Figure 3-20. RPCIC Block Diagram.........................................................................................................3-57
Figure 3-21. Regulator/Power Control IC Block Diagram ........................................................................3-61
Figure 3-22. 50-Watt Power Amplifier Block Diagram .............................................................................3-63
Figure 3-23. Regulator/Power Control IC Block Diagram ........................................................................3-65
Figure 3-24. UHF High-Power, Power Amplifier Block Diagram..............................................................3-68
Figure 3-25. RPCIC Block Diagram.........................................................................................................3-70
Figure 3-26. RPCIC Block Diagram.........................................................................................................3-74
Figure 3-27. RPCIC Block Diagram.........................................................................................................3-79
Figure 4-1. VCO Block Diagram—VHF Band ........................................................................................4-14
Figure 4-2. VCO Block Diagram—UHF Band........................................................................................4-17
Figure 4-3. VCO Block Diagram—800 MHz Band.................................................................................4-18
Figure 4-4. Connector Pin-Out—High-Power Amplifier .........................................................................4-22
Figure 4-5. PA Test Adapter, 25/10 Watt Power Amplifier......................................................................4-31
Figure 4-6. PA Test Adapter, 50 Watt Power Amplifier...........................................................................4-40
Figure 4-7. Connector Pin-Out—High-Power Amplifier .........................................................................4-48
Figure 4-8. Block Diagram for Spectra High-Power Power Amplifier.....................................................4-56
Figure 4-9. PA Test Adapter, 40 Watt Power Amplifier...........................................................................4-58
Figure 4-10. PA Test Adapter, 15 and 35 Watt Power Amplifier...............................................................4-67
A listing of schematics and component location diagrams can be found in the Table of Contents and
Table 7-1 on page 7-1 of Chapter 7 Schematics, Component Location Diagrams and Parts Lists.

Motorola ASTRO Digital Spectra Specifications

General

Brand	Motorola
Model	ASTRO Digital Spectra
Category	Radio
Language	English