Motorola ASTRO Digital Spectra Service Manual page 13

List of Figures xiii
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 Mode .......................................................................................... 3-41
Figure 3-17. ASTRO Spectra Plus TX Mode........................................................................................... 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
Go to Chapter 7 on page 7-1 for a listing of schematics and component location diagrams.
68P81076C25-C July 1, 2002