Control Head Board50
Control Head Board Major Sections50
Controller Section51
Power Management52
- Figure 3-3. Control Head Controller Block52
- Figure 3-4. Control Head Power Distribution53
- Power Distribution53
- Table 3-1. Integrated Circuits Voltages54
- Attiny13 Microcontroller Programming55
- Power up / Power down Sequence55
- Reset Circuits55
- Table 3-2. Attiny13 Programming Kit55
User Interface56
- LCD Display56
- Keypad, Volume and Frequency Knob56
GCAI Accessory Interface56
Figure 3-5. GCAI Block Diagram56
Main Board57
Main Board Major Sections57
- VHF (136-174 Mhz) Band57
  - Figure 3-6. XTL 1500 Main Board Sections (VHF MID Power)—Side 158
  - Figure 3-7. XTL 1500 Main Board Sections (VHF MID Power)—Side 259
- UHF Range 1 (380-470 Mhz) and UHF Range 2 (450-520 Mhz) Band60
- Figure 3-9. XTL 1500 Main Board Sections (UHF Range 1 MID Power and UHF Range 2)—Side 261
- Mhz Band62
- Figure 3-11. XTL 1500 Main Board Sections (700–800 Mhz)—Side 263
Radio Power Distribution64
Figure 3-12. DC Voltage Routing Block Diagram (UHF Range 1 and UHF Range 2)64
Receiver Front-End65
- VHF (136-174 Mhz) Band65
- UHF Range 1 (380-470 Mhz) Band67
- UHF Range 2 (450-520 Mhz) Band69
- Mhz Band71
Receiver Back-End72
- VHF (136-174 Mhz) Band72
  - Abacus III IC72
  - Intermediate Frequency (IF) Section72
- UHF Range 1 (380-470 Mhz) Band73
- UHF Range 2 (450-520 Mhz) Band75
  - Abacus III IC (U5002)75
  - Intermediate Frequency (IF) Filter75
- Mhz Band76
Transmitter78
- VHF (136-174 Mhz) Band78
- UHF Range 1 (380-470 Mhz) Band82
- UHF Range 2 (450-520 Mhz) Band86
- Mhz Band90
Frequency Generation Unit (FGU)94
- VHF (136-174 Mhz) Band94
Reference Oscillator95
LV Frac-N Synthesizer IC95
Figure 3-34. Frequency Generation Unit Block Diagram (VHF)95
Voltage Multiplier96
Superfilter96
Modulation96
Figure 3-35. Waveform Representation During Programming of the LV Frac-N IC (VHF)96
Charge Pump Bias97
Loop Filter97
Lock Detect97
Transmitter Injection97
Receiver Injection98
Transmitter Vcos98
Receiver Vcos98
Prescaler Feedback98
UHF Range 1 (380-470 Mhz) Band98
- Reference Oscillator99
- LV Frac-N Synthesizer IC99
- Figure 3-36. Frequency Generation Unit Block Diagram (UHF Range 1)99
- Voltage Multiplier100
- Superfilter100
- Modulation100
- Figure 3-37. Waveform Representation During Programming of the LV Frac-N IC (UHF Range 1)100
- Charge Pump Bias101
- Loop Filter101
- Lock Detect101
- Transmitter Injection101
- Receiver Injection101
- Transmitter Vcos102
- Receiver Vcos102
- Prescaler Feedback102
- Table 3-9. VCO aux Pin Logic UHF Range 1102
UHF Range 2 (450-520 Mhz) Band103
- Figure 3-38. Frequency Generation Unit Block Diagram (UHF Range 2)103
- Figure 3-39. Waveform Representation During Programming of the LV Frac-N IC (UHF Range 2)104
- LV Frac-N Synthesizer IC104
- Reference Oscillator104
- Voltage Multiplier104
- Charge Pump Bias105
- Lock Detect105
- Loop Filter105
- Modulation105
- Superfilter105
- Receiver Injection106
- Receiver Vcos106
- Transmitter Injection106
- Transmitter Vcos106
- Prescaler Feedback107
Mhz Band107
- Figure 3-40. Frequency Generation Unit Block Diagram (700-800 Mhz)107
- Figure 3-41. Waveform Representation During Programming of the LV Frac-N IC108
- LV Frac-N Synthesizer IC108
- Reference Oscillator108
- Voltage Multiplier108
- Charge Pump Bias109
- Lock Detect109
- Loop Filter109
- Modulation109
- Superfilter109
- Receiver Injection110
- Transmitter Injection110
- Transmitter Vcos110
- Controller Section111
- Receiver Vcos111
  - Prescaler Feedback111

Chapter 4 Troubleshooting Procedures126

Chapter 5 Troubleshooting Charts162

Chapter 6 Troubleshooting Waveforms226

Chapter 7 Schematics, Component Location Diagrams, and Parts Lists240

Chapter 8 Flex Cable Pin-Out Lists428

Appendix A Replacement Parts Ordering430

Glossary432

Index442

Brand	Motorola
Model	Astro XTL 1500
Category	Radio
Language	English

Motorola Astro XTL 1500 User Manual

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Motorola Astro XTL 1500 Specifications

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