3-32
Theory of Operation
: Controller
3.2.3
Clock Sources
The main board and keypad board contains multiple crystal clock sources. These sources are active
upon power-up. The controller receives a 16.8 MHz sine wave from the RF section, which is shaped
into square wave and fed to the OMAP timer input. Screen shots and test points for these clock
signals are shown in
Chapter 6
.
Figure 3-23. Controller Clock Architecture
GPS
26 MHz
OMAP
MAKO
CPLD
DDR
SQUARING
TRIDENT
24.576 MHz
32.768 kHz
12 MHz
4.096 MHz
32.768 kHz
16.8 MHz
96 MHz
MACE
Keypad Board
Main Board
Summary of Contents for APX 2000
Page 1: ...APXTM TWO WAY RADIOS APX 1000 APX 2000 APX 4000 APX 4000Li DETAILED SERVICE MANUAL ...
Page 4: ......
Page 6: ...iv Document History Notes ...
Page 8: ...Notes vi Commercial Warranty ...
Page 10: ...Notes ...
Page 22: ...xiv List of Figures Notes ...
Page 226: ...6 64 Troubleshooting Waveforms LF CW on Spectrum Analyzer Notes ...
Page 688: ...Index 4 Index Notes ...
Page 690: ...ii Notes ...
Page 700: ...xvi List of Figures Notes ...
Page 806: ...5 50 Troubleshooting Charts PA Failure Notes ...
Page 1008: ...8 178 Schematics Boards Overlays and Parts Lists Transceiver RF Boards UHF2 84012621001 Notes ...
Page 1062: ...8 234 Schematics Boards Overlays and Parts Lists Keypad Board M2 and M3 PC000261A01 Notes ...
Page 1064: ...ii Notes ...
Page 1068: ...Notes A 4 EMEA Warranty Service and Technical Support Further Assistance From Motorola ...
Page 1090: ...Glossary 10 Glossary Notes ...
Page 1094: ...Index 4 Index Notes ...
Page 1095: ......