Motorola CDM1550-LS+ - Default Chapter; Table of Contents

Table of Contents
Product Safety and RF Exposure Compliance .. .. ................ . .. vii
Chapter 1 Introduction
1.1 ScopeofManual ......................................................................................... .. .... . .. 1-1
1.2 Warranty and Service Support.. .............................................................. .. .. ......... 1-1
1.2.1 Warranty Period ..................................... .... ... .. . .... . .... ... . .. ................... .. .. 1-1
1.2.2 Return Instructions ...................................... .. .. .. ................................... .. 1-1
1.2.3 After Warranty Period ..................................... .. ........... .. ...... .. ..... .. ..... .. .. 1-1
1.3 Related Documents .................................. .. ................... ... .. .... ... ...... .. ......... ..... ... . 1-2
1.4 Technical Support ...................................................... .. ... .................................. ... 1-2
1.5 Warranty and Repairs ................................................ ... ... .. ...................... .... .. .. . .. . 1-2
1.6 Radio Model Chart and Specifications ...................... .... .... ... ................................ 1-3
1.7 Radio
Modellnformation ............................................. .. .. ................................ .. ... 1-3
Chapter 2 Theory of Operation
2.1 Overview ........................................................................ ..................... ................. 2-1
2.2 Controller ........................................................ .. .. ........ .. .. ........... .. ............. .... ... .... 2-1
2.2.1 Radio Power Distribution .. ... .... ..... .. .............................. .. .............. .. .. . .. .. 2-2
2.2.2 Automatic
On/Off .......................................... .. ..... .................................. 2-3
2.2.3 Emergency ........................................................ .
.. ........ .. .. . ... ..... .. .... ... .... 2-4
2.2.4
Mechanical On/Off ............................................ ................................ ... .. 2-4
2.2.5
Ignition . .. . .. ... ... ......... ............................................................... ..... . ..... . ... 2-4
2.2.6 Microprocessor
Clock Synthesizer ....... .. ..... .. ............... .. ...... .. ....... .. .. ... .. 2-5
2.2.7
Serial Peripheral Interface (SPI) ................ .... ........... .... ................. .. .. .... 2-5
2.2.8 SBEP
Serial Interface ......................................... ... ................................ 2-6
2.2.9
General Purpose lnpuUOutput .. .......... .. ...................... ... ...... .. ...... ... ....... 2-6
2.2.1
0 Normal Microprocessor Operation ................... .. ....... ... ............ .. .. .. .. ...... 2-7
2.2.11 Static Random Access Memory (SRAM) ......
.. ....... .. .. . .. ......................... 2-8
2.3
Controller Board Audio and Signalling Circuits .... ............................. .... ........... .. .. 2-8
2.3.1 Audio
Signalling Filter IC with Compander (ASFIC CMP) ..................... 2-8
2.3.2 Transmit Audio Circuits ......................................................
.... .. ............ .. 2-9
2.3.3 Microphone
Input Path ............................................ .. . .... ........ .. .... ........ .. 2-9
2.3.3.1 PTT Sensing and TX Audio Processing .
.... .. ....... .. .. ................ 2-10
2.3.3.2 TX Secure Audio (optional) ............................ .. .... . .... .. ............ 2-10
2.3.3.3 Option Board Transmit Audio ........................... .. ........ .... .... ..... 2-10
2.3.4 Transmit Signalling Circuits .......................................................... .. ... .. 2-11
2.3.4.1 Sub-Audible Data (PL/DPL) .................................................... 2-11
2.3.4.2 High Speed Data ....................................... ... .. . .. ............. .. ....... 2-12