User Manuals: Motorola Commercial CM306 Portable Radio

Manuals and User Guides for Motorola Commercial CM306 Portable Radio. We have 1 Motorola Commercial CM306 Portable Radio manual available for free PDF download: Service Information

Motorola Commercial CM306 Service Information

Motorola Commercial CM306 Service Information (90 pages)

Brand: Motorola | Category: Radio | Size: 2 MB

Table of Contents

Computer Software Copyrights
2
Table of Contents
3
Chapter 1 MODEL CHART and TECHNICAL SPECIFICATIONS

5
- CM140/CM340/CM160/CM360 Model Chart
  5
- Technical Specifications
  6
Chapter 2 THEORY of OPERATION

9
- Introduction
  9
- UHF (403-440Mhz) Receiver
  9
  - Receiver Front-End
    9
  - Receiver Back End
    10
- UHF Transmitter Power Amplifier (403-440 Mhz)
  10
  - First Power Controller Stage
    10
  - Power Controlled Driver Stage
    11
  - Final Stage
    11
  - Directional Coupler
    11
  - Antenna Switch
    11
  - Harmonic Filter
    12
  - Power Control
    12
- UHF (403-440Mhz) Frequency Synthesis
  12
  - Reference Oscillator
    12
  - Fractional-N Synthesizer
    13
  - Voltage Controlled Oscillator (VCO)
    14
  - Synthesizer Operation
    15
- Controller Theory of Operation
  16
  - Radio Power Distribution
    16
  - Protection Devices
    18
  - Automatic On/Off
    18
  - Microprocessor Clock Synthesiser
    19
  - Serial Peripheral Interface (SPI)
    20
  - SBEP Serial Interface
    20
  - General Purpose Input/Output
    20
  - Normal Microprocessor Operation
    21
  - Static Random Access Memory (SRAM)
    22
- Control Board Audio and Signalling Circuits
  22
  - Audio Signalling Filter IC and Compander (ASFIC CMP)
    22
- Transmit Audio Circuits
  23
  - Microphone Input Path
    23
  - PTT Sensing and TX Audio Processing
    24
- Transmit Signalling Circuits
  25
- Receive Audio Circuits
  27
- Receive Signalling Circuits
  29
  - Sub-Audio Data (PL/DPL) and High Speed Data Decoder
    29
  - Alert Tone Circuits
    30
Chapter 3 TROUBLESHOOTING CHARTS

31
Chapter 4 UHF1 PCB/ SCHEMATICS/ PARTS LISTS

41

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