Motorola GM950i Manuals

Manuals and User Guides for Motorola GM950i. We have 1 Motorola GM950i manual available for free PDF download: Service Manual

Motorola GM950i Service Manual

Motorola GM950i Service Manual (228 pages)

Brand: Motorola | Category: Radio | Size: 4.64 MB

Table of Contents

Chapter 2 Model Chart and Accessories

15
- Safety Warnings
  5
- Chapter 1 Introduction
  7
- Introduction
  7
- Scope of Manual
  11
- Piece Parts
  12
  - Transmitter
    13
  - Table of Contents
    15
- Model Chart
  17
Chapter 3 Maintenance

19
- Overview
  21
- Speakers
  22
- Assemble Radio
  23
- Exploded View Diagrams and Parts
  24
- Cables
  26
  - Test Equipment
    27
  - Radio Tuning Procedure
    28
    
    PA Bias Voltage
    29
    
    Battery Threshold
    30
    
    Reference Oscillator
    31
    
    Rated Volume
    32
  - Transmit Deviation Limit
    33
  - Transmit Modulation Balance (Compensation)
    34
- Chapter 2
  149
- Model Chart
  149
Table of Contents

151
- Chapter 6 .1
  153
- Model Chart
  153
- Overview
  153
- General
  154
- Technical Speciﬁcations
  154
- Transmitter
  154
- Receiver
  155
Table of Contents

157
- General
  159
- Mhz Tuning Procedure
  159
- Battery Threshold
  161
- PA Bias Voltage
  161
- Reference Oscillator
  162
- Transmitter Power
  162
- Front-End Filter
  163
- Rated Volume
  164
- Squelch
  164
- Transmit Deviation Limit
  165
- Transmit Modulation Balance (Compensation)
  165
Table of Contents

167
- Paragraph Page
  168
- Overview
  169
- Controller
  170
- General
  170
- Voltage Regulators
  170
- Electronic On/Off
  171
- Ignition
  171
- Mechanical On/Off
  171
- Hook
  172
- Microprocessor Clock Synthesizer
  172
- Serial Peripheral Interface (SPI)
  172
- General Purpose Input/Output
  173
- Normal Microprocessor Operation
  173
- SBEP Serial Interface
  173
- Control Head Model A2 or A3
  174
- Audio Filter IC (AFIC)
  175
- Audio Ground
  175
- Controller Board Audio and Signalling Circuits
  175
- General
  175
- MIC Input Path
  175
- Transmit Audio Circuits
  175
- External MIC Path
  176
- PTT Sensing and TX Audio Processing
  176
- Sub-Audible Data (PL/DPL)
  178
- Transmit Signalling Circuits
  178
- High Speed Data and DTMF
  179
- Receive Audio Circuits
  180
- Squelch Detect
  180
- Audio Amplification Speaker (+) Speaker (-)
  181
- Audio Processing and Digital Volume Control
  181
- Discriminator Audio (Unfiltered)
  182
- Filtered Audio
  182
- Handset Audio
  182
- Option Board Audio
  182
  - Accessories
    182
- High Speed Data Decoder
  183
- Receive Signalling Circuits
  183
- Sub-Audible Data Decoder (PL/DPL)
  183
- Alert Tone Circuits
  184
- 216-246Mhz Specific Circuit Description
  185
- Mixer and Intermediate Frequency (IF) Section
  185
- Receiver Front-End
  185
- If IC (U5201)
  186
- Power Controlled Stage
  186
- Transmitter Power Ampliﬁer (PA) 5-25W
  186
- Antenna Switch
  187
- Directional Coupler
  187
- PA Stages
  187
- Harmonic Filter
  188
- Power Control
  188
- Fractional-N Synthesizer (U3701)
  190
- Frequency Synthesis
  190
- Reference Oscillator
  190
- Voltage Controlled Oscillator (VCO)
  190
- Synthesizer Operation
  191
  - Microphone Connector
    223

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