Quectel GPRS Series Manuals

Manuals and User Guides for Quectel GPRS Series. We have 1 Quectel GPRS Series manual available for free PDF download: Audio Design Manual

Quectel GPRS Series Audio Design Manual

Quectel GPRS Series Audio Design Manual (36 pages)

Brand: Quectel | Category: Control Unit | Size: 1 MB

Table of Contents

About the Document

3
Contents

4
- Table of Contents
  4
1 Introduction

8
- Summary
  8
- Safety Information
  8
2 Audio Circuit Design

10
- Audio Circuit Reference
  11
  - M1X
    11
    
    Microphone Reference Circuit
    11
    
    Receiver Reference Circuit
    12
    
    Headset Reference Circuit
    14
  - M95
    14
  - Microphone Reference Circuit
    14
    
    Receiver Reference Circuit
    15
    
    Headset Reference Circuit
    15
    
    SPK Reference Circuit
    16
  - M80
    17
    
    Microphone Reference Circuit
    17
    
    Receiver Reference Circuit
    17
    
    Headset Reference Circuit
    19
    
    SPK Reference Circuit
    19
- Ringtone
  20
- Hands-Free Application at Channel AIN1/AOUT1
  21
- Suggestion for Audio Layout
  22
- TDD Noise Solution
  22
- Suggestion for Mechanical Design
  23
- Component of SPK
  26
- Component of Microphone
  27
3 Description and Suggestion

28
- AT Command
  28
  - At+Qaudch
    28
  - How to Modify Volume
    29
    
    At+Qmic
    29
    
    At+Clvl
    30
    
    At+Qsidet
    31
  - Echo Algorithm
    32
    
    Description of Par0, Par2 and Par12
    34
    
    Recommended Application Field
    35

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