Altec al7020s-3v User Manuals

Table of Contents

• INTRODUCTION

  5
• 1.1 Models Description

  5
• 1.2 Summary

  5
• 1.3 Product Specifications

  6
• TECHNICAL OVERVIEW

  7
• 2.1 Block Diagramm of GSM Module

  7
• 2.2 Supported Interfaces

  7
• HARDWARE INTERFACE

  8
• 3.1 Interface Signals

  8
• 3.2 Signal Description

  8
• 3.4 Antenna Interface (RF)

  15
• RF Connector:

  15
• Antenna Performance Recommendations

  16
• Antenna Installation

  16
• User Operation

  16
• 3.5 Internal SIM Card Interface

  17
• SIM Card reader pins supported:

  17
• 3.6 SIM Card Mechanical Drawings

  18
• 3.7 External SIM Card Interface (-ES Option)

  19
• External SIM Card reader pins supported:

  19
• SIM socket pin description:

  19
• SIM Card Reader Integration:

  20
• Layout Restrictions:

  20
• 3.8 Audio - Interface

  21
• Speaker-Circuit

  21
• Microphone circuit

  22
• Audio Circuit Design Considerations

  22
• 3.9 Reset Signal (ON/OFF Signal)

  23
• Software Reset

  23
• CONNECTORS AND PERIPHERAL REFERENCE

  24
• RF CONNECTOR

  24
• Microphone

  24
• Speaker

  24
• Antenna Cable

  24
• GSM antenna

  24
• DESIGN GUIDELINES

  25
• 5.1 Electromagnetic Interference (EMI) Considerations

  25
• Grounding

  26
• Power Supply 5V (5V Models)

  26
• Power Supply 3.3V (3V Models)

  27
• Preferred Regulators

  27
• RF Antenna

  28
• 5.2 Manufacturing Considerations

  28
• MODULE DIMENSIONS

  29
• REGULATORY APPROVALS

  30
• 7.1 Considerations for Regulatory Approvals

  30
• Regulatory Requirements

  30
• Regulatory Statement

  30
• 7.2 Safety Precautions

  31
• User Operation

  31
• Antenna Installation

  31
• Antenna care and replacement

  31
• Electronic devices

  31
• APPENDIX A

  32
• REFERENCE DOCUMENTS

  32
• Table 3-1. Serial TTL Signals

  9
• Table 3-2. Signal Descriptions

  10
• Table 3-3. Signal Descriptions (Cont'd)

  11
• Table 3-3. Signal Descriptions (Cont'd)

  12
• Table 3-4. Analog Electrical Characteristics

  12
• Table 3-5. Digital Electrical Characteristics

  13
• Table 3-6. Absolute Maximum Ratings

  14
• Table 3.7 Antenna Performance Recommendations

  16
• Table 3.8. Headset Speaker Output at Maximum Volume Level

  21
• FIGURE 2-1. INTERFACE BLOCK DIAGRAM

  7
• FIGURE 3-1. SERIAL PINOUT

  9
• FIGURE 3-5. SIM CARD READER

  17
• FIGURE 6-2. MECHANICAL DRAWINGS

  29