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80-99240-1 Rev. D 5-1
5 Hardware Description
This chapter describes the QUALCOMM Globalstar
GSP-1620 Satellite Data Modem hardware, including
mechanical descriptions of the modem, antenna
specifications, user interfaces, and grounding.
Modem Mechanical Description
The GSP-1620 modem is a sandwich made of two circuit card
assemblies (CCAs) that are open and unprotected. As a
result, the GSP-1620 modem must be shielded from direct
impacts, precipitation, and particulates.
I/O is obtained through four connectors:
• Power, Data, and Control functions are accessed via a
25-pin “D” style connector.
• Globalstar RF transmit signals are routed to an
MCX-style coaxial connector (labeled J3 on the board).
• Globalstar RF receive signals are routed to an MCX-style
coaxial connector (labeled J7 on the board).
• The Diagnostic port interface is a 9-pin “D” style
connector.
Modem Board Layout
This section includes the following technical drawings
depicting the modem:
• GSP-1620 Modem Board Layout (Top View), Figure 5-1
• GSP-1620 Modem Board Layout (Side and Bottom View),
Figure 5-2
Note
In Figure 5-1 and Figure 5-2, dimensions are shown as: millimeters
[inches]. Millimeters are the controlling dimensions on these drawings.
Inch dimensions are for reference only.
- Table of Contents 3
- 80-99240-1 Rev. D v 5
- 80-99240-1 Rev. D vii 7
- List of Figures 10
- List of Tables 11
- Revision History 13
- About This Specification 15
- Notational Conventions 16
- Abbreviations and Acronyms 17
- 80-99240-1 Rev. D xix 19
- Related Documentation 21
- Cautions and Warnings 21
- 1 Globalstar Overview 23
- Space Segment 24
- Ground Segment 24
- Coverage 24
- 80-99240-1 Rev. D 1-3 25
- Carriers 26
- 80-99240-1 Rev. D 1-5 27
- Globalstar Overview 28
- 1-6 80-99240-1 Rev. D 28
- 2 GSP-1620 Modem Overview 29
- GSP-1620 Modem Overview 30
- 2-2 80-99240-1 Rev. D 30
- 80-99240-1 Rev. D 2-3 31
- 80-99240-1 Rev. D 2-5 33
- Electric Utility Industry 34
- 80-99240-1 Rev. D 2-7 35
- Water Treatment Plants 36
- Remote Inventory Management 37
- Energy Management 37
- Agriculture 38
- Aviation 38
- 3 Features 39
- AT Commands 40
- Modes of Operation 40
- Short Messaging Service (SMS) 40
- SMS Alerts 41
- SMS Message Field Information 41
- Globalstar Service Alerts 42
- Service Status Message 43
- Packet Data Service 45
- Dynamic IP Addressing 47
- Fixed IP Addressing 47
- Dormant Mode Service 48
- Asynchronous Data Service 49
- Data Rate and Throughput 51
- Features 52
- 3-14 80-99240-1 Rev. D 52
- 4 AT Commands 53
- 5 Hardware Description 57
- Modem Antenna Connectors 60
- Data and Control Ports 60
- Control Port Signals 61
- Data Port Signals 62
- Table 5-1 63
- Diagnostic Port 65
- DC Power 66
- Surge Protection 67
- EMI Filtering 67
- Power Consumption 68
- Power-On 68
- Grounding 70
- Modem Antenna Specifications 72
- Antenna Dimensions and Weight 73
- Antenna Depiction 73
- Hardware Description 74
- 5-18 80-99240-1 Rev. D 74
- Antenna Cable Specifications 75
- Table 5-3 76
- 5-22 80-99240-1 Rev. D 78
- Mounting Multiple Antennas 79
- 5-24 80-99240-1 Rev. D 80
- GSP-1620 Modem Environments 81
- Thermal Radiation 82
- Altitude 83
- Vibration 83
- Mechanical Shock 85
- Acoustic Noise 85
- Environments 86
- Temperature/Humidity 87
- Icing/Freezing Rain/Snow 88
- RF Connector Durability 91
- Materials 91
- Shipping 91
- Environmental Specifications 92
- 6-12 80-99240-1 Rev. D 92
- Certification 93
- 7-2 80-99240-1 Rev. D 94
- RF Restrictions 95
- Pacemakers 97
- Hearing Aids 97
- Other Medical Devices 98
- 8 Modem Integrator’s Kit 99
- 80-99240-1 Rev. D 8-3 101
- Modem Integrator’s Kit 102
- 8-4 80-99240-1 Rev. D 102
- 9 Warranty 103
- Warranty 104
- 9-2 80-99240-1 Rev. D 104
- 10 Product Support 105
- Order Fulfillment Information 106
- 80-99240-1 Rev. D 10-3 107
- Contact information 108
- 80-99240-1 Rev. D 10-5 109
- Product Support 110
- 10-6 80-99240-1 Rev. D 110
- A Specification Summary 111
- [1] q = 0 is zenith 113
- [3] at Tsky = 200 K 113
- Specification Summary 114
- A-4 80-99240-1 Rev. D 114
- 80-99240-1 Rev. D Index-1 115
- Index-2 80-99240-1 Rev. D 116
- 80-99240-1 Rev. D Index-3 117
- 80-99240-1 Rev. D Index-5 119
- Index-6 80-99240-1 Rev. D 120
- 80-99240-1 Rev. D Index-7 121
- Index-8 80-99240-1 Rev. D 122
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