Name: Globalstar STX3
Brand: Globalstar
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8545-0198-01 Revision 1.9 STX3 Users Manual

9/24/2020 Globalstar, Inc. Confidential and Proprietary Page | ii

Table of Contents

1 Introduction ...................................................................................................................................................................................... 1

1.1 Purpose..................................................................................................................................................................................... 1

1.2 Applicable Documents .............................................................................................................................................................. 1

1.3 Description ............................................................................................................................................................................... 1

2 Application ........................................................................................................................................................................................ 2

2.1 Theory of Operation ................................................................................................................................................................. 2

2.2 Block Diagram ........................................................................................................................................................................... 4

3 Physical Characteristics ..................................................................................................................................................................... 5

4 Reference Design .............................................................................................................................................................................. 9

4.1 Antenna Requirements .......................................................................................................................................................... 10

1.1. Trace and Cable Losses ........................................................................................................................................................... 10

4.2 Effect of Plastic on Radiation .................................................................................................................................................. 11

4.3 Power Supply Design .............................................................................................................................................................. 11

4.4 Bill of Materials....................................................................................................................................................................... 12

4.5 PCB Layout .............................................................................................................................................................................. 13

5 Application Programming Interface ................................................................................................................................................ 15

5.1 Serial Port ............................................................................................................................................................................... 15

5.2 Serial Packet Mode ................................................................................................................................................................. 15

5.2.1 Serial Packet Format .......................................................................................................................................................... 16

5.2.2 Serial Packet Commands .................................................................................................................................................... 16

5.2.2.1 Send Data (0x00) ....................................................................................................................................................... 16

5.2.2.2 Query Electronic Serial Number (ESN) (0x01) ........................................................................................................... 17

5.2.2.3 Abort Transmission (0x03) ........................................................................................................................................ 17

5.2.2.4 Query Bursts Remaining (0x04) ................................................................................................................................. 17

5.2.2.5 Query Firmware Version (0x05) ................................................................................................................................ 18

5.2.2.6 Setup (0x06) .............................................................................................................................................................. 18

5.2.2.7 Query Setup (0x07).................................................................................................................................................... 19

5.2.2.8 Query Hardware Version (0x09) ................................................................................................................................ 19

5.2.2.9 CW Test Mode (0xFC 0x01) ....................................................................................................................................... 20

5.2.2.10 Send Test Packet (0xFC 0x02) .................................................................................................................................... 20

5.2.2.11 Modulation Test Mode (0xFC 0x03) .......................................................................................................................... 21

5.3 Example CRC calculation routines for serial packets .............................................................................................................. 22

5.4 AT commands ......................................................................................................................................................................... 24

6 Test Modes ...................................................................................................................................................................................... 27

Brand	Globalstar
Model	STX3
Category	Control Unit
Language	English

Globalstar STX3 User Manual

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