Globalstar STX3 - Table of Contents

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