8545-0198-01 Revision 1.9 STX3 Users Manual
9/24/2020 Globalstar, Inc. Confidential and Proprietary Page | 1
1 Introduction
1.1 Purpose
This document describes the physical, electrical, and functional characteristics of the STX3 satellite transmitter module. The
information contained in this document is intended to provide the end user with the necessary technical information required
to use the module in a custom application.
This document is intended to be used by engineers and technical management and assumes a general knowledge of basic
engineering practices by the user.
Please note that Globalstar is only responsible for ensuring that the STX3 meets the published manufacturing specifications
described herein.
1.2 Applicable Documents
STX-3 Reference Design
1.3 Description
The STX 3 is a simplex Satellite transmitter designed to send small packets of user defined data to a network of low earth
orbiting (LEO) satellites using the Globalstar simplex satellite network. The received data is then forwarded to a user defined
network interface that may be in the form of an FTP host or HTTP host where the user will interpret the data for further
processing.
The STX3 is a surface mount module designed to attach to a user defined host PCB which must provide power, an RF
connection to the transmit antenna, and communications with a host processor which will control the operation of the STX3.
All electrical connections are provided via the castellated pads on the perimeter of the PCB.
The STX3 is a small, low-profile device with the dimensions shown below.
Figure 1 (dimensions in inches)
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