VECTRONIC Aerospace VERTEXPLUS Animal Location Collar User Manual STX3 Users Manual 1 1x

VECTRONIC Aerospace GmbH Animal Location Collar STX3 Users Manual 1 1x

Contents

Module manual

Revision 1.1 STX3 Users Manual 01/06/2014 Revision 1.1 Subject To Change without Notice P a g e | 1 STX3 Users Manual
Revision 1.1 STX3 Users Manual 01/06/2014 Revision 1.1 Subject To Change without Notice P a g e | 2 Table of Contents 1 Introduction .................................................................................................................................................................... 3 1.1 Purpose ................................................................................................................................................................... 4 1.2 Applicable Documents ............................................................................................................................................ 4 1.3 Description .............................................................................................................................................................. 4 2 Application ...................................................................................................................................................................... 5 2.1 Theory of Operation ................................................................................................................................................ 5 2.2 Block Diagram ......................................................................................................................................................... 7 3 Physical Charactersistics ................................................................................................................................................. 9 4 Application Programming Interface .............................................................................................................................. 12 4.1 Serial Port .............................................................................................................................................................. 12 4.2 Serial Packet Mode ............................................................................................................................................... 13 4.2.1 Serial Packet Format ..................................................................................................................................... 13 4.2.2 Serial Packet Commands ............................................................................................................................... 14 4.2.2.1 Send Data (0x00) ....................................................................................................................................... 14 4.2.2.2 Query Electronic Serial Number (ESN) (0x01) ........................................................................................... 14 4.2.2.3 Abort Transmission (0x03) ........................................................................................................................ 15 4.2.2.4 Query Bursts Remaining (0x04) ................................................................................................................ 15 4.2.2.5 Query Firmware Version (0x05) ................................................................................................................ 15 4.2.2.6 Setup (0x06) .............................................................................................................................................. 16 4.2.2.7 Query Setup (0x07) ................................................................................................................................... 16 4.2.2.8 Query Hardware Version (0x09) ............................................................................................................... 17 4.3 Example CRC calculation routines for serial packets ............................................................................................ 19 4.4 AT commands ........................................................................................................................................................ 21 5 Test Modes .................................................................................................................................................................... 24 6 REGULATORY APPROVAL .............................................................................................................................................. 26 6.1 Radio Astronomy Site Avoidance .......................................................................................................................... 26 6.2 Regulatory Notices ................................................................................................................................................ 26
Revision 1.1 STX3 Users Manual 01/06/2014 Revision 1.1 Subject To Change without Notice P a g e | 3 Revisions 1.0 11/05/2013 Initial Release 1.1 01/06/2014 Corrected VRF voltage range
Revision 1.1 STX3 Users Manual 01/06/2014 Revision 1.1 Subject To Change without Notice P a g e | 4 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. 1.2 Applicable Documents 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)
Revision 1.101/06/2014 Revision 1.1 Subject To Change without Notice2 Application 2.1 Theory of Operation The STX3 operates on the Globalstar LEO satellite network. LEO (Low Earth Orbit) means that there are a number of satellites in low earth orbit that constantly orbit the planet and can communicate with Globalstar devices that are within range of its current position. Since the satellite position is constantly changing, simplex devices on the ground will transmit (with no knowledge of any of the satellites locations) and the transmissionrelay the message to the nearest satellite gateway as shown below. Once received by the message will be delivered to the simplex gateway where redundant messages are discarded and the data from the message is sent to the OEM via the Internet.1 STX3 Users Manual Subject To Change without Notice P a g eThe STX3 operates on the Globalstar LEO satellite network. LEO (Low Earth Orbit) means that there are a number of low earth orbit that constantly orbit the planet and can communicate with Globalstar devices that are within Figure 2 LEO Constellation Since the satellite position is constantly changing, simplex devices on the ground will transmit (with no knowledge of the transmission may be received by one or more satellites. These satellites will then gateway as shown below. Once received by the satellite simplex gateway where redundant messages are discarded and the data from the ternet. P a g e | 5 The STX3 operates on the Globalstar LEO satellite network. LEO (Low Earth Orbit) means that there are a number of low earth orbit that constantly orbit the planet and can communicate with Globalstar devices that are within Since the satellite position is constantly changing, simplex devices on the ground will transmit (with no knowledge of may be received by one or more satellites. These satellites will then satellite gateway, the simplex simplex gateway where redundant messages are discarded and the data from the
Revision 1.101/06/2014 Revision 1.1 Subject To Change without NoticeMessages are composed of 1 or more 9-byte payloads. The STX3 can only transmit 9payloads greater than 9 bytes will require multiple onThere are brief periods of time where there is no satellite in range of the simplex transmitters due to obstructions and/or satellite coverage geometry. Since a simplex device has no way of knowing if successfully received, the STX3 device is designed to send sent over the Globalstar network. The default value for the number of redundant means that each message sent to the STX3 will be transmitted 3 times. Each transmission will contain the exact same data payload. The redundant transmissions The transmission sequence for a single-packet message using the default setting of 3 redundant transmissions is shown below. 1 STX3 Users Manual Subject To Change without Notice P a g eFigure 3 Simplex Messaging byte payloads. The STX3 can only transmit 9-byte on-air messages, so user payloads greater than 9 bytes will require multiple on-air packets to be transmitted for each user payload. There are brief periods of time where there is no satellite in range of the simplex transmitters due to obstructions satellite coverage geometry. Since a simplex device has no way of knowing if a transmitted message has been successfully received, the STX3 device is designed to send multiple (redundant) transmissions for each message being sent over the Globalstar network. The default value for the number of redundant transmissionsmeans that each message sent to the STX3 will be transmitted 3 times. Each transmission will contain the exact same The redundant transmissions of each message will be sent on a randomized 5-minute packet message using the default setting of 3 redundant transmissions is shown P a g e | 6 air messages, so user ed for each user payload. There are brief periods of time where there is no satellite in range of the simplex transmitters due to obstructions a transmitted message has been for each message being transmissions per message is 3. This means that each message sent to the STX3 will be transmitted 3 times. Each transmission will contain the exact same minute nominal interval. packet message using the default setting of 3 redundant transmissions is shown
Revision 1.101/06/2014 Revision 1.1 Subject To Change without NoticeThe transmission sequence for a two-packet message using the default setting of 3 redundant transmissions is shown below. For normal conditions where the transmitter has an open view of the sky, this will result in a better than 99% chance that the message will be received. 2.2 Block Diagram The basic elements of a design utilizing the STX3 simplex transmitter are shown below. 1 STX3 Users Manual Subject To Change without Notice P a g epacket message using the default setting of 3 redundant transmissions is shown For normal conditions where the transmitter has an open view of the sky, this will result in a better than 99% chance The basic elements of a design utilizing the STX3 simplex transmitter are shown below. P a g e | 7 packet message using the default setting of 3 redundant transmissions is shown For normal conditions where the transmitter has an open view of the sky, this will result in a better than 99% chance
Revision 1.101/06/2014 Revision 1.1 Subject To Change without NoticeThe STX3 provides separate power supply inputs. The digital power supply input (VDIG) is a low power input which powers the digital portion of the STX3. This provides the capability to leave the STX3 in a low power conswhen the transmitter RF section is idle. The RF power supply input is a high power input which is only required while the STX3 is transmitting a data packet. Since the transmission duty cycle is very low, this supply may be turned off the majority of the time and only active during the transmission of a packet. Due to the random nature of the burst transmissions, and open collector output (PWR_EN) is provided by the STX3 which can directly control the high current supply for VRF. This will ensure that the RF power supply is enabled for the transmission. It may also be monitored by the host to determine when each burst has been completed without the need to query the STX3 via the serial host interface 1 STX3 Users Manual Subject To Change without Notice P a g eFigure 4 The STX3 provides separate power supply inputs. The digital power supply input (VDIG) is a low power input which powers the digital portion of the STX3. This provides the capability to leave the STX3 in a low power conswhen the transmitter RF section is idle. The RF power supply input is a high power input which is only required while the Since the transmission duty cycle is very low, this supply may be turned off the ajority of the time and only active during the transmission of a packet. Due to the random nature of the burst transmissions, and open collector output (PWR_EN) is provided by the STX3 which can directly control the high current ensure that the RF power supply is enabled for the minimum amount of time to complete each transmission. It may also be monitored by the host to determine when each burst has been completed without the need to query the STX3 via the serial host interface. P a g e | 8 The STX3 provides separate power supply inputs. The digital power supply input (VDIG) is a low power input which powers the digital portion of the STX3. This provides the capability to leave the STX3 in a low power consumption state when the transmitter RF section is idle. The RF power supply input is a high power input which is only required while the Since the transmission duty cycle is very low, this supply may be turned off the ajority of the time and only active during the transmission of a packet. Due to the random nature of the burst transmissions, and open collector output (PWR_EN) is provided by the STX3 which can directly control the high current amount of time to complete each transmission. It may also be monitored by the host to determine when each burst has been completed without the
Revision 1.101/06/2014 Revision 1.1 Subject To Change without Notice3 Physical Charactersistics 1 STX3 Users Manual Subject To Change without Notice P a g e Figure 5 Top View P a g e | 9
Revision 1.101/06/2014 Revision 1.1 Subject To Change without NoticeFigure 6 Recommended PCB footprint layout (dimensions in inches)1 STX3 Users Manual Subject To Change without Notice P a g eRecommended PCB footprint layout (dimensions in inches) P a g e | 10
Revision 1.1 STX3 Users Manual 01/06/2014 Revision 1.1 Subject To Change without Notice P a g e | 11 PIN NAME TYPE Description 1 CTS Output 5V tolerant, weak internal pull-up, may be pulled up to 5V max external 2 RTS Input 5V tolerant, weak internal pull-up 3 RESERVED No Connect Do NOT connect 4 NC No Connect 5 NC No Connect 6 RESERVED No Connect Do NOT connect 7 VRF Power In 3.0 to 3.6 Volts, 500 mA max load @ 3.3V 8 GND Ground 9 GND Ground 10 GND Ground 11 GND Ground 12 GND Ground 13 GND Ground 14 RFOUT Output 50 ohm single ended antenna connection, use impedance matched trace 15 GND Ground 16 GND Ground 17 GND Ground 18 GND Ground 19 GND Ground 20 GND Ground 21 RESERVED No Connect 22 RESERVED No Connect 23 RESERVED No Connect 24 PWR_EN Output Open collector output to control VRF supply 25 NC No Connect 26 TxD Output 5V tolerant, weak internal pull-up, may be pulled up to 5V max external 27 RxD Input 5V tolerant, weak internal pull-up 28 Test2 Input 5V tolerant, weak internal pull-up 29 Test1 Input 5V tolerant, weak internal pull-up 30 RESERVED No Connect Do NOT connect 31 RESET Input Only drive with open collector, no external voltage to be applied 32 VDIG Power In 3.0 to 5.0 Volts, 50 mA max load @ 3.3V
Revision 1.101/06/2014 Revision 1.1 Subject To Change without NoticeParameter TX output power -40Transmit mode supply current -40Active mode supply current Standby mode supply current Sleep mode supply current 4 Application Programming Interface4.1 Serial Port A half-duplex (0-3.0V) TTL asynchronous serial port (UART) is the primary interface to the user equipment. The serial port operates with the serial parameters of 9600bps, 8 data bits, no parity, 1 stop bit.The RX data input and the RTS inputs are 5V tolerant. The TX data and CTS outputs are 0RS232 input levels are not supported. RS232 data must be converted to TTL before being sent to the unit.Each command from the DTE to the modem (STX) is sent in a serial packet. Upon answers to the DTE and, if applicable, executes the command.In order to wake up the modem (STX) from sleep mode and to indicate the end of the serial packet, each serial packet must be framed by activating RTS before the fcommand. 1 STX3 Users Manual Subject To Change without Notice P a g eTest Conditions Min 40-85º C, Vcc=Vrf=3.3 volts, 50 ohm load 17.0 40-85º C, Vcc=Vrf=3.3 volts, 50 ohm load 315 25º C, Vcc = 3.3 volts 25º C, Vcc = 3.3 volts 25º C, Vcc = 3.3 volts Application Programming Interface 3.0V) TTL asynchronous serial port (UART) is the primary interface to the user equipment. The serial port operates with the serial parameters of 9600bps, 8 data bits, no parity, 1 stop bit. inputs are 5V tolerant. The TX data and CTS outputs are 0-3.0V TTL.RS232 input levels are not supported. RS232 data must be converted to TTL before being sent to the unit.Each command from the DTE to the modem (STX) is sent in a serial packet. Upon receiving the command, the modem answers to the DTE and, if applicable, executes the command. In order to wake up the modem (STX) from sleep mode and to indicate the end of the serial packet, each serial packet must be framed by activating RTS before the first byte of the command and deactivating RTS after the last byte of the P a g e | 12 Typ Max Unit 17.5 18.0 dB 325 350 mA 2.3 2.5 mA 12 50 uA 8 40 uA 3.0V) TTL asynchronous serial port (UART) is the primary interface to the user equipment. The serial 3.0V TTL. RS232 input levels are not supported. RS232 data must be converted to TTL before being sent to the unit. receiving the command, the modem In order to wake up the modem (STX) from sleep mode and to indicate the end of the serial packet, each serial packet irst byte of the command and deactivating RTS after the last byte of the
Revision 1.101/06/2014 Revision 1.1 Subject To Change without Notice4.2 Serial Packet Mode This mode is the legacy mode of operation as implemented in the STX2 which consists of binary data packets.4.2.1 Serial Packet Format Preamble Fixed pattern 0xAA Length Total number of bytes in the serial packet including the preamble Command Command type (See Table 5 Serial Packet Type). Responses to commands carry the same command type as the command that initiated the answer Data Data associated with the command or answer CRC 16 bit CRC 1 STX3 Users Manual Subject To Change without Notice P a g eThis mode is the legacy mode of operation as implemented in the STX2 which consists of binary data packets.ern 0xAA Total number of bytes in the serial packet including the preamble Command type (See Table 5 Serial Packet Type). Responses to commands carry the same command type as the command that initiated the answer Data associated with the command or answer 16 bit CRC Figure 7 Serial Packet Format P a g e | 13 This mode is the legacy mode of operation as implemented in the STX2 which consists of binary data packets. Total number of bytes in the serial packet including the preamble Command type (See Table 5 Serial Packet Type). Responses to commands carry the same command type as the command that
Revision 1.1 STX3 Users Manual 01/06/2014 Revision 1.1 Subject To Change without Notice P a g e | 14 4.2.2 Serial Packet Commands For all serial packet commands as described below: • AA is the Preamble. • NN is the Length. • XX is an unspecified byte value • CLSB is the least significant CRC byte • CMSB is the most significant CRC byte • If an improperly formatted command is received, the STX3 will return a NAK response: AA 05 FF A1 CB 4.2.2.1 Send Data (0x00) The Send Data command requests the STX3 to send from 1 to 144 data bytes over the Globalstar Simplex network. 0x00 header len cmd payload 1 payload 2 payload 3 .. payload N CRC1 CRC2 AA NN 00 XX XX XX XX XX CLSB CMSB Example Command: AA 0E 00 01 02 03 04 05 06 07 08 09 BE E8 Response: AA 05 00 D9 C4 The example above commands the STX3 to send 9 bytes of user defined data over the Globalstar Simplex network. If the STX3 receives a properly formatted Send Data command, it returns an acknowledge response as shown above. If the command is not properly formatted, it will return the NAK response AA 05 FF A1 CB. 4.2.2.2 Query Electronic Serial Number (ESN) (0x01) The Electronic Serial Number command requests the STX3 to respond with the units Electronic Serial Number (ESN). 0x01 header len Cmd CRC1 CRC2 AA 05 01 50 D5 Command: AA 05 01 50 D5 Response: header len Cmd ESN CRC1 CRC2 AA 09 01 XX XX XX XX 86 7A Example Response: AA 09 01 00 23 18 60 86 7A
Revision 1.1 STX3 Users Manual 01/06/2014 Revision 1.1 Subject To Change without Notice P a g e | 15 Where the ESN returned is 2300000. 4.2.2.3 Abort Transmission (0x03) The Abort Transmission command requests the STX3 to abort the current message transmit sequence over the Globalstar Simplex network. 0x03 header len Cmd CRC1 CRC2 AA 05 03 42 F6 Command: AA 05 03 42 F6 Response: AA 05 03 42 F6 4.2.2.4 Query Bursts Remaining (0x04) The Query Bursts Remaining command requests the STX3 to return the current number of bursts remaining the current message transmit sequence over the Globalstar Simplex network. 0x04 header len cmd CRC1 CRC2 AA 05 04 FD 82 Command: AA 06 04 00 F4 33 Response: Header Len 04 count CRC1 CRC2 AA 05 04 XX CC CC Example Response: AA 06 04 00 F4 33 Where the bursts remaining returned is: 0 4.2.2.5 Query Firmware Version (0x05) The Query Firmware Version command requests the STX3 to return the current firmware version. 0x05 header Len cmd CRC1 CRC2 AA 05 05 74 93
Revision 1.1 STX3 Users Manual 01/06/2014 Revision 1.1 Subject To Change without Notice P a g e | 16 Command: AA 05 05 74 93 Response: header Len 04 FW major FW minor CRC1 CRC2 AA 08 05 XX XX XX CC CC Example Response: AA 08 05 01 00 07 57 44 Where the firmware version returned is: 1.07 4.2.2.6 Setup (0x06) The Setup command requests the STX3 to use the specified current setup parameters. These are stored in non-volatile memory. 0x06 Command: Where: • RF channel : Valid values are: 0 = Channel A, 1 = Channel B, 2 = Channel C, 3 = Channel D • # of bursts: Valid values are: 0x01 thru x14 (1 to 20 bursts) • Minimum Burst Interval: Units of 5 seconds. Valid values are: 0x01 thru 0x3C (5 to 300 seconds) • Maximum Burst Interval: Units of 5 seconds. Valid values are: 0x02 thru 0x78 (10 to 600 seconds) Example Command: AA 0E 06 00 00 00 00 00 03 18 30 00 CE 9C Where the setup information is: • RF channel : 00 Channel A • # of bursts: 03 3 bursts per message • Minimum Burst Interval: 18 0x18 = 24, 24 x 5 = 120 seconds • Maximum Burst Interval: 30 0x30 = 48, 48 x 5 = 240 seconds 4.2.2.7 Query Setup (0x07) The Query Setup command requests the STX3 to return the current setup parameters. header len 04 RF channel # of Bursts Interval Min Interval Max RESERVED CRC1 CRC2AA 0E 06 XX XX XX XX XX XX XX XX XX CC CCRESERVED
Revision 1.1 STX3 Users Manual 01/06/2014 Revision 1.1 Subject To Change without Notice P a g e | 17 0x07 header len cmd CRC1 CRC2 AA 05 07 66 B0 Command: AA 05 07 66 B0 Response: Where: • RF channel : Valid values are: 0 = Channel A, 1 = Channel B, 2 = Channel C, 3 = Channel D • # of bursts: Valid values are: 0x01 thru x14 (1 to 20 bursts) • Minimum Burst Interval: Units of 5 seconds. Valid values are: 0x01 thru 0x3C (5 to 300 seconds) • Maximum Burst Interval: Units of 5 seconds. Valid values are: 0x02 thru 0x78 (10 to 600 seconds) Example Response: AA 0E 07 00 23 18 60 00 03 18 30 00 5D 60 Where the setup information returned is: • RF channel : 00 Channel A • # of bursts: 03 3 bursts per message • Minimum Burst Interval: 18 0x18 = 24, 24 x 5 = 120 seconds • Maximum Burst Interval: 30 0x30 = 48, 48 x 5 = 240 seconds 4.2.2.8 Query Hardware Version (0x09) The Query Hardware Version command requests the STX3 to return the current hardware version information. 0x09 header len Cmd CRC1 CRC2 AA 05 09 18 59 Command: AA 05 09 18 59 Response: header len 04 Device Code Board Rev CPU Rev Radio Rev CRC1 CRC2 AA 0A 09 00 01 XX XX XX CC CC header len 04 RF channel # of Bursts Interval Min Interval Max RESERVED CRC1 CRC2AA 0E 07 XX XX XX XX XX XX XX XX XX CC CCRESERVED
Revision 1.1 STX3 Users Manual 01/06/2014 Revision 1.1 Subject To Change without Notice P a g e | 18 Where: • Device Code : Always 1 for STX3 • Board Revision: STX3 hardware revision • CPU Revision: STX3 CPU revision • Radio Revision: STX3 radio revision Example Response: AA 0A 09 00 01 00 8E 62 E5 5E Where the revision information returned is: • Board Revision: 00 • CPU Revision: 8E • Radio Revision: 62
Revision 1.1 STX3 Users Manual 01/06/2014 Revision 1.1 Subject To Change without Notice P a g e | 19 4.3 Example CRC calculation routines for serial packets The following example is written in the C programming language where: int = 32 bits, short = 16 bits, char = 8 bits unsigned short crc16_lsb(unsigned char *pData, int length) { unsigned char i; unsigned short data, crc; crc = 0xFFFF; if (length == 0) return 0; do { data = (unsigned int)0x00FF & *pData++; crc = crc ^ data; for (i = 8; i > 0; i--) { if (crc & 0x0001) crc = (crc >> 1) ^ 0x8408; else crc >>= 1; } }while (--length); crc = ~crc; return (crc); } USAGE: calculate the CRC for a message and update the message CRC unsigned short crc = crc16_lsb(msg, msg [1]-2); msg [msg [1]-2] = (unsigned char) (crc&0xFF); msg [msg [1]-1] = (unsigned char) (crc>>8);
Revision 1.1 STX3 Users Manual 01/06/2014 Revision 1.1 Subject To Change without Notice P a g e | 20 The following example is written in the Java programming language: char crc16_lsb(byte pData[], int length) { int pData_i = 0; char s1,s2; byte i; char data, crc; crc = (char) 0xFFFF; if (length == 0) return 0; do { data = (char)((char)0x00FF & pData[pData_i++]); crc = (char)(crc ^ data); for (i = 8; i > 0; i--) { if ((crc & 0x0001) != 0) crc = (char)((crc >> 1) ^ 0x8408); else crc >>= 1; } }while (--length != 0); crc = (char)~crc; return (crc); } USAGE: calculate the CRC for a message and update the message CRC byte msg[]; int len; char crc = crc16_lsb(msg,len-2); msg[len-2] = (byte)((short)crc & (short)0xff); msg[len-1] = (byte)((short)crc >> 8);
Revision 1.1 STX3 Users Manual 01/06/2014 Revision 1.1 Subject To Change without Notice P a g e | 21 4.4 AT commands Command Response Comments AT This command is used to check communication between the module and the host. OK STX3 is ready for normal operation ERROR STX3 is not ready for operation, an error condition exists AT+GSN? AT+CGSN? Request product serial number identification +GSN: <n-nnnnnnn> product serial number identification (ESN) ERROR Unable to retrieve ESN AT+GMM? AT+CGMM? +GMM: STX3 Request model identification (hardware version). AT+GMI? AT+CGMI? +GMI: GLOBALSTAR Request manufacturer identification AT+GMR? AT+CGMR? Request revision identification (firmware version). +GMR: <MM.mm> MM=Major Revision, mm=Minor Revision Example: +GMR: 01.00 ERROR Unable to retrieve revision identification AT+CMGS=<hhhh..hh> Send message up to 144 data bytes specified by hexadecimal string Example: AT+CMGS=AA5511A53311A53311 OK Message Burst In Progress ERROR Invalid message or modem error AT+CMGSL=<Lat,NS, Lng, EW,hhhhhh> Send location message with 3 data bytes specified by hexadecimal string. Lat: ddmm.mmmm
Revision 1.1 STX3 Users Manual 01/06/2014 Revision 1.1 Subject To Change without Notice P a g e | 22 dd: decimal degrees, mm.mmmm minutes NS: hemisphere (N/S) Lng: dddmm.mmmm ddd: decimal degrees, mm.mmmm minutes EW: hemisphere (E/W) hhhhhh: hexadecimal value of 3 byte payload Example: AT+CMGSL=3025.9857,N,09005.2182,W,A53311 OK Message Burst In Progress ERROR Invalid message or modem error AT+CANX Cancel running transmission. OK Command OK (This command will never return an error. If no transmission is running, it will simply do nothing. This makes it possible for user code to just blindly send this command before any command to transmit if desired.) AT+CGNTR? Request the remaining number of total packet transmissions remaining in a running burst. The value returned by this query will represent the number of packets in the message times the number of burst transmissions remaining. For example, if two transmissions remain in the burst of a 4 packet message, a value of 8 will be returned. If no burst is in progress, a value of 0 will be returned. This command will never return an error. +CGNTR: <n> n= Number of packets left in the burst Example: +CGNTR: 8 AT+CDFC=<channel number> Set the default channel. Valid values are 0 – 3. Example: AT+CDFC=2 OK Command OK, channel was successfully set. ERROR ERROR. Typically means channel number is out of range. AT+CFDC? Request current channel. +CDFC: <n> N= current channel, a number between 0 and 3. AT+CBNT=<Number of tries> Set number of transmissions in burst. <Number of tries> = the number of transmissions in the burst. Range must be 1 – 16. Value may be sent in decimal or HEX format. HEX is indicated with a leading “0x”.
Revision 1.1 STX3 Users Manual 01/06/2014 Revision 1.1 Subject To Change without Notice P a g e | 23 OK Command OK, number of tries successfully set. ERROR Unable to set number of tries. Most likely reason is that the number requested was out of range. Must be 1 – 16. AT+CBNT? Request number of tries setting for bursts. +CBNT: <n> <n>= number of tries set for bursts. AT+CBTMIN=<seconds> Set the minimum time between transmissions in the burst in seconds. Acceptable range is 5 – 300 seconds. Value will be truncated by the device to the nearest divisible of 5. For example, if the number 207 is sent, the device will set the minimum to 205 seconds. Number may be sent in decimal or HEX format. HEX is indicated by a leading “0x”. OK Command accepted and time set. ERROR Time not set, most likely reason is the number was out of range. AT+CBTMIN? Query the minimum time between transmissions in the burst. +CBTMIN: <n> Minimum time between transmissions in a burst, in seconds. AT+CBTMAX=<seconds> Set the maximum time between transmissions in the burst in seconds. Acceptable range is <CBTMIN> – 600 seconds. Value will be truncated by the device to the nearest divisible of 5. For example, if the number 532 is sent, the device will set the minimum to 530 seconds. Number may be sent in decimal or HEX format. HEX is indicated by a leading “0x”. OK Command accepted and time set. ERROR Time not set, most likely reason is the number was out of range. AT+CBTMAX? Query the maximum time between transmissions in the burst. +CBTMAX: <n> Maximum time between transmissions in a burst, in seconds. AT+BDREV? Query the board revision of the STX3 +BDREV: <n> Board revision. TBD if this will even be implemented for the STX3, if unimplemented, will always return 0. AT+PRREV? Query the processor (CPU) revision of the Globalstar ASIC. +PRREV: <n> Processor revision. AT+RAREV? Query the “radio” revision (revision of the transmitter side of the Globalstar ASIC).
Revision 1.1 STX3 Users Manual 01/06/2014 Revision 1.1 Subject To Change without Notice P a g e | 24 +RAREV: <n> Transmitter revision. 5 Test Modes The STX3 provides several test modes intended to aid in manufacturing testing and certification testing. All test modes are activated by grounding selective pins on the STX3 prior to applying power. Once power is applied, the STX3 will sample the states of the pins and based on the states of the pins, the STX3 will enter the selected test mode. For normal operation these pins must be left floating or in a high (logic 1) state. The following tables define the different test modes available in the STX3. TEST1 TEST2 Mode 0 0 Mod Mode (continuous transmission) - A test packet is continuously transmitted. The test packet shall comply with the Air Interface Packet format with a user information equal to the hex stream 0x80AAF0F0F0AAF0F0F0 where the most significant bit is transmitted first 0 1 Test Packet - The test packet shall comply with the Air Interface Packet format with a user information equal to the hex stream 0x80AAF0F0F0AAF0F0F0 where the most significant bit is transmitted first 1 0 CW mode - An un-modulated carrier is continuously transmitted. 1 1 Normal Operation
Revision 1.1 STX3 Users Manual 01/06/2014 Revision 1.1 Subject To Change without Notice P a g e | 25 The channels are selected via the Rx and RTS pins as follows RX RTS Channel 0 0 B 0 1 C 1 0 D 1 1 Channel specified in the flash setup. To specify channel A, it must be the default channel specified in the flash setup. See Setup command for details.
Revision 1.1 STX3 Users Manual 01/06/2014 Revision 1.1 Subject To Change without Notice P a g e | 26 6 REGULATORY APPROVAL The STX3 module has received regulatory approvals for modular devices in the United States and Canada. Modular device approval allows the end user to place the STX3 module inside a finished product and not require regulatory testing for an intentional radiator (RF transmitter), provided no changes or modifications are made to the module circuitry. Changes or modifications could void the user’s authority to operate the equipment. The end user must comply with all of the instructions provided by the Grantee, which indicate installation and/or operating conditions necessary for compliance. The integrator is still responsible for testing the end product for any additional compliance requirements required with this module installed (digital device emission, PC peripheral requirements, etc.) in the specific country that the end device will be marketed. For more information on regulatory compliance, refer to the specific country radio regulations in the following sections. 6.1 Radio Astronomy Site Avoidance The end user device must comply with the requirements for Radio Astronomy Site avoidance as specified by the Globalstar National Science Foundation agreement of 2001. It must be compliant with CFR25.213. 6.2 Regulatory Notices The STX3 has received Federal Communications Commission authorization under FCC Rules Part 25 as a modular transmitter. Final installation must be in compliance with 25.213 (see 6.1 above). The antenna installation and operating configurations of this transmitter must satisfy MPE categorical Exclusion Requirements of 2.1091. The antenna(s) used for this transmitter must be installed to provide a separation distance of at least 20 cm from all persons and must not be collocated or operating in conjunction with any other antenna or transmitter. The STX3 module will satisfy FCC/IC modular transmitter requirements only when used with the antenna specified below. No power amplifiers may be used under the terms of this modular approval. No trace antennas are approved for use under the terms of this modular approval. Manufacturer Part Number Polarization Center Frequency (MHz) Peak Gain (dB) Spectrum PA25-1615-025SA LHCP 1615 .25 3.0 The STX3 module has been labeled with its own FCC ID number, and if the FCC ID is not visible when the module is installed inside another device, then the outside of the finished product into which the module is installed must also display a label referring to the enclosed module: Contains Transmitter Module FCC ID: L2V-STX3 This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.
Revision 1.1 STX3 Users Manual 01/06/2014 Revision 1.1 Subject To Change without Notice P a g e | 27 The user’s manual should include the following statements: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy, and if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment OFF and ON, the user is encouraged to try to correct the interference by one or more of the following measures: • Reorient or relocate the receiving antenna. • Increase the separation between the equipment and receiver. • Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. • Consult the dealer or an experienced radio/TV technician for help. WARNING: Changes or modifications not expressly approved by Globalstar may render the device non-compliant to FCC and other regulatory body standards for operation and may void the user’s authority to operate the equipment. This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. This ClassA/ClassB digital apparatus complies with Canadian ICES-003. This device will operate in accordance to the standards set forth by the CE Mark Directives and standards R&TTE: (TBR41 v1.1.1 May 2000, EN 301 441), RFI: (EN61000-4-3:1996 + A1:1998 + A2:2000), ESD: (EN61000-4-2: 1995 + A1:1998) NOTICE: This equipment complies with the FCC RF Exposure Limits. A minimum of 20 centimeters (8 inches) separation between the device and the user and all other persons should be maintained. FCC ID: L2V-STX3 ICES-003/(A/B) IC:3989A-STX3 R&TTE: TBR41 Complies with FCC standards. FOR HOME OR OFFICE USE

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