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SEPTENTRIO AsteRx-m2 - User Manual

SEPTENTRIO AsteRx-m2
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AsteRx-m2 Product Group
Hardware Manual
Version 1.5.0
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Summary

AsteRx-m2 OEM

2.1 Mounting

Details mounting holes, M3 screws, spacers, and grounding connections for the OEM module.

2.2 Environmental

Specifies operational temperature range (-40 to +85 °C) and storage temperature range (-55 to +85 °C).

2.3 Power and Power Consumption

Covers 3.3V power supply via 30-pin connector and power consumption based on GNSS signals.

2.4 RF Interface

Explains receiver RF signal input via ANTA/ANTB u.FL connectors and antenna selection logic.

2.4.1 Electrical Specifications

Lists electrical specs like antenna supply voltage, impedance, current limits, noise figure, and VSWR.

2.4.2 System Noise Figure and C;NO

Provides formulas for calculating system noise figure (NFsys) and C/N0 based on signal parameters.

2.5 I;O Connectors

Describes the 30-pin main and 60-pin auxiliary connectors, including pin functions and warnings.

2.5.1 30-pin Connector

Details the pinout for the 30-pin connector, covering power, USB, serial ports, and event inputs.

2.5.2 60-pin connector

Details the pinout for the 60-pin connector, including GPIO, Ethernet, and reference inputs.

2.6 External Frequency Reference Input (REF IN)

Explains using an external 10 MHz signal via pin 60 of the 60-pin connector for frequency synchronization.

2.7 Event;TimeSync inputs

Describes EventA/EventB inputs for timing external events and synchronizing the receiver's time base with 1PPS signals.

2.8 General Purpose Output (GPx)

Details GP1 and GP2 pins as programmable LVTTL digital outputs with a max drive current of 10mA.

2.9 Standby Mode

Explains two methods to enter standby mode: driving nPDN pin low or using the 'exePowerMode, StandBy' command.

2.10 SD Memory Card Usage

Covers using an external SD memory card for logging, compatibility up to 32GB, and FAT32 file system.

2.11 USB Interface

Details configuring the USB device interface for USB 1.1 (full speed) or USB 2.0 (high speed) modes.

2.12 Ethernet

Describes the receiver's 10/100 Base-T Ethernet support via the RMII interface on the 60-pin connector.

Development Kit

3.1 Header Types

Describes header pitches: 2.54mm for most, 2mm for J500 (PPS/EVENTS) and J501 (GP).

3.2 Powering the DevKit

Explains powering via USB Dev (4.5-5.5V) or POWER connector (5-36V), recommending specific USB cables.

3.3 Antenna Connectors

States antennas connect directly to OEM board u.FL connectors; explains Vant jumper for 5V or 3.3V.

3.4 LEDs and General Purpose Output Pins

Details DevKit status LEDs (POWER, GPLED, LOGLED) and 3.3V GP1/GP2 outputs on J501 header.

3.5 COM Ports

Describes four COM ports routed to DB9 connectors, conforming to RS232, with RTS/CTS on COM2/COM3.

3.6 PPS Out and Event Inputs

Explains PPSout signal from J500 header and EVENTA/EVENTB inputs via a buffer.

3.7 Ethernet

States DevKit supports 10/100 Base-T Ethernet but cannot be powered through the Ethernet connector.

3.8 USB Dev

Describes the USB Dev connector for powering the DevKit and communicating with the receiver over USB.

3.9 USB Host

This section is marked as 'Reserved'.

3.10 REF IN

Explains the REF IN connector for an external 10 MHz frequency reference input, detailing impedance and level.

3.11 Buttons

Details the nRST and LOGGING buttons for resetting the receiver and controlling logging, also connected to 2-pin headers.

3.12 SD Card Socket

Indicates the micro SD card socket on the DevKit for logging files, referencing section 2.10 for details.

Appendix A LED Status Indicators

Appendix B EMC Considerations

Summary

AsteRx-m2 OEM

2.1 Mounting

Details mounting holes, M3 screws, spacers, and grounding connections for the OEM module.

2.2 Environmental

Specifies operational temperature range (-40 to +85 °C) and storage temperature range (-55 to +85 °C).

2.3 Power and Power Consumption

Covers 3.3V power supply via 30-pin connector and power consumption based on GNSS signals.

2.4 RF Interface

Explains receiver RF signal input via ANTA/ANTB u.FL connectors and antenna selection logic.

2.4.1 Electrical Specifications

Lists electrical specs like antenna supply voltage, impedance, current limits, noise figure, and VSWR.

2.4.2 System Noise Figure and C;NO

Provides formulas for calculating system noise figure (NFsys) and C/N0 based on signal parameters.

2.5 I;O Connectors

Describes the 30-pin main and 60-pin auxiliary connectors, including pin functions and warnings.

2.5.1 30-pin Connector

Details the pinout for the 30-pin connector, covering power, USB, serial ports, and event inputs.

2.5.2 60-pin connector

Details the pinout for the 60-pin connector, including GPIO, Ethernet, and reference inputs.

2.6 External Frequency Reference Input (REF IN)

Explains using an external 10 MHz signal via pin 60 of the 60-pin connector for frequency synchronization.

2.7 Event;TimeSync inputs

Describes EventA/EventB inputs for timing external events and synchronizing the receiver's time base with 1PPS signals.

2.8 General Purpose Output (GPx)

Details GP1 and GP2 pins as programmable LVTTL digital outputs with a max drive current of 10mA.

2.9 Standby Mode

Explains two methods to enter standby mode: driving nPDN pin low or using the 'exePowerMode, StandBy' command.

2.10 SD Memory Card Usage

Covers using an external SD memory card for logging, compatibility up to 32GB, and FAT32 file system.

2.11 USB Interface

Details configuring the USB device interface for USB 1.1 (full speed) or USB 2.0 (high speed) modes.

2.12 Ethernet

Describes the receiver's 10/100 Base-T Ethernet support via the RMII interface on the 60-pin connector.

Development Kit

3.1 Header Types

Describes header pitches: 2.54mm for most, 2mm for J500 (PPS/EVENTS) and J501 (GP).

3.2 Powering the DevKit

Explains powering via USB Dev (4.5-5.5V) or POWER connector (5-36V), recommending specific USB cables.

3.3 Antenna Connectors

States antennas connect directly to OEM board u.FL connectors; explains Vant jumper for 5V or 3.3V.

3.4 LEDs and General Purpose Output Pins

Details DevKit status LEDs (POWER, GPLED, LOGLED) and 3.3V GP1/GP2 outputs on J501 header.

3.5 COM Ports

Describes four COM ports routed to DB9 connectors, conforming to RS232, with RTS/CTS on COM2/COM3.

3.6 PPS Out and Event Inputs

Explains PPSout signal from J500 header and EVENTA/EVENTB inputs via a buffer.

3.7 Ethernet

States DevKit supports 10/100 Base-T Ethernet but cannot be powered through the Ethernet connector.

3.8 USB Dev

Describes the USB Dev connector for powering the DevKit and communicating with the receiver over USB.

3.9 USB Host

This section is marked as 'Reserved'.

3.10 REF IN

Explains the REF IN connector for an external 10 MHz frequency reference input, detailing impedance and level.

3.11 Buttons

Details the nRST and LOGGING buttons for resetting the receiver and controlling logging, also connected to 2-pin headers.

3.12 SD Card Socket

Indicates the micro SD card socket on the DevKit for logging files, referencing section 2.10 for details.

Appendix A LED Status Indicators

Appendix B EMC Considerations

SEPTENTRIO AsteRx-m2 Specifications

General IconGeneral
Receiver TypeMulti-frequency GNSS Receiver
Supported GNSSGPS, GLONASS, Galileo, BeiDou, QZSS, SBAS
Update Rateup to 100 Hz
Velocity Accuracy0.03 m/s
Timing Accuracy (RMS)20 ns
Operating Temperature-40°C to +85°C
Frequency BandsL1, L2, L5
Heading Accuracy0.1 degrees
Input Voltage9-36 V DC
Power SupplyDC
InterfacesEthernet, USB
ProtocolsNMEA
Position Accuracy (RMS)1 cm + 1 ppm

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