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Danger

ESD Sensitivity

The mosaic-X5 GNSS receiver is sensitive to ESD. Use a proper grounding system to make sure that the working surface and the components are at the same electric potential.

ESD Precaution

As recommended by the manufacturer, we highly recommend that users take the necessary precautions to avoid damaging their module. For example, users can utilize the iFixit Anti-Static Wrist Strap.

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Active Antenna

Never inject an external DC voltage with the GNSS antenna, as it may damage the mosaic-X5 GNSS receiver. For instance, when using a splitter to distribute the antenna signal to several GNSS receivers, make sure that no more than one output of the splitter passes DC. Use DC-blocks otherwise.

Introduction

  • SparkPNT GNSS Flex Module - mosaic-X5 & IM19 IMU
    SKU: GPS-29457

    Product Thumbnail

  • SparkPNT GNSS Flex modules are plug-in boards featuring different GNSS receivers. They are designed to be easily swapped for repairs and pin-compatible for upgrades. The boards have two 2x10-pin, 2mm pitch female headers connecting to carrier boards. For the mosaic-X5 GNSS receiver, these pins will break out the USB, UART (x2), and SD card interfaces, along with the PPS and event signals using a standardized pinout. Additionally, these pins break out the two UART interfaces of the IM19 IMU.

    This SparkPNT GNSS Flex module features the Septentrio mosaic-X5, a compact, ultra-low power, multi-band, multi-constellation, high-precision GNSS receiver. The receiver supports the GPS (USA), GLONASS (Russia), Beidou (China), Galileo (Europe), and NavIC (India) constellations, including regional systems (i.e. SBAS and QZSS). With its Real Time Kinematics (RTK) capabilities, the module can achieve a horizontal accuracy of 6mm (~0.25in), vertical accuracy of 1cm (~0.4in) using RTK, and timing precision of 5ns (5 billionths of a second). It also features Septentrio's unique AIM+ technology for interference mitigation and anti-spoofing, ensuring best-in-class reliability and scalable position accuracy.

    The mosaic-X5 is a sophisticated module with an internal web server that can be utilized with any web browser. On the GNSS Flex module, the web server can be accessed through the USB data pins on the standard GNSS Flex headers. To guide users through the configuration options, Septentrio provides dozens of video tutorials about the web interface. For the users who prefer a command-line interface instead, Septentrio has you covered. Users can still control and configure the mosaic-X5 GNSS receiver through a CLI on the USB and UART interfaces, which is useful for scenarios such as production line testing (in fact, that is how we test this board) or remote access.

    Tilt Compensation

    The IM19 attitude module from Feyman (FMI) fuses MEMS IMU sensor data and GNSS RTK positioning to deliver high-precision attitude compensated measurements, with roll and pitch accurate to within 0.05 degrees. This kind of superb accuracy has widespread uses in industrial applications such as tilt RTK surveys (where RTK poles need not be held straight vertical as the IM19 can calculate a virtual digital level at any tilt angle), agriculture machine automation, and dead reckoning.

    When configured, fed with the mosaic-X5 Pulse-Per-Second signal and NMEA GGA, RMC, and GST messages; once calibrated, the IM19 will output proprietary NMEA messages containing the compensated position and roll, pitch and yaw. By default, the mosaic-X5 COM4 TX is linked to the IM19 UART2 RX to carry the required NMEA messages. However, this can be changed via jumper links on the Flex Module, if necessary.

mosaic-X5 Product Comparison

Below is a simple comparison table between our mosaic-X5 GNSS products and Septentrio's development and evaluation kits:

mosaic-X5 Development Kit
Product Thumbnail
mosaic-go Evaluation Kit
Product Thumbnail
mosaic-X5 GNSS Breakout
Product Thumbnail
RTK mosaic-X5
Product Thumbnail
mosaic-X5 Flex Module
Product Thumbnail
SparkPNT RTK Facet mosaic
Product Thumbnail
GNSS Antenna Dual Single (mosaic-X5)
Dual (mosaic-H) 		Single Single Single Integrated
USB Connector micro-B micro-B Type-C Type-C N/A* Type-C
Ethernet Yes
10/100 Base-T 		No No Yes
10/100 Base-T 		GNSS Flex Headers* No
WiFi No No No Yes - Network Bridge
10 Base-T 		No Yes - Network Bridge
10 Base-T
Tilt Compensasion No No No No Yes* No
COM Ports 4 2 4 1 - mosaic-X5
1 - ESP32 		4 1 - mosaic-X5
1 - ESP32
µSD Card Slot Yes Yes Yes Yes GNSS Flex Headers* Yes
Reset/Log Buttons Yes No* Yes Yes No Yes
Logic-Level 1.8V
3.3V 		3.3V 3.3V 3.3V
5V 		3.3V 3.3V
PPS Signal Header Pin 6-Pin JST Connector SMA Connector Screw Terminal GNSS Flex Headers* No
Enclosure Material N/A Metal N/A Aluminum N/A Plastic
Dimensions N/A 71 x 59 x 12mm ± 1mm 70.9 x 50.8 x 8mm 180.6 x 101.8 x 41mm
Enclosure Only 		44.5mm x 31.8mm x 10.4mm
Weight N/A 58g ± 1g 22.6g 415.15g
Enclosure Only 		GNSS Only: 14.0g
IMU: 15.2g

mosaic-go Evaluation Kit

The reset pin is exposed on 4-pin JST connector and the log pin is connected to the latch pin of the SD card slot.

mosaic-5 GNSS Flex Modules

SparkPNT GNSS Flex modules are modular, plug-in boards that utilize a carrier board to access the pins of the GNSS Flex headers.

  • The GNSS only variant of the SparkPNT GNSS Flex module includes a middle header that breaks out the Ethernet PHY interface of the mosaic-X5.
  • The IMU variant of the SparkPNT GNSS Flex module includes the IM19 IMU for RK tilt-compensation applications with the mosaic-X5.

Design Files

  • Design Files

  • Manipulate 3D Model
    Controls Mouse Touchscreen
    Zoom Scroll Wheel 2-Finger Pinch
    Rotate Left-Click & Drag 1-Finger Drag
    Move/Translate Right-Click & Drag 2-Finger Drag

    Board Dimensions
    Dimensions of the mosaic-X5 & IM19 GNSS Flex module.

    Need more measurements?

    For more information about the board's dimensions, users can download the KiCad files for this board. These files can be opened in KiCad and additional measurements can be made with the measuring tool.

    KiCad - Free Download!

    KiCad is free, open-source CAD program for electronics. Click on the button below to download their software. (*Users can find out more information about KiCad from their website.)

    📏 Measuring Tool

    This video demonstrates how to utilize the dimensions tool in KiCad, to include additional measurements:

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Board Layout

The GNSS Flex system is designed around two 2x10-pin, 2mm pitch headers used to mate the two types of boards. A standardized pin layout, keeps the ecosystem pin-compatible for upgrades and allows boards to be easily swapped for repairs. Depending on the capabilities of the GNSS receiver, these pins will breakout the USB, UART (x4), I2C, and SD card interfaces along with any PPS or event signals of the GNSS receiver.

The mosaic-X5 & IM19 GNSS Flex module has the following features:

Board Layout

Layout of the major components on the mosaic-X5 & IM19 GNSS Flex module.

  1. mosaic-X5 GNSS Receiver
    The Septentrio mosaic-X5 GNSS receiver
  2. GNSS Flex Headers
    Two sets of 2x10 pin, 2mm pitch female headers for connecting a GNSS Flex module to carrier boards
  3. IM19 IMU
    The Feyman IM19 attitude module to provide tilt compensation in surveying applications
  4. L1/L2/L5 U.FL Connector
    An U.FL connector for attaching an external GNSS antenna

mosaic-X5 GNSS Receiver

The centerpiece of the mosaic-X5 & IM19 GNSS Flex module, is the mosaic-X5 GNSS receiver from Septentrio. Their mosaic modules are low-power, multi-band, multi-constellation GNSS receivers capable of delivering centimeter-level precision at high update rates. The modules also feature Septentrio's unique AIM+ technology for interference mitigation and anti-spoofing, which ensures their best-in-class reliability and scalable position accuracy.

QR code to product video

  • mosaic-X5 GNSS receiver
    The mosaic-X5 GNSS receiver on the mosaic-X5 & IM19 GNSS Flex module.

Features:

  • Operating Voltage: 3.135 - 3.465V
  • Operating Temperature: -40 - 85°C
  • GNSS Support
    • GPS: L1C/A, L1PY, L2C, L2P, L5
    • GLONASS: L1CA, L2CA, L2P, L3 CDMA
    • Beidou: B1I, B1C, B2a, B2b, B2I, B3
    • Galileo: E1, E5a, E5b, E5 AltBoc, E6
    • QZSS: L1C/A, L1 C/B, L2C, L5
    • Navic: L5
    • SBAS: Egnos, WA
  • Antenna Specifications
    • Preamplification Range: 15-50dB
    • Bias Voltage: 3.0 - 5.5V
    • 448 Hardware Channels
  • Update Rate: 100Hz
  • Latency: < 10ms


  • Time to Fix
    • Cold Start: < 45s
    • Warm: < 20s
    • Reacquisition: 1s
  • Timing Precision: 5ns

  • Position Accuracy

    Correction Horizontal Vertical
    RTK 0.6cm (±0.5ppm)
    ~0.25"    		 1cm (±1ppm)
    ~.4"
    DGNSS 40cm
    ~1.3'    		 70cm
    ~2.3'
    SBAS 60cm
    ~2'    		 80cm
    ~2.6'
    Standalone 1.2m
    ~4'    		 1.9m
    ~6.2'

Info

The mosaic-X5 has three power modes: Active, Standby, and Off (see the Power Modes section).

Power Modes

The mosaic-X5 GNSS receiver operates in three different power states.

  • Off - The module is completely turned off
    • When transitioning to the Off state from Active, recent data may not be lost and not logged to the external SD card
  • Standby - The module is in a low-power consumption mode (1)
    • The module power consumption in standby is <5mW
    • The PMIC_ON_REQ pin is driven LOW
    • The MODULE_RDY pin is in a LOW
    • Monitors the state of the ONOFF pin (Not available)
  • Active - The module is operating with all functions active
    • On power up, the module restarts in the configuration stored in the boot configuration file
    • The PMIC_ON_REQ pin is driven HIGH
    • The MODULE_RDY pin is in a HIGH (2)
  1. Essentially, the same state as Off; except in the transition to the Standby mode, before the module shuts down:
    • All logging tasks are terminated
    • The SD card is unmounted
    • The PMIC_ON_REQ pin is driven LOW
  2. Level becomes HIGH about 300ms after powering up, reset, or waking up from standby

Info

By default, the board is hardwired to operate only in the Active and Off modes.

For more information on the power management of the mosaic-X5 GNSS receiver, please refer to sections 3.4, 3.5, 4.1, and 4.13 of the hardware manual.

Enabling Standby Mode

Users can enable Standby mode on the mosaic-X5, by modifying the V_BATT jumper (see the Jumpers section) and providing an external power source for the V_BATT pin (3.3V). However, because the ONOFF pin isn't exposed users will need to power cycle the board to return to the Active state.

Drive Current - PMIC_ON_REQ/MODULE_RDY

The drive current on the PMIC_ON_REQ and MODULE_RDY pins is low. Enough to be read by a digital pin on a microcontroller, but not high enough to drive an LED.

Power Consumption

The power consumption of the mosaic-X5 GNSS receiver depends on the GNSS signals enabled and the positioning mode. The table below, lists the average power consumption for common configurations. The current listed, is based on a supply voltage of 3.3V.

GNSS Signals Positioning Mode Power (mW) Current (mA)
GPS L1 C/A Stand-Alone (1Hz) 550 167
GPS L1/L2 RTK (1Hz) 670 203
GPS/GLONASS L1/L2 RTK (1Hz) 695 211
GPS/GLONASS L1/L2+GALILEO L1/E5a +BeiDou B1C/B2a RTK (1Hz) 850 258
GPS/GLONASS L1/L2+GALILEO L1/E5a +BeiDou B1C/B2a RTK (100 Hz) 930 282
GPS/GLONASS L1/L2 + L-band PPP (1Hz) 760 230
All signals from all GNSS constellations Static (1Hz) 910 276
All signals from all GNSS constellations +L-band Static(1Hz) 980 297
All signals from all GNSS constellations +L-band Static (100Hz) 1080 327

Source: mosaic-X5 Hardware Manual

Frequency Bands

The mosaic modules are multi-band, multi-constellation GNSS receivers. Below, are charts illustrating the frequency bands utilized by all the global navigation satellite systems and the ones supported by the mosaic-X5 GNSS receiver.

Supported frequency bands

The frequency bands supported by the mosaic-X5 GNSS receiver.

GNSS frequency bands

Frequency bands of the global navigation satellite systems. (Source: Tallysman)

Info

For a comparison of the frequency bands supported by the mosaic modules, refer to section 3.1 of the hardware manual.

What are Frequency Bands?

A frequency band is a section of the electromagnetic spectrum, usually denoted by the range of its upper and lower limits. In the radio spectrum, these frequency bands are usually regulated by region, often through a government entity. This regulation prevents the interference of RF communication; and often includes major penalties for any interference with critical infrastructure systems and emergency services.

GNSS frequency bands
Frequency bands of the global navigation satellite systems. (Source: ESA)

However, if the various GNSS constellations share similar frequency bands, then how do they avoid interfering with one another? Without going too far into detail, the image above illustrates the frequency bands of each system with a few characteristics specific to their signals. Wit these characteristics in mind, along with other factors, the chart can help users to visualize how multiple GNSS constellations might co-exist with each other.

For more information, users may find these articles of interest:

Position Accuracy

The accuracy of the position reported from the mosaic-X5 GNSS receiver, can be improved based upon the correction method being employed. Currently, RTK corrections provide the highest level of accuracy; however, users should be aware of certain limitations of the system:

  • RTK technique requires real-time correction data from a reference station or network of base stations.
    • RTK corrections are signal specific (i.e. an RTK network might provide corrections on only E5b and not E5a).
  • The range of the base stations will vary based upon the RTK method being employed.
  • The reliability of RTK corrections are inherently reduced in multipath environments. However, with Septentrio's multipath mitigation technology (APME+) on the mosaic-X5, these errors are significantly reduced when compared to multipath mitigation techniques that modify the correlators in the tracking channels.
Correction Horizontal Vertical
RTK 0.6cm (±0.5ppm)
~0.25"		 1cm (±1ppm)
~.4"
DGNSS 40cm
~1.3'		 70cm
~2.3'
SBAS 60cm
~2'		 80cm
~2.6'
Standalone 1.2m
~4'		 1.9m
~6.2'
IM19 Attitude Module

When configured and calibrated, the IM19 attitude module can fuses IMU sensor and GNSS RTK positioning data to deliver compensated position. The accuracy, displayed in the table below, should also be considered when implemented.

Tilt Angle Accuracy
0° - 30° 1cm
<60° 2cm
RTK Corrections

To understand how RTK works, users will need a more fundamental understanding of the signal error sources.

Tip

For the best performance, we highly recommend that users configure the module to utilize/provide RTK corrections with a compatible L1/L2/L5/L6 GNSS antenna and utilize a low-loss cable.

IM19 IMU

The other centerpiece of the GNSS Flex module is the IM19 attitude module from Feyman Inc., which fuses MEMS sensor and GNSS RTK positioning data to deliver high-precision attitude measurement, with roll and pitch accurate to within 0.05 degrees. This kind of superb accuracy has widespread uses in industrial applications such as tilt RTK surveys (where RTK poles need not be held straight vertical as the IM19 can calculate a virtual digital level at any tilt angle), agriculture machine automation, and dead reckoning.

When configured, fed with the LG290P Pulse-Per-Second signal and NMEA GGA, RMC, and GST messages; once calibrated, the IM19 will output proprietary NMEA messages containing the compensated position and roll, pitch and yaw. By default, the mosaic-X5 COM4 TX is linked to the IM19 UART2 RX to carry the required NMEA messages. However, this can be changed via jumper links on the Flex Module, if necessary.

  • IM19 attitude module
    The IM19 attitude module on the LG290P GNSS Flex module.

Features:

  • Self-calibration Technique
  • Initialization: <2s
  • Power: 0.33W
  • Data Rate: 100Hz
  • Attitude Accuracy: ±0.05° (Pitch/Roll)
  • Heading Accuracy: ±0.5° (Yaw)


  • Gyroscope
    • Bias Stability: ±0.2°/s
    • Range: ±1000°/s
  • Accelerometer
    • Bias Stability: ±5mg
    • Range: ±8g

Info

Please refer to the hookup guide linked below, for the operation of the IM19 attitude module in tilt-compensation applications:

Position Accuracy

When configured and calibrated, the IM19 attitude module can fuses its IMU sensor data with the received GNSS RTK positioning data to deliver a tilt compensated position.

Tilt Angle Accuracy
0° - 30° 1cm
<60° 2cm
mosaic-X5 GNSS receiver

The accuracy of the position reported from the mosaic-X5 GNSS receiver, can be improved based upon the correction method being employed. Currently, RTK corrections provide the highest level of accuracy. Its accuracy, displayed in the table below, should also be considered when implemented.

Correction Horizontal Vertical
RTK 0.6cm (±0.5ppm)
~0.25"		 1cm (±1ppm)
~.4"
DGNSS 40cm
~1.3'		 70cm
~2.3'
SBAS 60cm
~2'		 80cm
~2.6'
Standalone 1.2m
~4'		 1.9m
~6.2'

GNSS Flex Headers

The GNSS Flex system is designed around two 2x10-pin, 2mm pitch headers used mate the two types of boards. A standardized pin layout, keeps the ecosystem pin-compatible for upgrades and allows boards to be easily swapped for repairs. For the mosaic-X5 GNSS receiver, these pins will breakout the USB, UART (x4), and SD card interfaces along with a configurable PPS signal, two event signals, and two LED status indication signals from the GNSS receiver.

ZED-X20P I/O pins

The peripherals and I/O pins for the mosaic-X5 GNSS receiver.

IM19 I/O pins

The peripherals and I/O pins for the IM19 attitude module.

Below, are the features that are available from the mosaic-X5 GNSS receiver.

Supported Interfaces:

  • 4x UART (LVTTL, up to 4 Mbps) (1)
  • Ethernet (RMII/MDIO), 10/100 Mbps (2)
  • USB device (2.0, HS)
  • SDIO (mass storage)
  • 2x GPIO user programmable (3)
  • 2x LED outputs
  • 2x Event markers
  • 1x Configurable PPS out
  1. One of the four UART ports is piped to the IM19 module
  2. Not available on the mosaic-X5 & IM19 GNSS Flex module.
  3. Not available on the mosaic-X5 & IM19 GNSS Flex module.

Below, are the features that are available from the IM19 attitude module.

Supported Interfaces:

  • UART (x2)
  • Timing Signal (1)
  1. The timing signal is amplified from the mosaic-X5 GNSS receiver

For most users, this will be the primary interface for the mosaic-X5 GNSS receiver.

USB interface
USB interface on the mosaic-X5 & IM19 GNSS Flex module.

  • When a module is initially connected to a computer, the board will initialize as a USB mass storage device.
    • For Windows PCs, the USB driver (1) can be installed from the mass storage device or the RxTools software suite.
    • When the SD card is mounted, this drive will contain the contents of the SD card that is inserted on the board.
  • Once the USB driver is installed:
    • Two virtual COM ports are emulated, which can be used as standard COM ports to access the receiver.
    • This interface will support Ethernet-over-USB.
      • By default, the receiver is not allowed to access the Internet over USB.
      • The IP address allocated to the Ethernet-over-USB interface is 192.168.3.1.
        • The IP address cannot be changed; therefore, only single receiver should be connected to your computer at a time.
  1. On Linux, the standard Linux CDC-ACM driver is suitable.

The headers of the GNSS Flex system supports up to four UART ports. On this GNSS Flex module, these are connected to both the GNSS receiver and IM19 attitude module as shown in the table below.

mosaic-X5 IM19 Pins of GNSS Flex Headers
UART1 ---- TXD1/RXD1
UART2 ---- TXD2/RXD2
---- UART1 TXD3/RXD3
---- UART2 - TX TXD4
UART4 - TX UART2 - RX ----

The default UART port connections between the mosaic-X5, IM19, and GNSS Flex header pins.

UART interface
The UART ports on the mosaic-X5 & IM19 GNSS Flex module.

mosaic-X5

The mosaic-X5 GNSS receiver has four UARTs ports, which can be operated and configured separately. However, only the UART1 and UART2 ports of the mosaic-X5 are available from the headers pins of the GNSS Flex module. The other two UART ports of GNSS Flex system are reserved for the IM19 attitude module.

GNSS UART interface
The UART ports from the mosaic-X5 on the GNSS Flex module.

  • The UART1 and UART2 ports of the mosaic-X5 GNSS receiver are broken out to the headers of the GNSS Flex system, on pins TXD1/RXD1/RTS1/CTS1 and TXD2/RXD2/RTS2/CTS2 respectively.
    • These can be used to interact with the GNSS receiver.
    • These ports feature flow control pins, which are disabled by default.
    • These ports support a point-to-point protocol server, by which it can accept TCP/IP connections over a serial link.
  • The TX pin of the UART4 port from the mosaic-X5 GNSS receiver is also piped directly to the RX pin of the IM19 attitude module's UART2 port.

Default Configuration

  • Baudrate: 115200bps
  • Data Bits: 8
  • Parity: No
  • Stop Bits: 1
  • Flow Control: None

IM19

The IM19 attitude module has two UART ports, which operate separately; and are available from the headers pins of the GNSS Flex module. The other two UART ports of GNSS Flex system are reserved for the mosaic-X5 GNSS receiver. To provide an accurate tilt compensated position, the IM19 attitude module also requires a PPS signal that corresponds with the GNSS solutions.

IM19 UART interface
The UART ports from the IM19 on the GNSS Flex module.

  • The UART1 port of the IM19 module is broken out to the headers of the GNSS Flex system, on pins TXD3 and RXD3.
    • These pins should be used to configure the IM19 module.
  • The UART2 port of the IM19 module is used to receive RTK data from the GNSS receiver and output the tilt compensated data.
    • By default, the RX pin receives data from the UART4 port of the mosaic-X5 GNSS receiver.
      • Users can modify the jumpers on the top of the GNSS Flex module, to utilize the TX pin from the UART1 or UART2 ports of the mosaic-X5 GNSS receiver (i.e. the TXD1 or TXD2 pins); or the RXD4 pin of the GNSS Flex headers instead.
    • Once IM19 module is configured and calibrated, the TX pin outputs the tilt compensated data to the TXD4 pin on the GNSS Flex headers.

Default Configuration

By default, the UART ports are configured with the following settings:

  • Baudrate: 115200bps
  • Data Bits: 8
  • Parity: No
  • Stop Bits: 1
  • Flow Control: None
  • Protocols:
    • AT Commands
    • Proprietary Data Formats
      • MEMS Raw data protocol
      • GNSS Raw data protocol
      • Binary NAVI positioning data protocol

From the mosaic-X5, the PPS output signal's logic-level is 1.8V, but we have added a buffer to bumped up the signal's logic-level to 3.3V. The signal is then connected to the IM19 attitude module and PPS1 pin of the GNSS Flex module. In order to receive tilt-compensated data from the IM19 attitude module, this pin needs to be configured to provide a timing pulse at the same rate as the PVT solutions.

I/O for PPS signal
The PPS signal output on the mosaic-X5 & IM19 GNSS Flex module.

The data logging functionality of the board can be configured through the software/web interfaces.

Data logging components
The data logging peripherals on the mosaic-X5 & IM19 GNSS Flex module.

Initial Configuration

Before data logging can occur, it is necessary to create a logging stream from the Logging tab of the web interface or using the RxTools software suite. Streams can contain NMEA or SBF (Septentrio Binary Format) data; SBF can contain RTCM and/or RINEX.

SD Card Specifications

The mosaic-X5 GNSS receiver is only compatible with SD cards of up to 32GB, formatted with a FAT32 file system.

Standby Mode

When Standby mode is initialized, the module terminates all running processes and unmounts the external SD card to avoid any log file corruption (see the Power Modes section).

The mosaic-X5 GNSS receiver features two general purpose, output LED pins. These pins have a maximum output current of 10 mA and output impedance of 20Ω.

LED pins
The LED pins on the mosaic-X5 & IM19 GNSS Flex module.

The mosaic-X5 GNSS receiver features two general purpose, event input pins. These pins can be used to time tag external events with a time resolution of 20ns.

General use pins
The event pins on the mosaic-X5 & IM19 GNSS Flex module.

U.FL Connector

Users will need to connect a compatible GNSS antenna to the L1\L2\L5 U.FL connector. The type of antenna used with the mosaic-X5 GNSS receiver affects the overall accuracy of the positions calculated by the GNSS receiver.

  • Passive antennas are not recommended for the mosaic-X5 GNSS receiver.

  • There is no need to inject an external DC voltage for the GNSS antenna. Power is already provided from the mosaic-X5 GNSS receiver for the LNA of an active antenna.

    Danger

    Never inject an external DC voltage into the SMA connector for the GNSS antenna, as it may damage the mosaic-X5 GNSS receiver. For instance, when using a splitter to distribute the antenna signal to several GNSS receivers, make sure that no more than one output of the splitter passes DC. Use DC-blocks otherwise.

GNSS antenna input

The U.FL connector to attach an external GNSS antenna to the mosaic-X5 & IM19 GNSS Flex module.

Tip

For the best performance, we recommend users choose a compatible L1/L2/L5/L6 GNSS antenna and utilize a low-loss cable. Also, don't forget that GNSS signals are fairly weak and can't penetrate buildings or dense vegetation. The GNSS antenna should have an unobstructed view of the sky.

Jumpers

There are two jumpers on the back of the board that can be used to easily modify the hardware connections on the board.

Never modified a jumper before?

Check out our Jumper Pads and PCB Traces tutorial for a quick introduction!

Jumpers

The jumpers on the top of the mosaic-X5 & IM19 GNSS Flex module.

  • IMU GNSS Source
    These four jumpers can be modified to change the source of the GNSS data for the IM19 attitude module.

Jumpers

The jumpers on the bottom of the mosaic-X5 & IM19 GNSS Flex module.

  • 2V8
    This jumper can be cut to disconnect power to the internal 10MHz TXCO.
  • REF
    This jumper can be cut to disconnect the 10MHz reference signal from the internal TXCO.

Jumpers signals

The signals from the mosaic-X5 GNSS receiver to the 2V8 and REF jumpers on the board.