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Introduction

  • 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 ZED-X20P GNSS receiver, these pins will break out the USB, UART (x2), and I2C interfaces, along with the PPS and event signals using a standardized pinout. When populated, these pins also break out the two UART interfaces of the IM19 attitude module.

    These SparkPNT GNSS Flex Module combines the powerful u-blox ZED-X20P all-band RTK-capable GNSS receiver with an optional IM19 attitude module, which features an inertial measurement unit (IMU) for tilt compensation or dead reckoning. The ZED-X20P module is an all-band, high precision GNSS receiver that concurrently processes signals from the GPS, Galileo, BeiDou, QZSS, and NavIC constellations across all GNSS frequency bands, including L-band. With positioning algorithms for Real-time Kinematics (RTK), PPP-RTK, and Precise Point Positioning* (PPP) technologies, the module supports standard RTCM corrections for Virtual Reference Stations (VRS) in a Network RTK setup or a local base station setup. Additionally, L-band correction services are natively supported without the need to integrate an external receiver, such as the NEO-D9S.

    With its very high update rate, the ZED-X20P module is ideal for control applications, ensuring smooth and reliable operation. The module also protects system integrity with multi-layered defenses, including a Root of Trust, jamming and spoofing detection, cryptographic authentication of navigation messages through Galileo OSNMA, and more. This represents the highest level of integration in a single-chip receiver for the navigation and robotics markets; in unmanned autonomous vehicles (UAVs), guidance systems, and auto-steering applications.

    Optional IM19 Attitude Module

    The optional, 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 ZED-X20P 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 ZED-X20P UART1 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.

    Note

    *: Feature is still under development

    The USB interface does not fully comply with industry standards and is not suitable for certification/production use. However, the USB 2.0 FS (full speed, 12 Mbit/s) interface can be used for host communication in development purposes.

    GPS L5 Signals

    The GPS L5 signals are currently, considered as "pre-operational" and not utilized by default in navigation solutions. However, it is possible override the receiver's configuration to evaluate the GPS L5 signals. Please refer to the integration manual for more details.

    This is an operational limitation of the satellite/space segment and not an issue of the u-blox product.

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 ZED-X20P 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:

    QR code to play video

Board Layout

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 board 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 ZED-X20P GNSS Flex module has the following features:

Layout

Layout of the major components on the ZED-X20P GNSS Flex module.

  1. ZED-X20P GNSS Receiver
    The u-blox ZED-X20P 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 (optional)
    An optional Feyman IM19 attitude module to provide tilt compensation in surveying applications
  4. Antenna L1/L2/L5/E6 U.FL Connector
    An U.FL connector for attaching an external GNSS antenna

ZED-X20P GNSS Receiver

The centerpiece of this GNSS breakout board is the ZED-X20P module from u-blox; it features their latest X20 GNSS engine, a successor to their popular F9 engine. The ZED-X20P module is an all-band, high precision GNSS receiver that concurrently processes signals from the GPS, Galileo, BeiDou, QZSS, and NavIC constellations across all GNSS frequency bands, including L-band. With positioning algorithms for Real-time Kinematics (RTK), PPP-RTK, and Precise Point Positioning* (PPP) technologies, the module supports standard RTCM corrections for Virtual Reference Stations (VRS) in a Network RTK setup or a local base station setup. Additionally, L-band correction services are natively supported without the need to integrate an external receiver, such as the NEO-D9S.

With its very high update rate, the ZED-X20P module is ideal for control applications, ensuring smooth and reliable operation. The module also protects system integrity with multi-layered defenses, including a Root of Trust, jamming and spoofing detection, cryptographic authentication of navigation messages through Galileo OSNMA, and more. The module also accommodates users with a diverse choice of interfaces including USB, UART, SPI, and I2C.

QR code to play video

  • ZED-X20P module
    The ZED-X20P module on the breakout board.

Note

*: Feature in development

ZED-X20P module

Exploded view of the ZED-X20P GNSS receiver.

Features:

  • GNSS Constellations and SBAS Systems:
    • USA: GPS + WASS
    • EU: Galileo + EGNOS
    • China: BDS + BDSDAS
    • Japan: QZSS + MSAS
    • India: NavIC + GAGAN
  • Features
    • Programmable flash memory
    • Carrier phase output
    • Jamming detection
    • Galileo OSNMA
    • Secure boot
  • Services:
    • AssistNow
    • PointPerfect
  • Interfaces:
    • USB
    • UART x2
    • SPI
    • I2C
    • Digital I/O
      • TIMEPULSE configurable: 0.25 - 10MHz
      • EXTINT input for Wakeup


  • Supply voltage: 2.7V to 3.6V
  • Sensitivity
    • Tracking and Nav.: -167dBm
    • Reacquisition: -160dBm
    • Cold start: -148dBm
    • Hot start: -157dBm
  • Operational Limits
    • Dynamics: <4g
    • Altitude: 80,000m
    • Velocity: 500m/s
    • Update Rate: Up to 25Hz
    • Temperature: -40°C to 85°C
  • Dynamic Accuracy
    • Velocity: 0.05m/s
    • Heading: 0.3°
  • Time to Fix
    • Cold Start: <27s
    • Aided Start: <2s
    • Hot Start: 2s
  • Convergence time:
    • RTK: <10s
    • SPARTN: <50s
  • Dimensions: 17.0mm x 22.0mm x 2.4mm

Power Consumption

The power consumption of the ZED-X20P module depends on the GNSS signals enabled and if the module is acquiring or tacking those signals. The table below, lists the average current consumption with a supply voltage of 3.3V.

GNSS Signals Acquisition Tracking
GPS+GAL+BDS 75mA 70mA
GPS 50mA 50mA

Tip

During acquisition, the current consumption may reach up to 85mA; make sure the primary power source can sustain this.

Info

For more information, please refer to the ZED-X20P Datasheet.

Frequency Bands

The ZED-X20P module is an all-band, high precision GNSS receiver that concurrently processes signals from the GPS, Galileo, BeiDou, QZSS, and NavIC constellations across all GNSS frequency bands, including L-band. Below, are the frequency bands provided by all the global navigation satellite systems and the ones supported by the ZED-X20P module.

Supported frequency bands

The frequency bands supported by the ZED-X20P GNSS receiver.

Constellation Frequency Bands
GPS L1C/A, L2C, L5
QZSS L1C/A, L1C/B*, L2C, L5, L6
GAL E1B/C, E5a, E6
BDS B1I, B1C, B2a, B3I
NavIC L1*, L5
SBAS L1C/A

The supported frequency bands, organized by constellation.

Note

*: Feature in development

GNSS frequency bands

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

Configuration Settings

Each GNSS constellations and their signal bands can be enabled or disabled independently, using keys from the CFG-SIGNAL-* configuration group; except for the QZSS and SBAS constellation. A GNSS constellation is considered to be enabled when the constellation enable key is set and at least one of the constellation's band keys is enabled. However, the ZED-X20P only supports certain combinations of constellations and bands. For all GNSS constellations, the L1 band is mandatory even in combination with another frequency band. Any unsupported combinations will be rejected with a UBX-ACK-NAK and the warning: inv sig cfg will be sent via UBX-INF and NMEA-TXT messages (if enabled).

Supported Combinations
Constellation key
CFG-SIGNAL-GAL_ENA		 Band key
CFG-SIGNAL-GAL_E1_ENA		 Band key
CFG-SIGNAL-GAL_E5A_ENA		 Band key
CFG-SIGNAL-GAL_E6_ENA		 Constellation enabled?
true (1) true (1) true (1) true (1) yes
true (1) true (1) true (1) false (0) yes
true (1) true (1) false (0) true (1) yes
true (1) true (1) false (0) false (0) yes
true (1) false (0) true (1) true (1) no
true (1) false (0) false (0) true (1) no
true (1) false (0) true (1) false (0) no
true (1) false (0) false (0) false (0) no
false (0) true (1) true (1) true (1) no
false (0) true (1) true (1) false (0) no
false (0) true (1) false (0) true (1) no
false (0) false (0) true (1) true (1) no
false (0) false (0) false (0) true (1) no
false (0) false (0) true (1) false (0) no
false (0) true (1) false (0) false (0) no
false (0) false (0) false (0) false (0) no
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 ZED-X20P GNSS module, 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 usually come from RTCM messages that are signal specific (i.e. an RTK network may only provide corrections for specific signals; only E5b and not E5a).
  • The range of the base stations will vary based upon the method used to transmit the correction data.
  • The reliability of RTK corrections are inherently reduced in multipath environments.
Correction Method Horizontal (CEP) Vertical (Median)
PVT 1.2m (~3.9') 2.0m (~6.6')
SBAS 0.6m (~2.0') 1.0m (~3.3')
RTK 1cm (~0.39") +1ppm 1cm (~0.39") +1ppm
SPARTAN <6cm (~2.36") <10cm (~3.94")
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 (Optional)

The other centerpiece of the GNSS Flex module is an optional IM19 attitude module from Feyman Inc.. Users have the option to purchase a board variant that comes populated with the IM19 attitude module, which 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 ZED-X20P 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 ZED-X20P UART1 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.

  • Without IM19 attitude module
    Without the IM19 attitude module populated on the ZED-X20P GNSS Flex module.

  • With IM19 attitude module
    The IM19 attitude module populated on the ZED-X20P GNSS Flex module.

Features:

  • Power: 0.33W
  • Data Rate: 100Hz
  • IMU Accuracy: ≤1% * D（1σ, vehicle)
  • Gyroscope
    • ARW: 0.17°/√(h)
    • Bias Stability: ±4.5°/h
    • Range: ±1000°/s


  • Accelerometer
    • Speed RW: 0.04m/s/√(h)
    • Bias Stability: ±0.3mg
    • Range: ±16g
  • Roll and Pitch: ≤0.02°（1σ）
  • Heading/Yaw: ≤0.2°（1σ）
  • Initialization: 1s (95%)
  • Self-calibration Technique

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
ZED-X20P GNSS Module

The accuracy of the position reported from the ZED-X20P GNSS module, 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 Method Horizontal (CEP) Vertical (Median)
PVT 1.2m (~3.9') 2.0m (~6.6')
SBAS 0.6m (~2.0') 1.0m (~3.3')
RTK 1cm (~0.39") +1ppm 1cm (~0.39") +1ppm
SPARTAN <6cm (~2.36") <10cm (~3.94")

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 ZED-X20P GNSS receiver, these pins will breakout the UART interface along with three of the programmable I/O pins; the LNA enable pin is not broken out and the safe-boot pin is only exposed as a test point on this board.

ZED-X20P I/O pins

The peripherals and I/O pins for the ZED-X20P 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 ZED-X20P GNSS receiver.

Supported Interfaces:

  • USB
  • UART x2 (1)
  • I2C
  • 1x External interrupt
  • 1x PPS output signal
  • 1x RTK Stat pin
  • 1x Geo Stat pin
  • 1x Reset pin
  1. One of the three UART ports is piped to the IM19 module

Note

All the input pins on the ZED-X20P GNSSS module have internal pull-up resistors; in normal operation, they can be left floating if unused.

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

Supported Interfaces:

  • UART (x2)
  • Timing Signal (1)
  1. The timing signal comes from the ZED-X20P GNSS module

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.

UART interface
The UART ports on the ZED-X20P GNSS Flex module.

ZED-X20P

The ZED-X20P GNSS receiver has two UART ports, which can be operated and configured separately.

GNSS UART interface
The UART ports from the ZED-X20P on the GNSS Flex module.

  • The UART1 and UART2 ports of the ZED-X20P GNSS module are broken out to the headers of the GNSS Flex system. These can be used to interact with the ZED-X20P.
  • The TX pin of the UART1 port from the ZED-X20P GNSS module is also piped directly to the RX pin of the IM19 attitude module's UART2 port.

Warning

Firmware updates can only be performed with the UART1 interface.

Configuration

The UART interfaces can be configured with the CFG-UART* messages:

  • Baudrate: 4800 to 8000000bps (Default: 38400bps)
  • Data Bits: 8
  • Parity: No
  • Stop Bits: 1
  • Flow Control: None
  • Protocols:
    • Input messages: NMEA (GGA, GLL, GSA, GSV, RMC, VTG, and TXT), RTCM, SPARTN, and UBX
    • Output messages: NMEA, RTCM, and UBX
ZED-X20P Pins of GNSS Flex Headers
UART1 TXD1/RXD1
UART2 TXD2/RXD2

Supported Protocols

The UART interfaces support the following protocols:

  • UART1 Output
    • NMEA protocol with GGA, GLL, GSA, GSV, RMC, VTG, TXT messages are output by default.
    • UBX and RTCM 3.4 protocols are enabled by default, but no output messages are enabled by default.
  • UART1 Input
    • UBX, NMEA and RTCM 3.4 input protocols are enabled by default.
  • UART2 Output
    • RTCM 3.4 protocol is enabled by default, but no output messages are enabled by default.
    • NMEA protocol is disabled by default.
  • UART2 Input
    • NMEA, RTCM 3.4, and SPARTN protocols are enabled by default.

Tip

A UART RX interface will be disabled when more than 100 frame errors are detected during a one-second period. This can happen if the wrong baud rate is used or the UART RX pin is grounded. An error message appears when the UART RX interface is reenabled at the end of the one-second period.

IM19

The IM19 attitude module has two UART ports, which operate separately.

IM19 UART interface
The UART ports from the IM19 on the ZED-X20P 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 GNSS data from the GNSS receiver and output the tilt compensated data.
    • By default, the RX pin receives data from the UART1 port of the ZED-X20P GNSS module.
      • Users can modify the jumpers on the top of the GNSS Flex module, to utilize the TXD2 or RXD4 pins (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
IM19 Pins of GNSS Flex Headers
UART1 TXD3/RXD3
UART2 TXD4

The PPS1 pin is connected to the TIMEPULSE output signal from the ZED-X20P GNSS receiver and the PPS input for the IM19 attitude module. The period, length, and polarity (rising or falling edge) of the TIMEPULSE signal can be configured with the CFG-TP-* messages. 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 ZED-X20P GNSS Flex module.

Note

The SAFEBOOT_N and TIMEPULSE (PPS) pins are internally connected in the ZED-X20P GNSS module, by a 1kΩ series resistor. When the SAFEBOOT_N pin is pulled LOW at starup, the ZED-X20P module will enter safeboot mode. Therefore, these pins have no load that could pull them low at startup; otherwise, the receiver will enter its safeboot mode.

The ZED-X20P supports a single I2C interface. If available, this interface can be accessed through Qwiic connectors on a GNSS Flex "carrier" board.

I2C interface
The I2C interface on the ZED-X20P GNSS Flex module.

What is Qwiic?

Qwiic Logo - light theme Qwiic Logo - dark theme

The Qwiic connect system is a solderless, polarized connection system that allows users to seamlessly daisy chain I2C boards together. Play the video below to learn more about the Qwiic connect system or click on the banner above to learn more about Qwiic products.

Features of the Qwiic System

no soldering - light theme no soldering - dark theme

Qwiic cables (4-pin JST) plug easily from development boards to sensors, shields, accessory boards and more, making easy work of setting up a new prototype.

polarized connector - light theme polarized connector - dark theme

There's no need to worry about accidentally swapping the SDA and SCL wires on your breadboard. The Qwiic connector is polarized so you know you’ll have it wired correctly every time, right from the start.

The PCB connector is part number SM04B-SRSS (Datasheet) or equivalent. The mating connector used on cables is part number SHR04V-S-B or an equivalent (1mm pitch, 4-pin JST connector).

daisy chainable - light theme daisy chainable - dark theme

It’s time to leverage the power of the I2C bus! Most Qwiic boards will have two or more connectors on them, allowing multiple devices to be connected.

The ZED-X20P supports external interrupts through its EXTINT pin. This is useful for waking the module up from its standby mode or for timing applications.

Event I/O pin
The EVENTA pin on the ZED-X20P GNSS Flex module.

Tip

All the inputs of the ZED-X20P have internal pull-up resistors in normal operation and can be left open if unused.

The RESET pin is connected to the reset pins of the ZED-X20P and IM19 modules.

  • Driving the pin LOW for at least 1ms triggers a cold-start reset, clearing the BBR content (receiver configuration, real-time clock (RTC), and GNSS orbit data) of the ZED-X20P GNSS receiver.
  • Driving the pin LOW for at least 100ms triggers a restart of the IM19 attitude module.

Reset I/O pin
The RESET pin on the ZED-X20P GNSS Flex module.

Info

Capacitors should not be placed between RESET and GND; otherwise, it could trigger a reset on startup.

Tip

All the inputs of the ZED-X20P have internal pull-up resistors in normal operation and can be left open if unused.

The RTK_STAT and GEOFENCE_STAT signals from the ZED-X20P GNSS receiver are broken out to the RTK and PVT pins of the GNSS Flex headers.

Indicator I/O pins
The signal pins for the RTK and PVT indicators on the ZED-X20P GNSS Flex module.

RTK

The RTK_STAT signal indicates the RTK positioning status and if a stream of valid correction messages is being received.

Pin State

  • HIGH - Indicates that RTK fixed mode has been achieved
  • Blinking - Indicates that a valid stream of correction messages is being received and utilized, but no RTK fixed mode has been achieved
  • LOW - Indicates that no carrier phase solution is available
PVT

The GEOFENCE_STAT signal indicates the current geofence status as to whether the receiver is inside any of the active areas. It is possible to configure up to four circular areas as geofence locations. Once configured, the receiver continuously compares its current position with the preset geofenced areas.

The receiver toggles the assigned pin according to the combined geofence state.

  • Inside - The position is inside the geofence with the configured confidence level
  • Outside - The position lies outside of the geofence with the configured confidence level
  • Unknown - There is no valid position solution or the position uncertainty does not allow for unambiguous state evaluation

Pin State

  • HIGH - The GEOFENCE_STAT pin is always set to high level when the combined geofence state is unknown
  • Low - A low level can represent either an inside or outside state based upon the CFG-GEOFENCE-PINPOL configuration

Tip

All the inputs of the ZED-X20P have internal pull-up resistors in normal operation and can be left open if unused.

U.FL Connector

Users will need to connect a compatible GNSS antenna to the L1/L2/L5/L6/L-Band U.FL connector. The type of antenna used with the ZED-X20P module affects the overall accuracy of the positions calculated by the GNSS receiver.

  • Passive antennas are not recommended for the ZED-X20P GNSS module.
  • There is no need to inject an external DC voltage for the GNSS antenna. Power is already provided from the ZED-X20P module for the LNA of an active antenna.

GNSS antenna input

The U.FL connector to attach an external GNSS antenna to the ZED-X20P GNSS Flex module.

Tip

For the best performance, we recommend users choose a compatible L1/L2/L5/L6/L-Band 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

The are three jumpers on top of the ZED-X20P GNSS Flex module that can be modified to change the source of the GNSS data for the IM19 attitude module.

Jumpers

The jumper on the top of the ZED-X20P GNSS Flex module.

Never modified a jumper before?

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