Telit Wireless Solutions SE878K -A Series Product User Manual
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Telit Wireless Solutions SE878K -A Series Product User Manual

Telit Wireless Solutions SE878K -A Series Product User Manual

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SE878Kx-Ax Family
Product User Guide
1VV0301402 Rev. 8 – 2021-07-21
Telit Technical Documentation

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Summary of Contents for Telit Wireless Solutions SE878K -A Series

  • Page 1 SE878Kx-Ax Family Product User Guide 1VV0301402 Rev. 8 – 2021-07-21 Telit Technical Documentation...

  • Page 2: Applicability Table

    SE878Kx-Ax Family Product User Guide APPLICABILITY TABLE PRODUCTS SE878K3-A SE878K7-A 1VV0301402 Rev. 8 Page 2 of 73 2021-07-21 Not Subject to NDA...

  • Page 3: Table Of Contents

    SE878Kx-Ax Family Product User Guide CONTENTS APPLICABILITY TABLE CONTENTS INTRODUCTION Scope Audience Contact Information, Support Symbol Conventions Related Documents Related Documents Requiring a Non-Disclosure Agreement 9 PRODUCT DESCRIPTION Product Overview SE878Kx-Ax Product Naming Product Variants 2.3.1. Multi-Constellation Modules Features (MT3333-based) 2.3.2.
  • Page 4 SE878Kx-Ax Family Product User Guide 4.6.3. Host EPO Elevation Mask Angle Static Navigation Jamming Rejection – Active Interference Cancellation (AIC)19 Internal LNA 10 Hz Navigation 1PPS Serial I/O Ports Power Management Modes 4.14.1. Full Power Continuous Mode 4.14.2. Backup Mode (Perpetual) (MT3333-based modules only) 4.14.3.
  • Page 5 SE878Kx-Ax Family Product User Guide 9.2.1. SE878K3-Ax Pinout Table 9.2.2. SE878K7-Ax Pinout Table DC Power Supply 9.3.1. 9.3.2. VBATT 9.3.3. DC Power Requirements 9.3.4. DC Power Consumption: SE878K3-Ax 9.3.5. DC Power Consumption: SE878K7-Ax Control and Status Signals 9.4.1. I/O Signal Levels 9.4.2.
  • Page 6 SE878Kx-Ax Family Product User Guide RF Interference Shielding REFERENCE DESIGN MECHANICAL DRAWING PCB FOOTPRINT PACKAGING AND HANDLING Product Marking and Serialization Product Packaging Moisture Sensitivity ESD Sensitivity Assembly Considerations Washing Considerations Reflow Safety Disposal ENVIRONMENTAL REQUIREMENTS Operating Environmental Limits Storage Environmental Limits COMPLIANCES CE Declarations of Conformity PRODUCT AND SAFETY INFORMATION...
  • Page 7 SE878Kx-Ax Family Product User Guide 17.2.6. Waiver of Liability Safety Recommendations GLOSSARY AND ACRONYMS DOCUMENT HISTORY 1VV0301402 Rev. 8 Page 7 of 73 2021-07-21 Not Subject to NDA...

  • Page 8: Introduction

    SE878Kx-Ax Family Product User Guide 1. INTRODUCTION Scope The purpose of this document is to provide information regarding the function, features, and usage of the Telit products listed in Applicability Table. For details of the members of the product family refer to chapter 2. Product Description. Audience This document is intended for Telit customers, especially system integrators, about to implement their applications using the Telit SE878Kx-Ax family.

  • Page 9: Symbol Conventions

    SE878Kx-Ax Family Product User Guide Symbol Conventions Danger: This information MUST be followed or catastrophic equipment failure or personal injury may occur. Warning: Alerts the user on important steps about the module integration. Note/Tip: Provides advice and suggestions that may be useful when integrating the module.

  • Page 10: Product Description

    SE878Kx-Ax Family Product User Guide 2. PRODUCT DESCRIPTION SE878Kx-Ax GNSS antenna module family provides complete multi-constellation position, velocity, and time (PVT) engines featuring high performance, high sensitivity, and low power consumption. All modules compute a navigation solution using GPS signals. Multi-constellation modules add GLONASS and Galileo signals to yield better coverage, greater accuracy, and improved availability.

  • Page 11: Se878Kx-Ax Product Naming

    SE878Kx-Ax Family Product User Guide o MT3333-based: The secondary serial port is I2C and is configurable for SPI or UART interface o MT3337-based: The secondary port is UART • MT3333-based: 8 Megabit built-in flash memory • MT3337-based: ROM memory • Less than 80 mW total power consumption (Full Power mode - typical) •...

  • Page 12: Product Variants

    SE878Kx-Ax Family Product User Guide Product Variants Module Chipset Constellations Memory Antenna Notes SE878K3-A MT3333 Multi Flash High SE878K7-A MT3337E GPS only High Table 2: Product Variants 2.3.1. Multi-Constellation Modules Features (MT3333-based) • MediaTek MT3333 engine • GPS, GLONASS BeiDou, Galileo, and QZSS satellite signals •...

  • Page 13: Block Diagrams

    SE878Kx-Ax Family Product User Guide • There is no RF switch or support for an external antenna. Block Diagrams Figure 2: SE878K3-Ax Block Diagram Figure 3: SE878K7-Ax Block Diagram 1VV0301402 Rev. 8 Page 13 of 73 2021-07-21 Not Subject to NDA...

  • Page 14: Module Photos

    SE878Kx-Ax Family Product User Guide Module Photos Figure 4: SE878Kx-Ax Top View Bottom Figure 5: SE878Kx-Ax 3D Views 1VV0301402 Rev. 8 Page 14 of 73 2021-07-21 Not Subject to NDA...

  • Page 15: Evaluation Board (Evb)

    SE878Kx-Ax Family Product User Guide 3. EVALUATION BOARD (EVB) The EVB contains the module mounted on a PC Board to facilitate development and testing. Please refer to the product Evaluation Board User Guide for detailed information. Figure 6: SE878Kx-Ax Evaluation Board 1VV0301402 Rev.

  • Page 16: Product Features

    SE878Kx-Ax Family Product User Guide 4. PRODUCT FEATURES Onboard (built-in) Antenna and RF switch (Built- in/External) The module includes an RF switch which allows the user to select the onboard antenna or an external antenna as the GNSS signal source. See section 2.5 Block Diagrams. Multi-Constellation Navigation (MT3333-based modules only) The GPS and GLONASS constellations are enabled by default.

  • Page 17: Sbas Corrections

    SE878Kx-Ax Family Product User Guide 4.4.1. SBAS Corrections The SBAS satellites transmit a set of differential corrections to their respective regions. The use of SBAS corrections can improve positioning accuracy. Differential GPS (DGPS) DGPS is a Ground-Based Augmentation System (GBAS) for reducing position errors by applying corrections from a set of accurately surveyed ground stations located over a wide area.

  • Page 18: Server-Generated Agps - Extended Prediction Orbit (Epo)

    SE878Kx-Ax Family Product User Guide 4.6.2. Server-Generated AGPS - Extended Prediction Orbit (EPO) (MT3333-based modules only) Server-generated ephemeris predictions are maintained on Telit AGPS servers. The predicted ephemeris file is obtained from the AGPS server and is transmitted to the module over a serial port.

  • Page 19: Jamming Rejection - Active Interference Cancellation (Aic)19

    SE878Kx-Ax Family Product User Guide The navigation solution is unfrozen when the speed increases above a threshold or when the computed position exceeds a set distance (10 m) from the frozen position (indicating that the receiver is again in motion). The speed threshold can be set via the PMTK386 command.

  • Page 20: 10 Hz Navigation

    SE878Kx-Ax Family Product User Guide 10 Hz Navigation The default rate of 1 Hz can be changed by command PMTK500 to a maximum of 10 Hz. MT3337-based receivers have a maximum of 5 Hz. Enabling the SBAS feature limits the maximum fix rate to 5 Hz. 1PPS 1PPS is a one pulse per second signal.

  • Page 21: Full Power Continuous Mode

    SE878Kx-Ax Family Product User Guide Power Management - Command Summary Periodic (MT3333 only) Specify Extended Parameters Backup Standby Always Locate (MT3333 only) Specify Extended Parameters Standby Backup GLP (MT3333 only) Disable Enable Table 3: Power Management Command Summary 4.14.1. Full Power Continuous Mode The receiver starts in full power continuous mode when powered up.

  • Page 22: Standby Modes

    SE878Kx-Ax Family Product User Guide 4.14.3. Standby Modes In these modes, the receiver stops navigation, the internal processor enters the standby state, and the current drain at main supply VCC_IN is substantially reduced. STOP: ARM baseband, RF, and TCXO are powered down SLEEP: ARM baseband and RF are powered down Standby mode is entered by sending the following NMEA command: $PMTK161,0*28...

  • Page 23: Periodic Modes (Mt3333-Based Modules Only)

    SE878Kx-Ax Family Product User Guide 4.14.5. Periodic Modes (MT3333-based modules only) These modes allow autonomous power on/off control with reduced fix rate to decrease average power consumption. The main power supply pin VCC_ON is still powered, but power distribution to internal circuits is controlled by the receiver firmware. •...

  • Page 24: Alwayslocate™ Mode (Mt3333-Based Modules Only)

    SE878Kx-Ax Family Product User Guide Where: SV = 1 to 4, default = 1 SNR = 25 to 30, default = 28 Ext. threshold = 40 000 to 180 000 ms, default = 180 000 Ext. gap = 0 to 3 600 000 ms, default = 180 000 This is the limit between successive DEE $PMTK225,<Type>,<Run_time>,<Sleep_time>,<2 _run_time>,<2...
  • Page 25 SE878Kx-Ax Family Product User Guide $PMTK225,<mode>*<checksum><CR><LF> Where, mode = 8 for AlwaysLocate (standby) mode or 9 for AlwaysLocate (backup) mode Example: $PMTK225,9*22 The acknowledgement response for the command is: $PMTK001,225,3*35 To exit AlwaysLocate mode, send the NMEA command: $PMTK225,0*2B just after the module wakes up from its previous sleep cycle. 1VV0301402 Rev.

  • Page 26: Data Retention

    SE878Kx-Ax Family Product User Guide 5. DATA RETENTION (MT3333-based modules only) The receiver is capable of retaining certain data elements under the various initialization types. If Vbatt is maintained, no data will be lost. The following table shows which data elements are saved under each type of initialization if both Vcc and Vbatt are removed.

  • Page 27: Product Performance

    SE878Kx-Ax Family Product User Guide 6. PRODUCT PERFORMANCE Horizontal Position Accuracy Constellation CEP (m) GPS + Glonass Test Conditions: 24-hr Static, Live signals, Full Power mode Note: MT3337-based modules support GPS only Table 5: SE878Kx-Ax Horizontal Position Accuracy Time to First Fix Constellations(s) Start Type Max TTFF (s)

  • Page 28: Jamming Mitigation Performance Example

    SE878Kx-Ax Family Product User Guide Jamming Mitigation Performance Example Figure 12: Jamming with AIC Disabled Figure 13: Jamming with AIC Enabled 1VV0301402 Rev. 8 Page 28 of 73 2021-07-21 Not Subject to NDA...

  • Page 29: Message Interface

    SE878Kx-Ax Family Product User Guide 7. MESSAGE INTERFACE Data streams supported by the serial ports: • NMEA messages (output) and commands (input) • DGPS (RTCM SC-104) Version 2.3 protocol message types 1, 2, 3, and 9 (input) • Server-based AGPS (Extended Prediction Orbit) I/O For more information regarding the software interface, refer Telit MT Software User Guide.

  • Page 30: Proprietary Output Messages

    SE878Kx-Ax Family Product User Guide The following table shows the Talker IDs used: Talker ID Constellation BeiDou Galileo GLONASS QZSS Table 10: NMEA Talker IDs 7.1.2. Proprietary Output Messages The receivers support several proprietary NMEA output messages which contain additional receiver data and status information. Message ID Description $PMTK010...
  • Page 31 SE878Kx-Ax Family Product User Guide Command ID Description $PMTK101 Perform a HOT start $PMTK102 Perform a WARM start $PMTK103 Perform a COLD start. However, Time is preserved. $PMTK104 Perform a FULL COLD start, erasing time and any stored almanac data $PMTK120 Erase aiding data stored in flash memory $PMTK127...

  • Page 32: Flash Upgradability

    SE878Kx-Ax Family Product User Guide 8. FLASH UPGRADABILITY (MT3333-based modules only) Note: The MT3337-based modules use ROM memory and therefore are not upgradable. Please refer to the product EVK User Guide for more detailed information. The firmware stored in the internal Flash memory may be upgraded via the port 0 TX/RX pins.

  • Page 33: Electrical Interface

    SE878Kx-Ax Family Product User Guide 9. ELECTRICAL INTERFACE SE878Kx-Ax Family Pinout Diagram Figure 14: SE878Kx-Ax Family Pinout Diagram Note: These pins are not available on the SE878K7-Ax. • FORCE_ON is available only on the SE878K3-Ax. It is not connected on the SE878K7-Ax. •...

  • Page 34: Se878Kx-Ax Module Pinout Tables

    SE878Kx-Ax Family Product User Guide SE878Kx-Ax Module Pinout Tables 9.2.1. SE878K3-Ax Pinout Table Name Type Description Note Power and Ground Main power supply VBATT Backup Power supply 7, 14, 18, 22, 24, Ground Ground (all pins must be grounded) RF and Antenna EXT_ANT_RF_IN External Antenna RF Input ANT_SEL...

  • Page 35: Se878K7-Ax Pinout Table

    SE878Kx-Ax Family Product User Guide Name Type Description Note nANT_SHORTED and ANT_OPEN are not connected on the SE878K7-Ax FORCE_ON is available only on the SE878K3-Ax. It is not connected on the SE878K7-Ax I2C and SPI are available only on the SE878K3-Ax. The SE878K7-Ax second port is UART. The SE878K3-Ax second port is switched between I2C (default) and UART or SPI via command The External Antenna RF Input is considered to be ESD sensitive.

  • Page 36: Dc Power Supply

    SE878Kx-Ax Family Product User Guide DC Power Supply The modules have two power supply pins V and V BATT Note: I/O voltage ranges are different from supply voltages Vcc and Vbatt. 9.3.1. This is the main power input. The supply voltage must be in the range specified in Table 15: DC Supply Voltage Note: Vcc does not supply the RTC domain, therefore Vbatt must be supplied any time that Vcc is powered.

  • Page 37: Dc Power Requirements

    SE878Kx-Ax Family Product User Guide • Persistent data elements (not commanded option values) This allows the module to retain time and ephemeris information, thus enabling hot and warm starts, which will improve (decrease) TTFF. 9.3.3. DC Power Requirements Main Supply Voltage & Backup Voltage Supply Name Units...

  • Page 38: Dc Power Consumption: Se878K7-Ax

    SE878Kx-Ax Family Product User Guide 9.3.5. DC Power Consumption: SE878K7-Ax State (GPS only) Units Acquisition Navigation/Tracking Vbatt μW Operating temperature: 25°C Supply voltages: 3.3 VDC nominal Low Power mode: 500 ms duty cycle SBAS: not supported 1PPS sync: disabled Table 17: SE878K7-Ax Power Consumption Control and Status Signals 9.4.1.

  • Page 39: Logic Levels - Outputs

    SE878Kx-Ax Family Product User Guide 9.4.3. Logic Levels – Outputs TX0, TX1, DRI and 1PPS Signal Symbol Units Output Voltage (L) Output Voltage (H) 2.14 2.89 Normal Current (L) Output Current (H) Table 19: Output Logic Levels 9.4.4. Control and Input Signals 9.4.4.1.

  • Page 40: Ant_Sel

    SE878Kx-Ax Family Product User Guide 9.4.4.3. ANT_SEL The Antenna Select pin selects the antenna to provide the RF signal to the module. If HIGH, the onboard antenna will be used. If LOW, the external antenna will be used. The SE878K3-Ax can report the status of the antenna switch. For logic levels, see Table 18: Input Logic Levels and Table 19: Output Logic Levels 9.4.4.4.

  • Page 41: I/O Ports

    SE878Kx-Ax Family Product User Guide NMEA output (timestamp) can be configured to have a fixed latency behind the 1PPS pulse of 460 to 485 ms via the $PMTK255 command. Default is variable latency. Figure 15: 1PPS NMEA Synchronization These configurations will not be preserved across a power cycle or reset. 1PPS is disabled if the fix rate >...

  • Page 42: Secondary (Port 1) Usage

    SE878Kx-Ax Family Product User Guide RX0: NMEA proprietary commands, RTCM SC-104 input and EPO data TX0 / RX0 is also used to re-flash the module (MT3333-based modules only). 9.5.1.2. Secondary (Port 1) Usage TX1: NMEA message output RX1: DGPS input using the RTCM SC-104 protocol and NMEA commands. I2C and SPI support the same data streams as UART.

  • Page 43: I2C Port Operation (Mt3333-Based Modules Only)

    SE878Kx-Ax Family Product User Guide Two methods are supported for the host to receive NMEA messages: Polling mode and Interrupt mode. During a SPI transmission, data is transmitted (shifted out serially) and received (shifted in serially) simultaneously by the module. If no data is ready to be transmitted, the host (master) still needs to send padding bytes.
  • Page 44 SE878Kx-Ax Family Product User Guide Receive The maximum length for commands sent to the module.is 255 bytes. A minimum of 10 ms is required between packets. Note: The following features are fully supported via I2C: • GLP mode (Enable/Disable) • Low Power modes supported by the module (Set and Wakeup) •...

  • Page 45: Rf Front-End Design

    SE878Kx-Ax Family Product User Guide 10. RF FRONT-END DESIGN RF Signal Requirements The receiver can achieve Cold Start acquisition with a signal level above the specified minimum at its input. This means that it can acquire and track visible satellites, download the necessary navigation data (for example, time and ephemeris) and compute its position within a period of 5 minutes.

  • Page 46: External Gnss Antenna

    SE878Kx-Ax Family Product User Guide • Extraneous path loss (for example, rain) • Partial or total path blockage (such as foliage or buildings) • Multipath interference (caused by signal reflection) • GNSS antenna characteristics • Signal path after the GNSS antenna The satellite transmit power is specified in each constellation’s reference documentation, which is readily available online.

  • Page 47: Onboard Gnss Antenna (Included In The Module)

    SE878Kx-Ax Family Product User Guide Warning: The EXT_ANT_RF_IN pin is ESD sensitive. The external antenna is selected by the ANT_SEL antenna select pin. This should be an active antenna (with its own SAW filter and LNA). Power should be supplied via an external Bias-T. Onboard GNSS Antenna (included in the module) Note that these modules include an RF input switch which allows an external antenna to be connected and provide the GNSS signal instead of the onboard antenna.

  • Page 48: System Noise Floor

    SE878Kx-Ax Family Product User Guide Figure 16: SE878Kx-Ax Ground Plane System Noise Floor The receiver will display a reported C/No of 40 dB-Hz for an input signal level of -130 dBm. The C/No number means the carrier (or signal) is 40 dB greater than the noise floor measured in a one Hz bandwidth.

  • Page 49: Rf Interference

    SE878Kx-Ax Family Product User Guide We can estimate a typical system noise figure of 4 dB for the module, consisting of the pre-select SAW filter loss, the LNA noise figure, and implementation losses within the digital signal processing unit. The DSP noise is typically 1.0 to 1.5 dB. However, if a good quality external LNA is used, the noise figure of that LNA (typically better than 1dB) could reduce the overall system noise figure from 4 dB to approximately 2 dB.

  • Page 50: Reference Design

    SE878Kx-Ax Family Product User Guide 11. REFERENCE DESIGN DRI/ Figure 17: SE878Kx-Ax Reference Design Along with power and grounds, the minimum signals required to operate the receiver properly are the RF input signal and two digital I/O signals (TX and RX). TX and RX are UART lines with a default of 9600-8-N-1.

  • Page 51: Mechanical Drawing

    SE878Kx-Ax Family Product User Guide 12. MECHANICAL DRAWING Figure 18: SE878Kx-A Mechanical Drawing 1VV0301402 Rev. 8 Page 51 of 73 2021-07-21 Not Subject to NDA...

  • Page 52: Pcb Footprint

    SE878Kx-Ax Family Product User Guide 13. PCB FOOTPRINT Figure 19: SE878Kx-Ax PCB Footprint 1VV0301402 Rev. 8 Page 52 of 73 2021-07-21 Not Subject to NDA...

  • Page 53: Packaging And Handling

    SE878Kx-Ax Family Product User Guide 14. PACKAGING AND HANDLING Product Marking and Serialization The SE878Kx-Ax module label has a 2D Barcode identifying the module and its serial number. Contact a Telit representative for information on specific module serial numbers. Figure 20: Product Label Description Telit logo Product Name...

  • Page 54: Product Packaging

    SE878Kx-Ax Family Product User Guide Product Packaging SE878Kx-Ax modules are shipped in Tape and Reel form. The reeled modules are shipped in 24mm mini reels with 300 units per reel. Each reel is ‘dry’ packaged and vacuum sealed in a Moisture Barrier Bag (MBB) with two silica gel packs and placed in a carton. The minimum order quantity for shipping is 300 units.

  • Page 55: Moisture Sensitivity

    SE878Kx-Ax Family Product User Guide Moisture Sensitivity Precautionary measures are required in handling, storing and using these electronic devices to avoid damage from moisture absorption. If localized heating is required to rework or repair the device, precautionary methods are required to avoid exposure to solder reflow temperatures that can result in performance degradation or damage.
  • Page 56 SE878Kx-Ax Family Product User Guide Figure 22: Moisture Sensitive Device Label 1VV0301402 Rev. 8 Page 56 of 73 2021-07-21 Not Subject to NDA...

  • Page 57: Esd Sensitivity

    SE878Kx-Ax Family Product User Guide ESD Sensitivity Note: The module contains class 1 devices and is Electro-Static Discharge Sensitive (ESDS). Telit recommends the two basic principles of protecting ESD devices from damage: • Handle sensitive components only in an ESD Protected Area (EPA) under protected and controlled conditions;...

  • Page 58: Reflow

    SE878Kx-Ax Family Product User Guide Reflow The modules are compatible with lead free soldering processes as defined in IPC/JEDEC J-STD-020. The reflow profile must not exceed the profile given IPC/JEDEC J-STD-020 Table 5-2, “Classification Reflow Profiles”. Note: Although, IPC/JEDEC J-STD-020 allows for three reflows, the assembly process for the module uses one of those profiles, therefore the module is limited to two reflows.

  • Page 59: Safety

    SE878Kx-Ax Family Product User Guide Note: Please note that the JEDEC document includes important information in addition to the above figure. Please refer to: https://www.jedec.org/sites/default/files/docs/jstd020d-01 .pdf Safety Danger: Improper handling and use of this module can cause permanent damage to the receiver. There is also the possible risk of personal injury from mechanical trauma or choking hazard.

  • Page 60: Environmental Requirements

    SE878Kx-Ax Family Product User Guide 15. ENVIRONMENTAL REQUIREMENTS Operating Environmental Limits Operating Limits Temperature -40°C to +85°C Temperature ±1°C / minute maximum Rate of Change Up to 95% non-condensing or a wet bulb temperature of +35°C, whichever is Humidity less 600 m/sec (acquisition and navigation) Maximum Vehicle Dynamics 2G acceleration...

  • Page 61: Compliances

    SE878Kx-Ax Family Product User Guide 16. COMPLIANCES The SE878Kx-Ax modules comply with the following: • Directive 2011/65/EU art. 16 on the restriction of the use of certain hazardous substances in electrical and electronic equipment (RoHS) • Manufactured in an ISO 9001: 2008 accredited facility •...

  • Page 62: Ce Declarations Of Conformity

    SE878Kx-Ax Family Product User Guide CE Declarations of Conformity Figure 24: SE878K3-A CE Declaration of Conformity 1VV0301402 Rev. 8 Page 62 of 73 2021-07-21 Not Subject to NDA...
  • Page 63 SE878Kx-Ax Family Product User Guide Figure 25: SE878K7-A CE Declaration of Conformity 1VV0301402 Rev. 8 Page 63 of 73 2021-07-21 Not Subject to NDA...

  • Page 64: Product And Safety Information

    SE878Kx-Ax Family Product User Guide 17. PRODUCT AND SAFETY INFORMATION Copyrights and Other Notices SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE Although reasonable efforts have been made to ensure the accuracy of this document, Telit assumes no liability resulting from any inaccuracies or omissions in this document, or from the use of the information contained herein.

  • Page 65: Usage And Disclosure Restrictions

    SE878Kx-Ax Family Product User Guide computer programs, including – but not limited to - the exclusive right to copy or reproduce in any form the copyrighted products. Accordingly, any copyrighted computer programs contained in Telit’s products described in this instruction manual shall not be copied (reverse engineered) or reproduced in any manner without the express written permission of the copyright owner, being Telit or the Third Party software supplier.

  • Page 66: Trademarks

    SE878Kx-Ax Family Product User Guide 17.2.4. Trademarks TELIT and the Stylized T-Logo are registered in the Trademark Office. All other product or service names are property of their respective owners. 17.2.5. Third Party Rights The software may include Third Party’s software Rights. In this case the user agrees to comply with all terms and conditions imposed in respect of such separate software rights.
  • Page 67 SE878Kx-Ax Family Product User Guide Safety Recommendations Make sure the use of this product is allowed in your country and in the environment required. The use of this product may be dangerous and has to be avoided in areas where: •...
  • Page 68 SE878Kx-Ax Family Product User Guide 18. GLOSSARY AND ACRONYMS Assisted (or Aided) GPS AGPS provides ephemeris data to the receiver to allow faster cold start times than would be possible using only broadcast data. This AGPS extended ephemeris data could be either server-generated or locally generated.
  • Page 69 SE878Kx-Ax Family Product User Guide Geometric Dilution of Precision A factor used to describe the effect of satellite geometry on the accuracy of the time and position solution of a GNSS receiver. A GDOP lower value of GDOP indicates a smaller error in the solution. Related factors include PDOP (position), HDOP (horizontal), VDOP (vertical) and TDOP (time).
  • Page 70 SE878Kx-Ax Family Product User Guide receiver, while in normal operation, losing the RF signal (perhaps due to the antenna cable being disconnected or a vehicle entering Reacquisition a tunnel), and re-establishing a valid fix after the signal is restored. Contrast with Reset and Restart. A receiver beginning operation after being sent a restart command, generally used for testing rather than normal Restart...
  • Page 71 SE878Kx-Ax Family Product User Guide Universal Asynchronous Receiver/Transmitter UART An integrated circuit (or part thereof) which provides a serial communication port for a computer or peripheral device. Wide Area Augmentation System WAAS The North American SBAS system developed by the US Federal Aviation Administration (FAA).
  • Page 72 SE878Kx-Ax Family Product User Guide 19. DOCUMENT HISTORY Revision Date Changes Corrected Figure numbers 2021-07-21 Minor editorial changes Modified section 9.5.4 to document features supported via I2C port. 2021-07-15 Updated document to new Telit standard template Removed the following sections: •...

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