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YUGE CLM920 NC3 Hardware Manual

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Product Name
CLM920_NC3 Module hardware manual
Number of Pages
77
Produce Version
V2.0
Date
2018/1/26
CLM920_NC3
module hardware manual
V2.0
Shanghai Yuge Information Technology co., LTD
All rights reserved

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Summary of Contents for YUGE CLM920 NC3

  • Page 1 Product Name CLM920_NC3 Module hardware manual Number of Pages Produce Version V2.0 Date 2018/1/26 CLM920_NC3 module hardware manual V2.0 Shanghai Yuge Information Technology co., LTD All rights reserved...
  • Page 2 CLM920_NC3 module hardware usage guide Update records version Date Author Description V2.0 20180126 David First draft Page 2 of 77 Shang Hai YUGE Information Technology co., LTD...

  • Page 3: Table Of Contents

    3.7.1 USIM Card Reference Circuit................38 3.7.2 UIM_DET Hot Swap Reference Design............38 3.8 General GPIO Interface....................39 3.9 Network Status Indicator Interface................40 3.10 Module Status Indicator.................... 41 3.11 PCM digital voice interface..................42 Page 3 of 77 Shang Hai YUGE Information Technology co., LTD...
  • Page 4 Chapter 6 Structural and Mechanical Properties...............67 6.1 Overview of this chapter..................... 67 6.2 Appearance........................67 Chapter 7 Packaging and Production..................70 7.1 Overview of this chapter..................... 70 7.2 Module Packaging and Storage...................70 Page 4 of 77 Shang Hai YUGE Information Technology co., LTD...
  • Page 5 8.3 Encoding method......................73 8.4 Safety and Precautions....................76 Chart Contents Figure 2-1 Functional block diagram of the CLM920 NC3 LCC module........15 Figure 3-1 LCC module interface definition................17 Figure 3-2 GSM TDMA network burst current supply voltage drop........27 Figure 3-3 VBAT power supply....................27 Figure 3-4 LDO linear power supply reference circuit.............27...
  • Page 6 Figure 3-33 Antenna connector matching plug diagram............55 Figure 3-34 Matching coaxial RF line size................55 Figure 6-1 Appearance of the CLM920 NC3................67 Figure 6-2 Front view and side view of the module (unit: mm)..........67 Figure 6-3 Bottom view of the module (unit: mm)..............68 Figure 6-4 Recommended module package (unit: mm)............69...
  • Page 7 Table 4-15 EVDO data transmission power consumption (GNSS off)........62 Table 4-16 LTE data transmission power consumption (GNSS off).........62 Table 5-1 CLM920 NC3 module working storage temperature..........64 Table 5-2 Electrical Characteristics of CLM920 NC3 Module..........64 Table 5-3 CLM920 NC3 Module Operating Voltage..............64 Table 5-4 CLM920 NC3 ESD Features..................
  • Page 8 Table 8-4 Maximum EDGE Rate....................74 Table 8-5 Maximum HSDPA rate..................... 74 Table 8-6 Maximum HSUPA rate..................... 75 Table 8-7 LTE-FDD DL maximum rate..................75 Table 8-8 LTE-FDD UL Maximum Rate.................. 76 Page 8 of 77 Shang Hai YUGE Information Technology co., LTD...

  • Page 9: Chapter 1 Introduction

    CLM920_NC3 module hardware usage guide Chapter 1 Introduction This document is a wireless solution product CLM920 NC3, CLM920 TB3, CLM920 TE3 module hardware interface manual, designed to describe the hardware components and functional characteristics of the module solution, application interface definition and application instructions, electrical performance and mechanical characteristics.

  • Page 10: Chapter 2 Module Overview

    CLM920_NC3 module hardware usage guide Chapter 2 Module Overview 2.1 Module Introduction CLM920 NC3 module is an LCC package module, which is an integrated FDD-LTE/TDD-LTE/TD-SCDMA/WCDMA/EVDO/CDMA/EDGE/GSM and other wireless terminal products for network standards and GPS location services. The module is based on...
  • Page 11 1.2GHZ, 256kB level 2 cache Operating Voltage 3.3V - 4.2V Typical Voltage 3.7V Energy saving current Standby current < 5mA Applicatio  Standard SIM Support 3.0V/1.8V, support hot swap function Page 11 of 77 Shang Hai YUGE Information Technology co., LTD...
  • Page 12 Used to indicate the status of the module, the speed of indication the light is on to indicate different module status  General GPIO WAKEUP_IN sleep mode control, low wake-up Page 12 of 77 Shang Hai YUGE Information Technology co., LTD...
  • Page 13 LTE FDD:DL 10Mbps/UL 5Mbps@20M BW cat1 LTE TDD:DL 10Mbps/UL 5Mbps@20M BW cat1 GPS/BEIDOU/GLONASS Satellite positioning Protocol：NMEA Diversity antenna Support LTE diversity antenna AT command Support for standard AT instruction sets (Hayes 3GPP Page 13 of 77 Shang Hai YUGE Information Technology co., LTD...

  • Page 14: Module Function

     Memory unit  RF transceiver unit  RF front-end unit  GPS RF receiving unit The functional block diagram of the CLM920 NC3 LCC module is as follows: Page 14 of 77 Shang Hai YUGE Information Technology co., LTD...
  • Page 15 CLM920_NC3 module hardware usage guide Figure 2-1 Functional block diagram of the CLM920 NC3 LCC module Page 15 of 77 Shang Hai YUGE Information Technology co., LTD...

  • Page 16: Chapter 3 Interface Application Description

     USIM interface  UART interface  Control interface  PCM/I2S voice interface  RF antenna interface  GPIO interface  Reserved  NC interface  SPI interface  SDIO interface Page 16 of 77 Shang Hai YUGE Information Technology co., LTD...

  • Page 17: Module Interface

    3.2.1 144-pin LCC interface Figure 3-1 LCC module interface definition 3.2.2 Interface Definition The CLM920_NC3 module is an LCC interface module. The module interface is defined as shown in the following table: Page 17 of 77 Shang Hai YUGE Information Technology co., LTD...
  • Page 18 RESET_N PWRKEY RESERVED PCM_IN PCM_OUT PCM_SYNC PCM_CLK SDC2_DATA3 SDC2_DATA2 SDC2_DATA1 SDC2_DATA0 SDC2_CLK SDC2_CMD VDD_SDIO ANT_DIV SPI_CS_N（I2S_D1） SPI_MOSI（I2S_WS） SPI_MISO（I2S_D0） SPI_CLK（I2S_SCLK） I2C_SCL I2C_SDA RESERVED ADC1 ADC0 ANT_GNSS ANT_MAIN RESERVED VBAT VBAT Page 18 of 77 Shang Hai YUGE Information Technology co., LTD...
  • Page 19 CLM920_NC3 module hardware usage guide VBAT VBAT STATUS USB_DP USB_DM USB_VBUS RESERVED RESERVED RESERVED RESERVED RESERVED RESERVED RESERVED RESERVED RESERVED RESERVED RESERVED RESERVED RESERVE RESERVE RESERVE MCLK RESERVE RESERVE RESERVE RESERVE RESERVE RESERVE Page 19 of 77 Shang Hai YUGE Information Technology co., LTD...
  • Page 20 Module power input Power supply needs to guarantee 2A current VBAT Module power input VBAT Module power input VBAT Module power input VDD_EXT 1.8V output Can provide pull-up for external GPIO Page 20 of 77 Shang Hai YUGE Information Technology co., LTD...
  • Page 21 Clear send Keep it floating when not in use Request to send Keep it floating when not in use Module sleep mode Keep it floating when not in use Page 21 of 77 Shang Hai YUGE Information Technology co., LTD...
  • Page 22 RESERVE, please keep it GPIO_1 not been defined floating Keep it floating when not in W_DISABLE# Flight mode control This pin function has RESERVE, please keep it GPIO_2 not been defined floating Page 22 of 77 Shang Hai YUGE Information Technology co., LTD...
  • Page 23 Keep it floating when not in use SDIO interface Module pin Functional Remarks number definition description SD_CARD_DET DI SD card insertion Keep it floating when not in use detection Page 23 of 77 Shang Hai YUGE Information Technology co., LTD...
  • Page 24 MCLK 12.288M clock output Keep it floating when not in use ADC interface Module pin Functional description Remarks number definition ADC1 General analog to digital Keep it floating Page 24 of 77 Shang Hai YUGE Information Technology co., LTD...

  • Page 25: Power Interface

     The module defines RESERVED and NC pins that are suspended and not available. 3.3 Power Interface The CLM920 NC3 module power interface consists of three parts:  VBAT is the module working power supply  UIM_PWR is the working power supply for SIM card ...

  • Page 26: Power Supply Design

    ,53,54,56,72, 85~112 The CLM920 NC3 module is available in a single-supply mode with four power supply pins. The VBAT power supply range is 3.3 to 4.2V. It is recommended to use 3.7V/2A power supply. When transmitting data or talking under HSPA/UTMS/GSM network, the instantaneous high-power transmission will produce a peak current of more than 2A peak, which will cause a large ripple on the power supply.

  • Page 27: Power Reference Circuit

    LDO power supply to design the VBAT power supply. Both design circuits need to supply enough current. Refer specifically to the following circuit design: Figure 3-4 LDO linear power supply reference circuit Page 27 of 77 Shang Hai YUGE Information Technology co., LTD...
  • Page 28 GSM call will generate more than 2A current, the ripple voltage drop will occur on the power supply voltage, so the actual supply voltage should not be lower than 3.3V. Page 28 of 77 Shang Hai YUGE Information Technology co., LTD...

  • Page 29: Vdd_Sdio 1.8V/2.85V Voltage Output

    3.4 Switching machine reset mode 3.4.1 Booting The 21 pin of the CLM920 NC3 module is the boot pin. The module is powered on at low level. The PWRKEY is pulled low for at least 500ms. When the module is powered on, the user can check whether the module is powered on by querying the high and low levels of the VDD_EXT pin.

  • Page 30: Boot Timing

    500ms, and the module is powered on. The switch can also be designed with a push button. The button accessory requires a TVS tube for ESD protection. Page 30 of 77 Shang Hai YUGE Information Technology co., LTD...

  • Page 31: Shutdown

    Figure 3-8 Power-on reference circuit 3.4.3 Shutdown If the CLM920 NC3 module is to be shut down, the shutdown can be controlled by the PWRKEY pin. At this time, the module performs a normal shutdown process. The module can also be shut down by the AT command, and the shutdown command is AT$QCPWRDN.

  • Page 32: Usb Interface

    The reset RESET timing is as follows: Figure 3-10 Reset timing diagram The CLM920 NC3 module supports AT command reset, and the AT command is at+cfun=1,1 to restart the module. Detailed instructions can be found in the AT command set manual.
  • Page 33 USB bus power, the module can only be used as a slave device of the USB bus device. The USB interface supports the following features:  Software download upgrade  Data communication  AT Command  GNSS NMEA output, etc. Page 33 of 77 Shang Hai YUGE Information Technology co., LTD...

  • Page 34: Uart Interface

    CLM920_NC3 module hardware usage guide 3.6 UART interface 3.6.1 Main serial port The CLM920 NC3 module provides two sets of UART interfaces. The main serial port and the debug serial port have a serial port level of 1.8V. Main serial port: The serial port can realize AT interactive instructions, print program log information, and interact with peripheral data.
  • Page 35 MCU of 3.3V level, it is necessary to add a level conversion chip externally to achieve level matching. For the chip connection method, refer to the following circuit: Figure 3-14 Level conversion chip circuit Page 35 of 77 Shang Hai YUGE Information Technology co., LTD...

  • Page 36: Debugging The Serial Port

    Figure 3-15 RI pin signal waveform DTR: The DTR pin can be used as the sleep wake-up pin of the CLM920 NC3 module. When the module enters sleep, the DTR pin can be pulled low to wake up the module.

  • Page 37: Usim Interface

    CLM920_NC3 module hardware usage guide 3.7 USIM Interface The CLM920 NC3 module provides a USIM card interface compatible with the ISO 7816-3 standard. The USIM card power supply is provided by the module's internal power manager and supports 1.8V/3.0V. Table 3-11 SIM card signal definition...

  • Page 38: Usim Card Reference Circuit

    CLM920_NC3 module hardware usage guide 3.7.1 USIM Card Reference Circuit The CLM920 NC3 module does not come with a USIM card slot. Users need to design a USIM card slot on their own interface board. The USIM card interface reference circuit is as follows: Figure 3-16 USIM design circuit diagram ...

  • Page 39: General Gpio Interface

    SIM card is in the state, the status is low. Set AT+HOSCFG=0, 0 SIM card hot swap function is off. 3.8 General GPIO Interface The CLM920 NC3 module contains five general control signals. The interface is defined as follows: Table 3-13 General GPIO Pin Definitions Page 39 of 77 Shang Hai YUGE Information Technology co., LTD...

  • Page 40: Network Status Indicator Interface

    RF function. It can also be set to flight mode by AT+CFUN. For details, please refer to the 9x07 AT command set. 3.9 Network Status Indicator Interface The CLM920 NC3 module provides an open-drain GPIO signal to indicate the status of the RF communication. Page 40 of 77...

  • Page 41: Module Status Indicator

    R, which can be adjusted to a maximum of 40 mA. 3.10 Module Status Indicator The CLM920 NC3 module provides a pin as a working status indicator for the module. This pin can be used to connect to a GPIO or LED with pull-up for the module's power-on status indication.

  • Page 42: Pcm Digital Voice Interface

    Figure 3-19 STATUS Pin Reference Circuit 3.11 PCM digital voice interface The CLM920 NC3 module provides a set of PCM audio interfaces supporting 8-bit A-rate, μ-rate and 16-bit linear short frame encoding formats with PCM_SYNC of 8kHZ and PCM_CLK of 2048kHZ.

  • Page 43: I2C Bus

    Figure 3-21 PCM to analog voice map 3.12 I2C bus The CLM920 NC3 module provides a set of hardware bidirectional serial buses with an I2C interface of 1.8V level, a 5.0 protocol interface, and a clock rate of 400KHz. Page 43 of 77...

  • Page 44: Sdio Interface

    The I2C reference circuit is connected as follows: Figure 3-22 I2C interface reference circuit diagram 3.13 SDIO interface CLM920 NC3 module provides a 4-bit SD/MMC interface, supports 1.8V/2.95V two voltage SD cards, clock frequency up to 50MHz, maximum capacity support 32GB, support SD3.0 protocol.
  • Page 45 2.95V voltage VDD_Px domain 1.35 1.8V voltage domain SDC2_ 0.45 1.8V voltage domain SDIO 1.27 1.8V voltage domain -0.3 1.8V voltage domain DATA1 0.75* 2.95 VDD_Px 2.95V voltage VDD_Px domain Page 45 of 77 Shang Hai YUGE Information Technology co., LTD...
  • Page 46 1.8V voltage domain 0.45 1.8V voltage domain SDIO 1.27 1.8V voltage domain -0.3 2.95V voltage comman SDC2_ domain 0.75* 2.95 VDD_Px 2.95V voltage VDD_Px domain 0.125* 2.95V voltage VDD_Px domain Page 46 of 77 Shang Hai YUGE Information Technology co., LTD...
  • Page 47 The SD card reference design for the CLM920 NC3 module is shown below: Figure 3-23 SD card interface reference circuit diagram SD card circuit routing considerations:  The SD card power supply is 3V with a voltage range of 2.7~3.6V, which needs to be externally supplied and has a minimum current of 800mA.

  • Page 48: Spi Interface / Multiplexed I2S Interface

    Multiplexin g I2S_CLK 0.45 The SPI interface of the CLM920 NC3 module can also be used as I2S. It can be connected to the CODEC. The existing I2S supports the Nuvoton NAU8810 by default. Table 3-21 I2S pin definition Level value (V)
  • Page 49 I2S serial data -0.3 1.35 0.45 I2S_C I2S clock -0.3 The following figure shows the reference design of the CLM920 NC3 connection NAU8810. Figure 3-24 I2S to analog voice map Page 49 of 77 Shang Hai YUGE Information Technology co., LTD...

  • Page 50: Mclk Interface

    CLM920_NC3 module hardware usage guide 3.15 MCLK Interface The CLM920 NC3 module provides one MCLK and provides a 12.288M clock output. This interface is mainly used to connect the MCLK of the CODEC chip. The primary clock frequency of the NAU8810 is supported by default.

  • Page 51: Main Set Antenna Interface

    Figure 3-25 Main antenna matching circuit 3.17.2 Diversity Antenna Interface The 35-pin of the CLM920 NC3 is a diversity antenna interface. To facilitate the debugging of the antenna, a π-type matching circuit needs to be added to the main board, and a 50-ohm impedance line is required.

  • Page 52: Gnss Interface

    GLONASS, GALILEO signal reception. If you need to use it, you need to open the GPS with AT command AT+CGPS=1 (please consult CLM920 NC3 AT command set manual for details) In order to facilitate the debugging of the antenna, it is necessary to add a π-type matching circuit to the main board, and take a 50-ohm impedance line.

  • Page 53: Rf Trace Reference

    CLM920_NC3 module hardware usage guide  The CLM920 NC3 module provides three RF antenna interfaces, which are the main set antenna, the diversity antenna and the GPS antenna connection port. The antenna interface must be a 50 ohm characteristic impedance trace.

  • Page 54: Rf Connector Size

     If the RF connector is used, the antenna connector must use a coaxial connector with a 50 ohm characteristic impedance.  Hirose's UF.L-R-SMT connector is recommended. Figure 3-32 RF connector size chart Page 54 of 77 Shang Hai YUGE Information Technology co., LTD...
  • Page 55 Table 3-25 Main parameters of the RF connector Rated condition Environmental conditions Frequency Range DC to 6GHZ –40°C to +85°C Characteristic impedance 50 Ω –40°C to +85°C Figure 3-34 Matching coaxial RF line size Page 55 of 77 Shang Hai YUGE Information Technology co., LTD...

  • Page 56: Chapter 4 Overall Technical Indicators

    CLM920_NC3 module hardware usage guide Chapter 4 Overall Technical Indicators 4.1 Overview of this chapter The CLM920 NC3 Module RF General Specifications contain the following sections:  Working frequency  Conducted radio frequency measurement  Conducted receiving sensitivity and transmit power ...

  • Page 57: Working Frequency

    Agilent 66319 MXHP32HP1000 4.4.2 Test Standards The CLM920 NC3 module passes the 3GPP TS 51.010-1, 3GPP TS 34.121-1, 3GPP TS 36.521-1, 3GPP2 C.S0011 and 3GPP2 C.S0033 test standards. Each module is rigorously tested at the factory to ensure reliable quality.

  • Page 58: Conducted Receive Sensitivity And Transmit Power

    CLM920_NC3 module hardware usage guide 4.5 Conducted Receive Sensitivity and Transmit Power The CLM920 NC3 module 2G and 3G receive sensitivity and transmit power test indicators are as follows: Table 4-4 2G3G RF indicators Upstream Down Power Receiving Mode sensitivity GSM 850 824MHz–849MHz...

  • Page 59: Antenna Requirements

    LTE B40 21 to 25 LTE B41 21 to 25 4.6 Antenna requirements CLM920 NC3 module main set antenna and GNSS antenna design requirements: Table 4-7 Main set antenna indicator requirements Frequency band Standing wave ratio Antenna gain Effectiveness GSM850 <2.5:1...

  • Page 60: Power Consumption Characteristics

    CUCC WCDMA GPS off, no USB connection Idle mode 17.9 Sleep mode GPS off, no USB connection Idle mode 17.9 CTCC CDMA GPS off, no USB connection Sleep mode Page 60 of 77 Shang Hai YUGE Information Technology co., LTD...
  • Page 61 Table 4-12 EDGE Data Transmission Power Consumption (GNSS Off) Frequency band Condition Power level Current consumption mA EGSM900 1 received 4 rounds DCS1800 1 received 4 rounds EGSM900 1 received 4 rounds DCS1800 1 received 4 rounds Page 61 of 77 Shang Hai YUGE Information Technology co., LTD...
  • Page 62 Current consumption mA @5Mbps LTE-FDD B1 @10Mbps @20Mbps @5Mbps LTE-FDD B3 @10Mbps @20Mbps @5Mbps LTE-FDD B5 @10Mbps @5Mbps LTE-FDD B7 @10Mbps @20Mbps @5Mbps LTE-FDD B8 @10Mbps @5Mbps LTE-FDD B20 @10Mbps @20Mbps Page 62 of 77 Shang Hai YUGE Information Technology co., LTD...
  • Page 63 CLM920_NC3 module hardware usage guide @5Mbps LTE-TDD B38 @10Mbps @20Mbps @5Mbps LTE-TDD B39 @10Mbps @20Mbps @5Mbps LTE-TDD B40 @10Mbps @20Mbps @5Mbps LTE-TDD B41 @10Mbps @20Mbps Page 63 of 77 Shang Hai YUGE Information Technology co., LTD...

  • Page 64: Chapter 5 Interface Electrical Characteristics

    High level output voltage VDD_EXT-0.45V VDD_EXT Low level output voltage 0.45V 5.4 Power supply The CLM920 NC3 module input power requirements are as follows: Table 5-3 CLM920 NC3 Module Operating Voltage Parameter Minimum value Typical value Maximum value Input voltage 3.3V...

  • Page 65: Electrostatic Characteristics

    CLM920_NC3 module hardware usage guide 5.5 Electrostatic characteristics There is no overvoltage protection inside the CLM920 NC3 module. The ESD protection is required when the module is used to ensure product quality. EMC design recommendations:  The USB port needs to add TVS on VDD, D+, D- for protection, and the TVS parasitic capacitance on D+/D- is <...
  • Page 66 Test duration: 24 h Temperature:85ºC High Visual inspection: normal Working mode: no packaging, JESD22- temperature Function check: normal no power, no boot A103-C storage RF indicator check: normal Test duration: 24 h Page 66 of 77 Shang Hai YUGE Information Technology co., LTD...

  • Page 67: Chapter 6 Structural And Mechanical Properties

     Appearance  Module mechanical size 6.2 Appearance The CLM920 NC3 module is a single-sided PCBA. The appearance of the module is as follows: Figure 6-1 Appearance of the CLM920 NC3 Figure 6-2 Front view and side view of the module (unit: mm) Page 67 of 77 Shang Hai YUGE Information Technology co., LTD...
  • Page 68 CLM920_NC3 module hardware usage guide The figure below shows the bottom view size of the module: Figure 6-3 Bottom view of the module (unit: mm) Module recommended package: Page 68 of 77 Shang Hai YUGE Information Technology co., LTD...
  • Page 69 CLM920_NC3 module hardware usage guide Figure 6-4 Recommended module package (unit: mm) Page 69 of 77 Shang Hai YUGE Information Technology co., LTD...

  • Page 70: Chapter 7 Packaging And Production

     Production welding 7.2 Module Packaging and Storage The CLM920 NC3 module is packaged in a tray and packaged in a vacuum-sealed bag, with a 10PCS package and a 100PCS package, shipped as a vacuum-sealed bag. The storage of the CLM920 NC3 module module is subject to the following conditions: ...
  • Page 71 Key parameter Preheating zone(40°C~165°C) Heating rate: 1°C/s~3°C/s Average temperature (t1~t2): 70s~120s zone(160°C~210°C) Recirculation zone(> 217°C) (t3~t4): 40s~60s Peak temperature: 235°C~245°C Cooling zone Cooling rate: 2°C/s ≤ Slope ≤ 5°C/s Page 71 of 77 Shang Hai YUGE Information Technology co., LTD...
  • Page 72 Enhanced Data Rate for GSM Evolution European Union Electromagnetic Compatibility Electrostatic Discharge Federal Communications Commission GPRS General Packet Radio Service Global System for Mobile Communication HSDPA High-Speed Downlink Packet Access Page 72 of 77 Shang Hai YUGE Information Technology co., LTD...
  • Page 73 Wireless Wide Area Network 8.3 Encoding method Table 8-2 Time slot allocation table for different levels of GPRS/EDGE Slot class DL slot number UL slot number Active slot number Page 73 of 77 Shang Hai YUGE Information Technology co., LTD...
  • Page 74 MCS 9 = 59.2 kb/s/ time slot 236.8 kb/s 8PSK Table 8-5 Maximum HSDPA rate HSDPA device category Max data rate（peak） Modulation type Category 1 1.2Mbps 16QAM,QPSK Category 2 1.2Mbps 16QAM,QPSK Page 74 of 77 Shang Hai YUGE Information Technology co., LTD...
  • Page 75 Category 1 0.96Mbps QPSK Category 2 1.92Mbps QPSK Category 3 1.92Mbps QPSK Category 4 3.84Mbps QPSK Category 5 3.84Mbps QPSK Category 6 5.76Mbps QPSK Table 8-7 LTE-FDD DL maximum rate Page 75 of 77 Shang Hai YUGE Information Technology co., LTD...
  • Page 76 "turn off radio equipment" signs.  Traffic Safety: Please comply with local laws or regulations in your country or region regarding the use of wireless devices when driving a vehicle. Page 76 of 77 Shang Hai YUGE Information Technology co., LTD...
  • Page 77  Emergency call: This device uses wireless signals for propagation. Therefore, it is not guaranteed that the network can be connected in all cases, so in an emergency, the wireless device cannot be used as the sole contact method. Page 77 of 77 Shang Hai YUGE Information Technology co., LTD...

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