Huawei MG323 ESD Protection for the Antenna Interface, RF Specifications of the Antenna Interface

Page 32

HUAWEI MG323 GSM M2M Module

 

Hardware Guide

Antenna Interface

4.4 ESD Protection for the Antenna Interface

In practical application, pay attention to the ESD protection for the antenna interface of the MG323 module. Incorrect operation may result in permanent damage to the RF components.

Figure 4-4shows the ESD protection circuit recommended for the antenna interface.

Figure 4-4ESD protection circuit recommended for the antenna interface

HUAWEI Module (Modem)

RF switch

It is recommended that you pay attention to the junction capacitance of the TVS diode when you choose the model of the TVS diode. Ensure that the junction capacitance of the TVS diode is lower than 1 pF.

4.5 RF Specifications of the Antenna Interface

Table 4-2lists the RF specifications of the antenna interface in the MG323 module.

Table 4-2RF specifications of the antenna interface in the MG323 module

Specification

 

 

 

Minimum

Typical

Maximum

Unit

 

 

 

 

 

Value

Value

Value

 

 

 

 

 

 

 

 

 

 

 

Uplink frequency range

 

 

GSM 850

824

 

849

MHz

 

(Mobile station to base transceiver

 

 

 

 

 

 

 

 

E-GSM 900

880

 

915

MHz

 

station)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

GSM 1800

1710

 

1785

MHz

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Issue 06 (2013-06-13)

 

Huawei Proprietary and Confidential

 

 

32

 

Copyright © Huawei Technologies Co., Ltd.

 

 

 

 

 

 

Page 31 Page 33
Image 32
Page 31 Page 33
Contents Issue Date Hardware GuideNo Warranty About This Document HistoryVersion Date Chapter Descriptions CreationVersion Date Chapter Descriptions Specifications of the antenna interface Updated .8 Audio InterfaceUpdated -3 Recommended Contents Electrical and Reliability Features Introduction OverviewFeature Description Overall DescriptionAbout This Chapter Function OverviewDRX=2 DRX=5 DRX=9SMS Gprs Gprs ClassApplication Block Diagram Circuit Block Diagram2Circuit block diagram of the MG323 module B2B Connector Interface Description of the Application InterfacesPin Pin Name Description DC Characteristics Normal Min Tpy MaxReset TermonUART1DCD LedstatusPower Interface OverviewVIO VbatPin No Signal Name Description Vbat InterfaceGND Vcoin DCEVIO Interface Power-On and Power-Off Time SequenceVcoin Interface Pin for resetting the hardware Power-On Time SequencePin for controlling power-on and power-off Reset Signal Control InterfacePower-Off Time Sequence Input Signal Control Pins Pin for network status LEDWorking or Network Status Output Signal Control PinApplication Device Pin No Signal Name Description Feature Direction Uart InterfaceCircuit Recommended for the Uart Interface DCE receive DTE transmits DTE to DCE Data Serial dataDCE data DTE is ready DTE to DCE Terminal ready DCE data set DCE is ready DCE to DTE ReadyClock signal of the SIM card Power supply of the SIM cardData signal of the SIM card Reset signal of the SIM cardGround signal of the SIM card Circuit Recommended for the SIM Card Interface12External circuit for 32 Ω handsets/16 Ω headsets Audio Interface13External circuit for the microphone interface Antenna Installation Antenna InterfaceCoaxial Cable and RF Connector Environmental Type Material ConditionHuawei MG323 GSM M2M Module Hardware Guide Antenna Interface RF Specifications of the Antenna Interface Specification Minimum Typical Maximum Unit ValueESD Protection for the Antenna Interface Uplink frequency range GSM 824 849 MHzSpecification Minimum Typical Maximum Unit Value Specifications of the Antenna Interface Polarization Linear polarization Pattern OmnidirectionalElectrical and Reliability Features Symbol Specification Minimum Value Maximum Value UnitExternal power voltage Extreme Working ConditionsOperating and Storage Temperatures and Humidity Specification Minimum Value Maximum Value UnitPin No Signal Name Electrical Criteria of Application InterfacesFunction Signal Name Waveform Remarks Level Power supplyVoltage great drop. The Vbat power voltage Than 3.3Pins 41, 43, 45, 47, and 49 are power GND External Power pinVBAT=0 LedstatuUART1DSR UART1RTS UART1DTR UART1CTS UART1DCD UART1 UART1RDUART1RIN Power Supply Features Input Power SupplyWorking Current Parameter Minimum Value Typical Value Maximum Value UnitBand Typical Unit Working Mode Typical value Unit RemarkConfiguration Reliability Features Configuration ValueUp/1 Down 123 Test Condition StandardTest Condition Standard EN61000-4-2 ±4 kV ±8 kV ESD FeaturesESD Test Standard Contact Discharge Air Discharge Dimensions L x W x H 35 mm x 32.5 mm x 3.05 mm Mechanical SpecificationsDimensions Dimensions of the B2B Connector 1Dimensions of the MG323 module unit mmModel Stacking HRS Number Height mm MG323 Module Installation Description 5Structure fixing hole6MG323 module installation Specification Selection for Fasteners 7Machine screw dimensions8Nut dimensions Appendix a Circuits of Typical Interfaces 1Circuits of typical interfaces in the MG323 moduleAppendix B Acronyms and Abbreviations Acronym or Abbreviation ExpansionPbcch PCBPDU RTC
Related manuals
Manual 239 pages 48.54 Kb
Top Page Image Contents