Requirement and measurement methods of electromagnetic compatibility for cellular mobile telecommunication equipment Part 18:5G user equipment and ancillary equipment
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YD/T 2583 Requirement and Measurement Methods of Electromagnetic Compatibility for Cellular Mobile Telecommunication Equipment currently includes the following parts:
— Part 1: General Requirements of Base Station and Ancillary Equipment;
— Part 2: General Requirements of User Equipment and Ancillary Equipment;
— Part 3: Multi-standard Base Station and Ancillary Equipment;
— Part 4: Multi-standard Radio (MSR) Mobile Terminal and Ancillary Equipment;
— Part 5: 900/1800MHz TDMA Base Station and Ancillary Equipment;
— Part 6: 900/1800MHz TDMA User Equipment and Ancillary Equipment;
— Part 7: TD-SCDMA Base Station and Ancillary Equipment;
— Part 8: TD-SCDMA User Equipment and Ancillary Equipment;
— Part 9: WCDMA Base Station and Ancillary Equipment;
— Part 10: WCDMA User Equipment and Ancillary Equipment;
— Part 11: cdma2000 Base Station and Ancillary Equipment;
— Part 12: cdma2000 User Equipment and Ancillary Equipment;
— Part 13: LTE Base Station and Ancillary Equipment;
— Part 14: LTE User Equipment and Ancillary Equipment;
— Part 15: Narrow Band-Internet of Things (NB-IoT) Base Station and Ancillary Equipment;
— Part 16: Narrow Band-Internet of Things (NB-IoT) User Equipment and Ancillary Equipment;
— Part 17: 5G Base Station and Ancillary Equipment;
— Part 18: 5G User Equipment and Ancillary Equipment.
This standard is Part 18 of YD/T 2583 Requirement and Measurement Methods of Electromagnetic Compatibility for Cellular Mobile Telecommunication Equipment.
This standard is prepared in accordance with the rules given in GB/T 1.1—2009.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. The issuing body of this standard shall not be held responsible for identifying any or all such patent rights.
This part was proposed by and is under the jurisdiction of China Communications Standards Association.
This standard is prepared by: China Academy of Information and Communications Technology (CAICT), Zhongxing Telecom Equipment (ZTE) Corporation, Huawei Technologies Co., Ltd., Shenzhen Academy of Information and Communications Technology, Guangdong OPPO Mobile Communications Co., Ltd., China Telecom Group Co., Ltd., Lenovo Mobile Communications Technology Co., Ltd., Beijing Samsung Communication Technology Research Co., Ltd., Qualcomm Wireless Communication Technology (China) Co., Ltd., and Shanghai Nokia Bell Co., Ltd.
The main preparers of this standard are: Liu Baodian, An Hui, Zhou Yi, Xie Yuming, Zhang Xinghai, Luo Senwen, Zheng Ke, Zhou Rui, Liu Dianming, Cao Jinfei, Lan Jiangpeng, Tan Rumeng, Lv Feiyan, Han Bin, Jin Yiran, and Zhang Kun.
Requirement and Measurement Methods of Electromagnetic Compatibility for Cellular Mobile Telecommunication Equipment
Part 18: 5G User Equipment and Ancillary Equipment
1 Scope
This standard specifies the electromagnetic compatibility requirements for 5G user equipment and ancillary equipment of cellular mobile telecommunication equipment, including measurement methods, frequency ranges, limits and performance criteria.
It also applies to user equipment for portable and vehicle use, user equipment that uses power supply and is used in a fixed location, as well as all kinds of data terminal equipment in 5G cellular communication systems.
2 Normative References
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced documents (including any amendments) applies.
GB 17625.1 Electromagnetic Compatibility—Limits—Limits for Harmonic Current Emissions (Equipment Input Current ≤16A per Phase)
GB/T 17625.2 Electromagnetic Compatibility —Limits—Limitation of Voltage Fluctuations and Flicker in Low-voltage Supply Systems for Equipment with Rated Current ≤16A
GB/T 17626.2 Electromagnetic Compatibility (EMC)—Testing and Measurement Techniques—Electrostatic Discharge Immunity Test
GB/T 17626.3 Electromagnetic Compatibility—Testing and Measurement Techniques—Radiated Radio-Frequency Electromagnetic Field Immunity Test
GB/T 17626.4 Electromagnetic Compatibility—Testing and Measurement Techniques—Electrical Fast Transient/Burst Immunity Test
GB/T 17626.5 Electromagnetic Compatibility—Testing and Measurement Techniques—Surge Immunity Test
GB/T 17626.6 Electromagnetic Compatibility—Testing and Measurement Techniques—Immunity to Conducted Disturbances Induced By Radio-Frequency Fields
GB/T 17626.8 Electromagnetic Compatibility—Testing and Measurement Techniques—Power Frequency Magnetic Field Immunity Test
GB/T 17626.11 Electromagnetic compatibility—Testing and Measurement Techniques—Voltage Dips, Short Interruptions and Voltage Variations Immunity Tests
GB/T 17626.29 Electromagnetic Compatibility—Testing and Measurement Techniques—Voltage Dips, Short Interruptions and Voltage Variations on D.C. Input Power Port Immunity Tests
GB/T 18655 Vehicles, Boats and Internal Combustion Engines—Radio Disturbance Characteristics—Limits and Methods of Measurement for The Protection of On-Board Receivers
GB/T 21437.2 Road Vehicles—Electrical Disturbances from Conduction and Coupling—Part 2: Electrical Transient Conduction Along Supply Lines Only
GB/T 9254 Information Technology Equipment—Radio Disturbance Characteristics—Limits and Methods of Measurement
GB/T 6113.104 Specification for Radio Disturbance and Immunity Measuring Apparatus and Methods—Part 1-4: Radio Disturbance and Immunity Measuring Apparatus—Antennas and Test Sites for Radiated Disturbance Measurements
YD/T 1483 Technical Requirement and Measurement Method of Spurious Emission of Radio Equipment
CISPR 16-2-3 Specification for Radio Disturbance and Immunity Measuring Apparatus and Methods—Part 2-3：Methods of Measurement of Disturbances and Immunity-Radiated Disturbance Measurements
ITU-T R64 Determination of Sensitivity/Frequency Characteristics of Local Telephone Systems
3 Terms, Definitions and Abbreviations
3.1 Terms and Definitions
For the purposes of this document, the following terms and definitions apply.
3.1.1
User Equipment (UE)
Equipment that can access mobile cellular services through one or more wireless interfaces. When this equipment accesses mobile cellular services, it can be stationary or mobile within the cellular service area, and the equipment can provide services to one or more users at the same time.
3.1.2
Ancillary Equipment (AE)
Equipment used in connection with wireless communication equipment, with the following conditions met:
— being connected to wireless communication equipment to provide additional operational or control features, such as extending the operation or control to other locations;
— cannot be used independently of the wireless equipment, otherwise it cannot provide user functions alone;
— the wireless communications equipment to which it is connected is still capable of implementing the preset operations such as transmitting and/or receiving without this ancillary equipment (i.e., the ancillary equipment is not the subunit of the basic function of master equipment)
3.1.3
Associated Measurement Equipment (AME)
Equipment, such as a base station simulator, that facilitates the UE's normal operation and/or monitors its working status. The AME should be placed outside the test area, but it may also be placed in the test area.
3.1.4
Channel Bandwidth
The single-carrier transmission bandwidth configured in the uplink and downlink of the cell. The channel bandwidth unit is MHz, which provides a reference for the radio frequency equipment of the transmitter and receiver.
3.1.5
Enclosure Port
Physical boundary of the equipment, through which the electromagnetic field radiates or penetrates; in case of a plugin, the physical boundary is defined by the host unit
3.1.6
Traffic Mode
The mode in which the user equipment is turned on and has established a connection with the radio resource control (RRC) module.
3.1.7
Idle Mode
The mode in which user equipment is turned on but no RRC connection is established.
3.1.8
Integral Antenna
The antenna is permanently attached to the equipment and is considered part of the enclosure port, and may be an internal or external antenna.
3.1.9
Maximum Throughput
The maximum amount of successfully transmitted data (measured in bits, bytes, packets, etc.) per unit time for the reference test channel.
3.1.10
Necessary Bandwidth
The bandwidth required to guarantee the quality and transmission rate of information transmission under specified conditions for a given type of transmission.
3.1.11
Out of Band Emissions
Emissions at one or more frequencies just outside the necessary bandwidth resulting from the modulation process, which exclude spurious emissions.
3.1.12
Port
Particular interface between specified equipment (and external electromagnetic environment (as shown in Figure 1)
Figure 1 Examples of Ports
交流电源端口 AC power port
直流电源端口 DC power port
接地端口 Earthing port
机箱端口 Enclosure port
信号/控制端口 Signal/control port
天线端口 Antenna port
有线网络端口 Wired network port
3.1.13
Spurious Emission
Transmission on a single or multiple frequency points outside the necessary bandwidth, the level of which may be reduced without affecting the corresponding information transmission. Spurious emissions include harmonic emissions, parasitic emissions, intermodulation products and frequency conversion products, except for out-of-band emissions.
3.1.14
Wired Network Port
This port is intended for the transmission of voice, data and signals, and is directly connected to single-user or multi-user communication networks such as public telephone networks, xDSL, Ethernet and similar networks.
3.1.15
Throughput
The maximum number of valid data bits per second that can be successfully received for the reference test channel under specified circumstances.
3.1.16
Transient Phenomena
A disturbance within a short time interval which cannot be distinguished as two consecutive stable conditions.
3.1.17
Vehicular Equipment
A piece of equipment that is permanently installed on a vehicle and is powered by the vehicle's power supply system, or that is used on a vehicle and is equipped with a vehicle power adapter which is supported by the vehicle's power supply system.
3.1.18
Common-mode Absorption Device
A device to be mounted on cables leading out of the radiated emission measurement test space to reduce compliance uncertainty.
3.2 Abbreviations
For the purposes of this document, the following abbreviations apply.
AC Alternating Current
BWChannel Channel Bandwidth
DC Direct Current
ERP Ear Reference Point
EUT Equipment Under Test
e.r.p. effective radiated power
FOOB The boundary between the NR out of band emission and spurious emission domains
FUL_high The highest frequency of the uplink Channel bandwidth
FUL_low The lowest frequency of the uplink Channel bandwidth
FR Frequency range
NR New Radio
RB Resource Block
RF Radio Frequency
TCH Traffic Channel
TPC Transmit Power Control
UE User Equipment
UTRA Universal Terrestrial Radio Access
UT The rated voltage for the equipment
5G The Fifth Generation
4 Test Conditions
4.1 General Conditions
The test shall be carried out under the conditions of normal operation of the equipment specified by the manufacturer, and the output power level of the UE shall be the level for maximum rated output power.
The test configuration shall be as close as possible to typical conditions of actual use.
When the UE has an integral antenna, the antenna in normal use shall be installed for the test, unless otherwise specified in this Part or the manufacturer declares that the antenna is removable.
If the EUT is part of the system, or is connected to ancillary equipment, the test may be performed with the minimum configuration of the ancillary equipment, and the port connected to the ancillary equipment shall be activated.
If the EUT has a large number of ports, a sufficient number of ports shall be selected to simulate actual operating conditions, and ensure that all different types of ports are included.
The EUT ports that are connected to other equipment in actual use shall be connected to ancillary equipment, associated measurement equipment or a matched load that simulates the impedance of ancillary equipment during the test. For RF input/output ports, a matched load shall be terminated.
The EUT ports that are not connected to other equipment in actual use, such as service ports, program ports or debugging ports, shall not be connected to other equipment during testing. If these ports are to be connected to ancillary test equipment in order to excite the EUT, or if the interconnecting cable must be extended, ensure that the evaluation of the EUT is not affected by the associated measurement equipment or the extension of the cable.
The ancillary measurement equipment shall be placed outside the test area. If placed in the test area, the ancillary measurement equipment shall not affect the test results of the EUT, or its influence shall be excluded.
If the EUT supports multiple operating modes, tests shall be performed in each operating mode. For example, the UE has two operating modes of voice service and data service, and both of them shall be tested.
The disturbance measurement shall be carried out at the mode under which the EUT generates the maximum disturbance during normal operation. During radiation disturbance measurement, in order to measure the maximum radiation disturbance, some necessary measures may be taken, such as moving the cables of the EUT.
The operating frequency range (FR) of the UE is shown in Table 1. For different operating frequency ranges, the test conditions for electromagnetic compatibility may be different.
Foreword IV
1 Scope
2 Normative References
3 Terms, Definitions and Abbreviations
3.1 Terms and Definitions
3.2 Abbreviations
4 Test Conditions
4.1 General Conditions
4.2 Test Arrangement
4.3 Narrowband Response of Receiver
4.4 Test-free Frequency Band
5 Performance Evaluation Methods
5.1 General
5.2 UE Capable of Establishing A Continuous Communication Connection
5.3 UE Incapable of Establishing A Continuous Communication Connection
5.4 Methods Applicable for Evaluation on AE
5.5 Classification of UE
6 Performance Criteria
6.1 General
6.2 Performance Criteria (Continual Phenomenon)
6.3 Performance Criteria (Transient Phenomena)
6.4 Performance Criteria (Discontinued Phenomenon)
7 Applicability
7.1 Disturbance Measurement
7.2 Immunity Test
8 Methods and Limits of Disturbance Measurement
8.1 Radiated Spurious Emission (Enclosure Port)
8.2 Radiation Disturbance (Enclosure port of Ancillary Equipment)
8.3 Conducted Disturbance (DC Power Input/Output Port)
8.4 Conducted Disturbance (AC Power Input/Output Port)
8.5 Conducted Disturbance (Wired Network Port)
8.6 Harmonic Current (AC Power Input Port)
8.7 Voltage Variation, Voltage Fluctuation and Flicker (AC Power Input Port)
8.8 Transient Conducted Phenomena (DC Power Input/Output Port of Vehicular Equipment)
9 Immunity Test Methods and Grades
9.1 Electrostatic Discharge Immunity
9.2 Radiated Radio-Frequency Electromagnetic Field Immunity
9.3 Electrical Fast Transient/Burst Immunity
9.4 Surge (Impact) Immunity
9.5 Immunity to Conducted Disturbances Induced by Radio-frequency Fields
9.6 Power Frequency Magnetic Field Immunity
9.7 Voltage Dip, Short Interruption and Voltage Variation Immunity
9.8 Transient and Surge Immunity (Vehicular Environment)
Annex A (Normative) Measurement Method of Audio Breakthrough
Annex B (Normative) Test Method of Throughput
蜂窝式移动通信设备电磁兼容性能要求和测量方法
第18部分：5G用户设备和辅助设备
1 范围
本部分规定了5G蜂窝式移动通信系统用户设备及其辅助设备的电磁兼容性要求，包括测量方法、频率范围、限值和性能判据。
本部分适用于便携和车载使用的用户设备，也适用于使用电源供电且在固定位置使用的用户设备，同时适用于5G蜂窝式通信系统的各类数据终端设备。
2 规范性引用文件
下列文件对于本文件的应用是必不可少的。凡是注日期的引用文件，仅注日期的版本适用于本文件。凡是不注日期的引用文件，其最新版本(包括所有的修改单)适用于本文件。
GB 17625.1 低压电气及电子设备发出的谐波电流限值(设备每相输入电流≤16A)
GB/T 17625.2 电磁兼容 限值对额定电流不大于16A的设备在低压供电系统中产生的电压波动和闪烁的限制
GB/T 17626.2 电磁兼容 试验和测量技术 静电放电抗扰度试验
GB/T 17626.3 电磁兼容 试验和测量技术 射频电磁场辐射抗扰度试验
GB/T 17626.4 电磁兼容 试验和测量技术 电快速瞬变脉冲群抗扰度试验
GB/T 1 7626.5 电磁兼容 试验和测量技术 浪涌(冲击)抗扰度试验
GB/T 17626.6 电磁兼容 试验和测量技术 射频场感应的传导骚扰抗扰度
GB/T 1 7626.8 电磁兼容 试验和测量技术 工频磁场抗扰度试验
GB/T 17626.11 电磁兼容 试验和测量技术 电压暂降、短时中断和电压变化抗扰度试验
GB/T 17626.29 电磁兼容 试验和测量技术 直流电源输入端口电压暂降、短时中断和电压变化的抗扰度试验
GB/T 18655 车辆、船和内燃机 无线电骚扰特性用于保护车载接收机的限值和测量方法
GB/T 21437.2 道路车辆 由传导和耦合引起的电骚扰 第2部分：沿电源线的电瞬态传导
GB/T 9254 信息技术设备的无线电骚扰限值和测量方法
GB/T 6113.104 无线电骚扰和抗扰度测量设备和测量方法规范 第1～4部分：无线电骚扰和抗扰度测量设备辐射骚扰测量用天线和试验场地
YD/T 1483 无线电设备杂散发射技术要求和测量方法
CISPR 16-2-3 无线电骚扰和抗扰度测量设备和测量方法规范 第2～3部分：无线电骚扰和抗扰度测量方法辐射骚扰测量(Specification for radio disturbance and immunity measuring apparatus and methods-Part 2-3：Methods of measurement of disturbances and immunity-Radiated disturbance measurements)
ITU-T R64 本地电话系统灵敏度/频率特性的测量(Determination of sensitivity/Frequency characteristics of local telephone systems)
3 术语、定义和缩略语
3.1 术语和定义
下列术语和定义适用于本文件。
3.1.1
用户设备 User Equipment (UE)
可以通过一个或多个无线接口访问移动蜂窝业务的设备。这个设备在访问移动蜂窝业务时，在蜂窝业务区域内可以是静止的也可以是移动的，该设备可以同时为一个或多个用户提供服务。
3.1.2
辅助设备 Ancillary Equipment (AE)
与无线通信设备连接的设备，且同时满足下列条件：
—与无线通信设备相连，以提供额外的操作或控制特性，例如把操作或控制延伸到其他位置；
—不能独立于无线设备使用，否则不能单独提供用户功能；
—所连接的无线通信设备在没有此辅助设备时仍能进行发射和/或接收等预定的操作(即辅助设备不是主设备基本功能的子单元)。
3.1.3
辅助测试设备 Associated Measurement Equipment (AME)
辅助UE工作，使UE正常工作和/或监视UE工作状态的设备，例如基站模拟器。辅助测试设备可以放到测试区域内也可以放到测试区域外，宜放到测试区外。
3.1.4
信道带宽 Channel Bandwidth
在蜂窝的上行链路和下行链路中配置的单载波传输带宽。信道带宽单位是MHz，为发信机和收信机的射频设备提供参考。
3.1.5
机箱端口 Enclosure Port
设备的物理边界，电磁场通过该边界辐射或侵入。插件的物理边界由宿主单元定义。
3.1.6
业务模式 Traffic Mode
用户设备处于开启状态，且与无线资源控制模块建立了连接。
3.1.7
空闲模式 Idle Mode
用户设备处于开启状态但没有建立无线资源控制连接。
3.1.8
一体化天线 Integral Antenna
该天线与设备永久连接且被视为机箱端口的一部分，可以是内置的天线或外置的天线。
3.1.9
最大吞吐量 Maximum Throughput
对参考测试信道在单位时间内成功传送数据的最大数量(以比特、字节、分组等为单位测量)。
3.1.10
必要带宽 Necessary Bandwidth
对于给定类型的发射，必要带宽是刚好保证在规定条件下的信息传输质量和传输速率所需的频带宽度。
3.1.11
带外发射 Out of Band Emissions
由调制过程产生的，刚超过必要带宽外的一个或多个频率的发射，不包括杂散发射。
3.1.12
端口 Port
指定设备(装置)与外部电磁环境之间的特定接口，端口示例如图1所示。
交流电源端口
直流电源端口
接地端口
机箱端口
信号/控制端口
天线端口
有线网络端口
图1 端口示例
3.1.13
杂散骚扰 Spurious Emission
必要带宽外的单个或多个频点上的发射，可以减小其电平而不影响相应的信息传输。杂散骚扰包括谐波发射、寄生发射、互调产物及变频产物，但带外发射除外。
3.1.14
有线网络端口 Wired Network Port
该端口以语音、数据和信号的传输为目的，直接连接到单用户或多用户的通信网络，例如公共电话网、xDSL、以太网和类似网络。
3.1.15
吞吐量 Throughput
在特定环境下对于参考测试信道每秒最多能成功接收到的有效数据位。
3.1.16
瞬态骚扰 Transient Phenomena
一个短的时间间隔内的骚扰，不能够分辨为两个连续稳定状态。
3.1.17
车载设备 Vehicular Equipment
固定安装在车辆上由车辆的电源系统供电的设备，或在车辆上使用且配备车载电源适配器使用车辆电源系统供电的设备。
3.1.18
共模吸收装置 Common-mode Absorption Device
安装在引出到辐射发射测量试验空间外的电缆上的装置，以降低符合性不确定度。
3.2 缩略语
以下缩略语适用于本文件：
AC Alternating Current 交流
BWChannel Channel bandwidth 信道带宽
DC Direct Current 直流
ERP Ear Reference Point 耳参考点
EUT Equipment Under Test 被测设备
e.r.p. effective radiated power 有效辐射功率
FOOB The boundary between the NR out of band emission and spurious emission domains NR带外发射与杂散发射域的边界
FUL_high The highest frequency of the uplink Channel bandwidth 上行信道带宽的最高频率
FUL_low The lowest frequency of the uplink Channel bandwidth 上行信道带宽的最低频率
FR Frequency Range 频率范围
NR New Radio 新无线
RB Resource Block 资源块
RF Radio Frequency 射频
TCH Traffic Channel 业务信道
TPC Transmit Power Control 传输功率控制
UE User Equipment 用户设备
UTRA Universal Terrestrial Radio Access 通用陆地无线接入
UT The rated voltage for me equipment 设备的额定电压
5G The Fifth Generation 第五代
4 试验条件
4.1 通用条件
试验应在厂家规定设备正常工作的条件下进行，UE的输出功率电平应为最大额定输出功率电平。
试验配置应尽可能地接近实际使用的典型情况。
当UE具有一体化天线时，应安装正常使用时的天线进行试验，除非在本部分中另有规定或厂家声明天线为可拆装的天线。
如果EUT是系统的一部分，或与辅助设备相连，试验可在辅助设备的最小配置下进行，与辅助设备相连的端口应被激活。
如果EUT有大量的端口，应选取充分数量的端口模拟实际情况的工作条件，并确保包含所有不同类型的端口。
对于EUT在实际使用中与其他设备连接的端口，试验时这些端口应与辅助设备、辅助测试设备或模拟辅助设备阻抗的匹配负载相连。对于射频输入/输出端口，应端接匹配负载。
对于EUT在实际使用中不与其他设备连接的端口，例如服务端口、程序端口、调试端口等，测试时这些端口不与其他设备连接。如果为了激励EUT，这些端口要与辅助测试设备相连，或者互连电缆必须延长时，应确保对EUT的评估不因辅助测试设备或电缆的延长而受到影响。
辅助测试设备宜放置在试验区域外，如果放置在试验区域内，辅助测试设备不应影响EUT的测试结果或其带来的影响应被排除。
如果EUT支持多个工作模式，则在每个工作模式下都应进行试验。例如，UE具有语音业务和数据业务工作模式，两种工作模式都应试验。
骚扰测量时，应在EUT正常工作时产生最大骚扰的模式下进行。辐射骚扰测量时，为使所检测到的辐射骚扰达到最大，可采取某些必要措施，例如移动EUT的线缆等。
UE的工作频率范围(FR)见表1。对于不同的工作频率范围，电磁兼容的试验条件可能不同。
表1 频率范围的定义
名称 频率范围
FR1 450MHz～6000MHz
FR2 24250MHz～52600MHz
试验条件、工作模式和试验配置应记录在报告中。
4.2 试验布置
4.2.1 通用条件
同YD/T 2583.2的4.2.1节。
4.2.2 发信机输入端试验布置
同YD/T 2583.2的4.2.2节。
4.2.3 发信机输出端试验布置
同YD/T 2583.2的4.2.3节。
4.2.4 收信机输入端试验布置
同YD/T 2583.2的4.2.4节。
4.2.5 收信机输出端试验布置
同YD/T 2583.2的4.2.5节。
4.3 收信机的窄带响应
收信机或收/发信机的收信机在进行抗扰度试验时，离散频率的窄带响应应通过以下方法来判定：
—在抗扰度试验时(见9.2和9.5节)，窄带响应和宽带现象都可能使受试设备出现不符合本文件规定的性能判据(见6.2节)的情况，在此情况下，应通过调整干扰信号的频率判断是窄带响应还是宽带现象；
—将测试频率偏置±1×BWChannelMHz，重复测试，如果不符合的情况消失，则这种情况为窄带响应；
—如果不符合的情况未消失，则可能为另一个干扰信号所引起的窄带响应，在此情况下，将测试频点偏置±2×BWChannelMHz，重复测试，如果不符合的情况仍未消失，这种情况为宽带现象，即受试设备未通过测试。
窄带响应应被忽略。
4.4 免测频段
4.4.1 通用要求
免测频段是指不进行射频电磁场辐射抗扰度试验的频段。
辅助设备没有免测频段。
4.4.2 收信机免测频段
收信机免测频段的低端频率是收信机接收频段的低端频率减去收信机支持的最大信道带宽。
收信机免测频段的高端频率是收信机接收频段的高端频率加上收信机支持的最大信道带宽。
4.4.3 发信机免测频段
发信机免测频段为发信机工作的中心频率加减2.5倍受试设备支持的最大信道带宽。
5 性能评估方法
5.1 总则
同YD/T 2583.2的5.1节。
5.2 可以建立连续通信连接的UE
同YD/T 2583.2的5.2节。
5.3 不能建立连续通信连接的UE
同YD/T 2583.2的5.3节。
5.4 评估辅助设备适用的方法
辅助设备应与UE相连接进行试验，与UE一同进行性能评估。
5.5 UE的分类
同YD/T 2583.2的5.5节。
