WO2020192329A1 - 一种家庭网关类通信终端未能通过传导骚扰试验的调整方法 - Google Patents

一种家庭网关类通信终端未能通过传导骚扰试验的调整方法 Download PDF

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WO2020192329A1
WO2020192329A1 PCT/CN2020/076505 CN2020076505W WO2020192329A1 WO 2020192329 A1 WO2020192329 A1 WO 2020192329A1 CN 2020076505 W CN2020076505 W CN 2020076505W WO 2020192329 A1 WO2020192329 A1 WO 2020192329A1
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adjustment
test
communication terminal
home gateway
fails
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PCT/CN2020/076505
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French (fr)
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曹鹏
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太仓市同维电子有限公司
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/28—Testing of electronic circuits, e.g. by signal tracer
    • G01R31/2801—Testing of printed circuits, backplanes, motherboards, hybrid circuits or carriers for multichip packages [MCP]
    • G01R31/281—Specific types of tests or tests for a specific type of fault, e.g. thermal mapping, shorts testing
    • G01R31/2815—Functional tests, e.g. boundary scans, using the normal I/O contacts
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/66—Arrangements for connecting between networks having differing types of switching systems, e.g. gateways

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  • the invention relates to the technical field of electronic equipment PCBs, in particular to the field of protection against conducted disturbances of electronic equipment, and in particular to an adjustment method for home gateway communication terminals that fail to pass conducted disturbance tests.
  • the purpose of the present invention is to provide a method for adjusting the home gateway type communication terminal failing the conducted disturbance test, which solves the problem that the existing home gateway type communication terminal cannot easily pass the conducted disturbance test without increasing the equipment and cost. problem.
  • a method for adjusting a home gateway type communication terminal that fails the conducted disturbance test includes the following steps:
  • Step 1 When conducting a conducted disturbance test, first check whether the equipment passes the required level of the conducted disturbance test;
  • Step 2 If the conducted disturbance test fails, check whether the Ethernet port failed, or the voice port test failed, or the AC power port test failed;
  • Step 3 Regarding the failure of the Ethernet port, finally adopting adjustment plan 1, adjustment plan 2, and adjustment plan 3, and finally adopting adjustment plan 4 and adjustment plan 5 for the AC power port test if the voice port test fails In the case of failure, the final adjustment plan 6 will be adopted;
  • the adjustment scheme 1 processing the Smith circuit of the network transformer on the single board, using high-voltage capacitors in series with magnetic beads;
  • the said adjustment scheme 2 Deal with the network transformer, according to the analysis of the frequency point of the conducted disturbance exceeding the standard, if the frequency point is in the range of 5MHZ-30MHZ, use the network transformer with double common mode inductance before and after, if it is within 50KHZ-5MHZ, the noise It is in differential mode and has nothing to do with the network transformer;
  • the said adjustment scheme 3 effectively filter the transmission line on the network transformer, and adopt the method of series resistance and parallel capacitance on the transmission line to reduce the noise on the signal line;
  • the said adjustment scheme 4 For the conduction disturbance of the voice telephone port exceeds the standard, the clock signal is connected in series with a resistor and a high-voltage capacitor in parallel;
  • the said adjustment scheme 5 In view of the noise brought out by spatial coupling and crosstalk on the voice signal line, two high-voltage capacitors are connected in series between the voice signal line, and the two high-voltage capacitors are grounded;
  • the said adjustment scheme 6 Deal with the noise on the neutral wire and live wire of the power supply adapter. If it is judged to be the noise brought by the power input port, connect a magnetic bead in series with the DC positive and negative wires of the input port; if it is judged that the adapter itself modulates The signal is caused by adding a common-mode inductor to the neutral and live input terminals of the adapter.
  • a further technical solution is that the standard of the conducted disturbance test is GB9254-2008, and the performance CLASS B level is passed.
  • a further technical solution is that, in the adjustment solution 1, the specification of the high-voltage capacitor is 2KV, 1000pF, and the magnetic bead is 100MHZ, 600 ohm.
  • a further technical solution is that in the adjustment solution 3, the series resistance is 5 ohms and the parallel capacitance is 1 pF.
  • a further technical solution is that in the adjustment solution 4, the series resistance is 20 ohms, and the capacitance is 1UF and 10UF in parallel.
  • a further technical solution is that in the adjustment solution 5, the capacitance value is 22 nF.
  • a further technical solution is that, in the adjustment solution 6, the magnetic beads are 100 MHz, 600 ohms, and the common mode inductance value is 25 mH.
  • the frame and structure of the device circuit may not be changed.
  • Figure 1 is a logical block diagram of the implementation of a home gateway type communication terminal that fails to pass the conducted disturbance test adjustment method of the present invention
  • Figure 2 shows an example of the arrangement of desktop equipment when conducting a laboratory test of conducted disturbances.
  • the conducted disturbance test is based on the GB9254-2008 "Radio disturbance limits and measurement methods for information technology equipment", the standard specifies the test methods and test levels.
  • the conduction disturbance test of the home gateway communication terminal in the shielded room refers to the frequency between 150KHZ-30MHZ, the power port 0.15MHZ-0.5MHZ quasi-peak value is below 66-56db( ⁇ v), and the average value is 56-46db( ⁇ v) the following. Between 0.5MHZ-5MHZ frequency, the quasi-peak value is below 56db( ⁇ v), and the average value is below 46db( ⁇ v).
  • the quasi-peak value measured by 5MHZ-30MHZ is below 60db( ⁇ v), and the average value is below 50db( ⁇ v).
  • the signal port 0.15MHZ-0.5MHZ quasi-peak value is below 84-74db( ⁇ v), and the average value is below 74-64db( ⁇ v).
  • the quasi-peak value measured from 0.5MHZ-30MHZ is below 74db ( ⁇ v), and the average value is below 64db ( ⁇ v), so the measured data passes the CLASS B level.
  • a method for adjusting a home gateway type communication terminal that fails to pass the conducted disturbance test including the following steps:
  • Step 1 When conducting the conducted disturbance test, first check whether the equipment passes the required level of the conducted disturbance test.
  • Step 2 If the conducted disturbance test fails, check whether the Ethernet port failed, or the voice port test failed, or the AC power port test failed.
  • Step 3 Regarding the failure of the Ethernet port, finally adopting adjustment plan 1, adjustment plan 2, and adjustment plan 3, and finally adopting adjustment plan 4 and adjustment plan 5 for the AC power port test if the voice port test fails In the case of failure, adjustment plan 6 is finally adopted.
  • the adjustment scheme 1 Process the Smith circuit of the network transformer on the single board.
  • the Smith circuit uses high-voltage capacitors to connect with the single board system.
  • the system often has a lot of noise, and the noise is reversed into the network.
  • Transformers at this time, will cause the network port conducted disturbance noise to be very large, causing the conducted disturbance test to exceed the standard.
  • the traditional method is to remove the high-voltage capacitor, which may cause the problem of radiation emission, but the method of the present invention is to use the high-voltage capacitor in series with magnetic beads, which not only retains the functionality of the Smith circuit but also reduces the conduction of the network port. Harassment value.
  • the specification of the high-voltage capacitor is 2KV, 1000pF, and the magnetic bead is 100MHZ, 600 ohm.
  • the adjustment scheme 2 Deal with the network transformer. There are many specifications of the network transformer, and the effect of common mode suppression is also very different. According to the analysis of the frequency point of the conducted disturbance exceeding the standard, if the exceeding frequency point is within the range of 5MHZ-30MHZ , choose the network transformer with double common mode inductance before and after, if the noise is in the differential mode within 150KHZ-5MHZ, it has nothing to do with the network transformer.
  • the adjustment scheme 3 effective filtering processing is performed on the 8 transmission lines on the network transformer.
  • the traditional method is to add filter capacitors on the transmission line, which will inevitably affect the signal integrity, but the method of the present invention uses series resistance on the transmission line
  • the method of using parallel capacitors to reduce the noise on the signal line has the advantage of facilitating the adjustment of the impedance matching of the signal line without affecting the signal transmission performance.
  • the series resistance is 5 ohms
  • the parallel capacitance is 1 pF.
  • the said adjustment scheme 4 In view of the excessive conduction disturbance of the voice telephone port, it is judged as the influence of the voice boost circuit clock.
  • the normal voice boost circuit clock is provided by the central processing unit chip. If the frequency is between 150KHZ-1MHZ, The reason is that the clock signal of the boost circuit is not processed properly.
  • the traditional method is to connect the clock signal in series with a differential mode inductor.
  • the method of the present invention is a solution of series resistance and parallel high-voltage capacitors, because the resistance and capacitance are much cheaper than differential mode inductors. This method does not affect the performance of the booster circuit, reduces the design cost, and significantly improves the competitiveness of the product.
  • the series resistance is 20 ohms, and the capacitance is 1UF and 10UF in parallel.
  • the adjustment scheme 5 The noise is brought out through spatial coupling and crosstalk on the voice signal line.
  • the noise caused by this reason is often in the form of an envelope, and the over-standard frequency points are concentrated between 10MHZ-30MHZ.
  • the method of the present invention is to connect two high-voltage capacitors in series between the voice signal lines, and then perform grounding treatment between the two high-voltage capacitors, so as to simultaneously filter out common mode and differential noise components.
  • the capacitance value is 22nF.
  • the adjustment scheme 6 Deal with the noise on the neutral wire and the live wire of the power supply adapter. If it is judged to be the noise brought by the power input port, one magnetic bead is connected in series with the DC positive and negative wires of the input port. If it is judged to be caused by the adapter's own modulation signal, add an appropriate common mode inductor to the neutral and live input terminals of the adapter.
  • the magnetic beads are 100 MHz, 600 ohms, and the common mode inductance value is 25 mH.

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  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • General Engineering & Computer Science (AREA)
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Abstract

一种家庭网关类通信终端未能通过传导骚扰试验的调整方法，包括：步骤一，进行传导骚扰试验时，首先查看设备是否通过传导骚扰试验要求的等级；步骤二，如果传导骚扰试验未通过，查看是以太网口未通过，或者语音端口测试未通过，还是由于交流电源端口测试未通过；步骤三，针对以太网口未通过的情况，最终采用调整方案1、调整方案2和调整方案3，针对语音端口测试未通过的情况，最终采用调整方案4、调整方案5，针对交流电源端口测试未通过的情况，最终采用调整方案6。所述调整方法简便、可行、降低家庭网关类通信终端的研发成本，具有较好的性价比和推广价值。

Description

一种家庭网关类通信终端未能通过传导骚扰试验的调整方法 技术领域
本发明涉及电子设备PCB技术领域，特别涉及电子设备的传导骚扰防护领域，尤其涉及家庭网关类通信终端未能通过传导骚扰试验的调整方法。
背景技术
进入21世纪，电子设备发展飞快，日常使用的电子设备非常繁多，电磁环境也是越来越复杂，设备之间的电磁干扰是必须解决的首要问题，尤其是家庭通信终端通讯产品类，这类产品大部分都在室内，密闭狭小的空间中多样的电磁干扰破坏了电子设备的使用。家庭网关通讯类产品外部信号输出接口较多，传输线上噪声必然会对其余设备造成干扰，此时只能靠良好的原理图设计和PCB设计来解决干扰问题。
家庭网关类通信终端设备在传导骚扰测试中不通过的主要原因在于单板上的各种信号输出端口很多，产品结构做的很小，芯片布局布线非常拥挤，造成了输出端口信号线上很容易携带大量的共模和差模噪声，破坏了连接设备的功能。针对这一情况，设计中必须使用规避干扰的途径或者加强防护才能满足测试要求。
发明内容
本发明的目的在于提供一种家庭网关类通信终端未能通过传导骚扰试验的调整方法，解决了现有的家庭网关类通信终端在不增加设备和成本的情况下，不容易通过传导骚扰试验的问题。
为解决上述问题，本发明所采取的技术方案是：
一种家庭网关类通信终端未能通过传导骚扰试验的调整方法，包括以下步骤：
步骤一，进行传导骚扰试验时，首先查看设备是否通过传导骚扰试验要求的等级；
步骤二，如果传导骚扰试验未通过，查看是以太网口未通过，或者语音端口测试未通过，还是由于交流电源端口测试未通过；
步骤三，针对以太网口未通过的情况，最终采用调整方案1、调整方案2和调整方案3，针对语音端口测试未通过的情况，最终采用调整方案4、调整方案5，针对交流电源端口测试未通过的情况，最终采用调整方案6；
所述调整方案1：对单板上网络变压器斯密斯电路进行处理，将高压电容串联磁珠使用；
所述调整方案2：对网络变压器进行处理，根据传导骚扰超标的频率点分析，超标 频点如果在5MHZ-30MHZ范围内，选用前后双共模电感的网络变压器，如果在50KHZ-5MHZ内，噪声处于差模，和网络变压器无关；
所述调整方案3：对网络变压器上传输线进行有效滤波处理，在传输线上采用串联电阻和并联电容的办法来降低信号线上的噪声；
所述调整方案4：针对语音电话口的传导骚扰超标，将时钟信号串联电阻和并联高压电容；
所述调整方案5：针对语音信号线上通过空间耦合和串扰带出了噪声，在语音信号线之间串联两个高压电容，两个高压电容之间再做接地处理；
所述调整方案6：处理供电适配器零线和火线上的噪声，如判断为电源输入端口带出的噪声，则在输入端口直流正负线上各串联一颗磁珠；如判断为适配器本身调制信号引起，在适配器的零线和火线输入端增加一颗共模电感。
更进一步的技术方案是，所述传导骚扰试验的标准为GB9254-2008，通过的是性能CLASS B等级。
更进一步的技术方案是，所述调整方案1中，所述高压电容规格为2KV,1000pF，所述磁珠为100MHZ，600欧姆。
更进一步的技术方案是，所述调整方案3中，串联电阻为5欧姆，并联电容为1pF。
更进一步的技术方案是，所述调整方案4中，串联电阻为20欧姆，电容为1UF与10UF并联。
更进一步的技术方案是，所述调整方案5中，电容值为22nF。
更进一步的技术方案是，所述调整方案6中，所述磁珠为100MHZ，600欧姆，共模电感值为25mH。
采用上述技术方案所产生的有益效果在于：
1，单板产品完成量产后，可以不改变设备电路的框架和结构。
2，显著提高电子设备的研发速度，更快的使设备通过传导骚扰试验。
3，显著提高企业家庭网关类通信终端设备的传导骚扰试验通过率。
4，简便、可行、降低家庭网关类通信终端的研发成本，具有较好的性价比和推广价值。
附图说明
图1为本发明一种家庭网关类通信终端未能通过传导骚扰试验的调整方法实施的逻 辑框图；
图2为实验室测试传导骚扰时台式设备布置的实例。
具体实施方式
为了使本发明的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本发明进行进一步详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不用于限定本发明。
传导骚扰试验是根据GB9254-2008《信息技术设备的无线电骚扰限值和测量方法》，标准规定了测试方法和测试等级。家庭网关类通信终端在屏蔽室内通过传导骚扰试验是指在150KHZ-30MHZ之间的频率，电源端口0.15MHZ-0.5MHZ准峰值在66-56db(μv)以下，平均值在56-46db(μv)以下。0.5MHZ-5MHZ的频率之间，准峰值在56db(μv)以下，平均值在46db(μv)以下。5MHZ-30MHZ测得的准峰值在60db(μv)以下，平均值在50db(μv)以下。信号端口0.15MHZ-0.5MHZ准峰值在84-74db(μv)以下，平均值在74-64db(μv)以下。0.5MHZ-30MHZ测得的准峰值在74db(μv)以下，平均值在64db(μv)以下，这样测得的数据通过的是CLASS B等级。
如图1和图2所示，公开了一种家庭网关类通信终端未能通过传导骚扰试验的调整方法，包括以下步骤：
步骤一，进行传导骚扰试验时，首先查看设备是否通过传导骚扰试验要求的等级。
步骤二，如果传导骚扰试验未通过，查看是以太网口未通过，或者语音端口测试未通过，还是由于交流电源端口测试未通过。
步骤三，针对以太网口未通过的情况，最终采用调整方案1、调整方案2和调整方案3，针对语音端口测试未通过的情况，最终采用调整方案4、调整方案5，针对交流电源端口测试未通过的情况，最终采用调整方案6。
所述调整方案1：对单板上网络变压器斯密斯电路进行处理，斯密斯电路中使用了高压电容与单板系统进行连接，但在实际应用中系统往往噪声比较大，噪声反而反灌入网络变压器，此时就会导致网口传导骚扰噪声很大，引起传导骚扰测试超标。传统的方法是将高压电容去除，此时可能会引起辐射发射的问题，但本发明的方法是将高压电容串联磁珠使用，这既保留了斯密斯电路的功能性又降低了网口的传导骚扰值。所述高压电容规格为2KV,1000pF，所述磁珠为100MHZ，600欧姆。
所述调整方案2：对网络变压器进行处理，网络变压器的规格有很多种，对共模抑 制的效果也有很大差异，根据传导骚扰超标的频率点分析，超标频点如果在5MHZ-30MHZ范围内，选用前后双共模电感的网络变压器，如果在150KHZ-5MHZ内，噪声处于差模，和网络变压器无关。
所述调整方案3：对网络变压器上8根传输线进行有效滤波处理，传统的方法是在传输线上加滤波电容，这样必然会影响信号的完整性，但本发明的方法是在传输线上采用串联电阻和并联电容的办法来降低信号线上的噪声，这样的好处是便于调整信号线的阻抗匹配，不影响信号的传输性能。所述串联电阻为5欧姆，并联电容为1pF。
所述调整方案4：针对语音电话口的传导骚扰超标，判断为语音升压电路时钟的影响，正常的语音升压电路时钟都是中央处理器芯片提供，如果频点在150KHZ-1MHZ之间，则是由于升压电路时钟信号没有处理好，传统的方法是将时钟信号串联差模电感，本发明的方法是串联电阻和并联高压电容的方案，由于电阻和电容相对差模电感价格会便宜很多，此方法并不影响升压电路性能，又降低了设计成本，显著提高产品的竞争力。所述串联电阻为20欧姆，电容为1UF与10UF并联。
所述调整方案5：针对语音信号线上通过空间耦合和串扰带出了噪声，这种原因带来的噪声往往表现形式为包络，超标频点集中在10MHZ-30MHZ之间。本发明的方法是在语音信号线之间串联两个高压电容，两个高压电容之间再做接地处理，这样同时滤除了共模和差摸的噪声成分。所述电容值为22nF。
所述调整方案6：处理供电适配器零线和火线上的噪声，如判断为电源输入端口带出的噪声，则在输入端口直流正负线上各串联一颗磁珠。如判断为适配器本身调制信号引起，在适配器的零线和火线输入端增加一颗合适的共模电感。所述磁珠为100MHZ，600欧姆，共模电感值为25mH。
尽管这里参照本发明的多个解释性实施例对本发明进行了描述，但是，应该理解，本领域技术人员可以设计出很多其他的修改和实施方式，这些修改和实施方式将落在本申请公开的原则范围和精神之内。更具体地说，在本申请公开、附图和权利要求的范围内，可以对主题组合布局的组成部件和/或布局进行多种变型和改进。除了对组成部件和/或布局进行的变形和改进外，对于本领域技术人员来说，其他的用途也将是明显的。

Claims (7)

  1. 一种家庭网关类通信终端未能通过传导骚扰试验的调整方法，其特征在于：包括以下步骤：
    步骤一，进行传导骚扰试验时，首先查看设备是否通过传导骚扰试验要求的等级；
    步骤二，如果传导骚扰试验未通过，查看是以太网口未通过，或者语音端口测试未通过，还是由于交流电源端口测试未通过；
    步骤三，针对以太网口未通过的情况，最终采用调整方案1、调整方案2和调整方案3，针对语音端口测试未通过的情况，最终采用调整方案4、调整方案5，针对交流电源端口测试未通过的情况，最终采用调整方案6；
    所述调整方案1：对单板上网络变压器斯密斯电路进行处理，将高压电容串联磁珠使用；
    所述调整方案2：对网络变压器进行处理，根据传导骚扰超标的频率点分析，超标频点如果在5MHZ-30MHZ范围内，选用前后双共模电感的网络变压器，如果在50KHZ-5MHZ内，噪声处于差模，和网络变压器无关；
    所述调整方案3：对网络变压器上传输线进行有效滤波处理，在传输线上采用串联电阻和并联电容的办法来降低信号线上的噪声；
    所述调整方案4：针对语音电话口的传导骚扰超标，将时钟信号串联电阻和并联高压电容；
    所述调整方案5：针对语音信号线上通过空间耦合和串扰带出了噪声，在语音信号线之间串联两个高压电容，两个高压电容之间再做接地处理；
    所述调整方案6：处理供电适配器零线和火线上的噪声，如判断为电源输入端口带出的噪声，则在输入端口直流正负线上各串联一颗磁珠；如判断为适配器本身调制信号引起，在适配器的零线和火线输入端增加一颗共模电感。
  2. 根据权利要求1所述的一种家庭网关类通信终端未能通过传导骚扰试验的调整方法，其特征在于：所述传导骚扰试验的标准为GB9254-2008，通过的是性能CLASS B等级。
  3. 根据权利要求1所述的一种家庭网关类通信终端未能通过传导骚扰试验的调整方法，其特征在于：所述调整方案1中，所述高压电容规格为2KV,1000pF，所述磁珠为100MHZ，600欧姆。
  4. 根据权利要求1所述的一种家庭网关类通信终端未能通过传导骚扰试验的调整方法，其特征在于：所述调整方案3中，串联电阻为5欧姆，并联电容为1pF。
  5. 根据权利要求1所述的一种家庭网关类通信终端未能通过传导骚扰试验的调整方法，其特征在于：所述调整方案4中，串联电阻为20欧姆，电容为1UF与10UF并联。
  6. 根据权利要求1所述的一种家庭网关类通信终端未能通过传导骚扰试验的调整方法，其特征在于：所述调整方案5中，电容值为22nF。
  7. 根据权利要求1所述的一种家庭网关类通信终端未能通过传导骚扰试验的调整方法，其特征在于：所述调整方案6中，所述磁珠为100MHZ，600欧姆，共模电感值为25mH。
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