const searchPopup_search_default = document.getElementById('search-default-content');const searchInput_search_default = document.getElementById('search-default-input'); // 监听实例的弹窗显示状态变化 const observer_search_default = new MutationObserver(() => {// 当弹窗从隐藏变为显示时,执行当前实例的输入框聚焦 if (searchPopup_search_default.style.display !== 'none' && !searchPopup_search_default.hidden) {searchInput_search_default.focus(); // 核心聚焦方法 // 可选:聚焦后选中输入框内内容,方便直接替换(按需开启) // searchInput_.select(); observer_search_default.disconnect(); // 聚焦一次后断开,避免重复触发 }}); // 启动当前实例的监听,仅监听自身弹窗的属性变化,各实例完全独立 observer_search_default.observe(searchPopup_search_default, {attributes: true,attributeFilter: ['style', 'hidden', 'class'] // 仅监听关键属性,性能最优 });

Use the instrument

This catalog is used to summarize the operating instructions and quick operation guides of the equipment prepared by our company, for details, click the title of the article below to view the specific operation methods. After-sales service is not available for instruments not sold by our company.

The following study materials are currently categorized:

Total number of published study materials in current category: 27; Total number of materials in current page: 8.

Measurement of conducted disturbances at dc ports of photovoltaic inverters using DC-AN

Measurement of conducted disturbances at dc ports of photovoltaic inverters using DC-AN

EMC AC conducted emissions from PV inverters connected to grid terminals are usually measured according to the CISPR 16-1-2 standard and using a dedicated V-LISN. However, PV inverters may cause ripple currents on the DC output side of the inverter...

How to choose a near-field probe?

How to choose a near-field probe?

There are a lot of various test frequencies and shapes of EMC near-field probe on the market, we all know that the role of the near-field probe is to detect and solve the problem of EMC radiated emission interference exceeds the standard, this article from the near-field measurements and far-field measurements of the principle and difference...

How do I ensure repeatability in measuring common mode currents in cables?

How do I ensure repeatability in measuring common mode currents in cables?

When measuring the common mode current conduction emission of EUT cables, it is important to ensure the repeatability of the EMC-CE measurements. If the test environments and conditions in Laboratory A and Laboratory B are completely different, the two laboratories will get different common mode current...

How can I improve the signal-to-noise ratio of my spectrum analyzer and current probe measurements?

How can I improve the signal-to-noise ratio of my spectrum analyzer and current probe measurements?

This article focuses on how to improve the signal-to-noise ratio of spectrum analyzer and current probe measurements, the higher the signal-to-noise ratio, the higher the dynamic range of the entire test system. Spectrum analyzer has many test methods, we only use the current probe test method to analyze how to improve...

How to Improve the Signal-to-Noise Ratio of FCC Current Probes

How to Improve the Signal-to-Noise Ratio of FCC Current Probes

When using FCC current probes for common-mode conduction current (CE) measurements, we need to pay special attention to the signal-to-noise ratio of the entire test system if very small common-mode currents are being measured, because the FCC current probes are connected to the receiver (spectrum analyzer...

Is the near-field probe probing an electric or magnetic field?

Is the near-field probe probing an electric or magnetic field?

Near-field probe is divided into electric near-field probe and magnetic near-field probe two kinds, want to understand the near-field probe is the electric field or magnetic field, we first need to understand the working principle of the two kinds of near-field probe. Then you can choose the right near-field probe according to the test requirements...

RS232 serial communication how to use DB9 connector

RS232 serial communication how to use DB9 connector

RS232 is also called serial communication, commonly used in electromagnetic compatibility test equipment communication interface, when we encounter the use of RS232 serial communication equipment, the following to understand how to correctly configure the DB9 connector pin as well as how to tester with ...

Oscilloscope Selection Methods-Part IV

Oscilloscope Selection Methods-Part IV

Oscilloscope selection should focus on bandwidth, accuracy, and rise time parameters, which are critical for accurately displaying the actual waveform of the signal under test.

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