What is required for EMC testing

What is required for EMC testing

Protection of electromagnetic spectrum

We have an extremely limited electromagnetic spectrum that we can use for radio transmission, microwave communication, x-ray machines, and many other products.

Unfortunately, even electronic devices without transmitters emit electromagnetic radiation, such as the switching currents typical of electronic circuits and a byproduct of voltage. Without limiting the amount of unwanted electromagnetic radiation from electronic products, the electromagnetic spectrum can be adversely affected and frequency bands reserved for radio transmission can be compromised.

As the number of non-wireless and wireless electronic products continues to increase, the pre-packaged electromagnetic spectrum will become even more crowded. Maintaining this important resource is critical to ensuring that devices continue to function properly in the future.


For many products and industries, EMC performance can mean the difference between life and death. Many medical, military, industrial, aerospace and automotive products (and others) have security-critical applications.

If these products fail to function due to electromagnetic phenomena such as power supply fluctuations, ESD, or radiation electric fields, lives can be at risk. Imagine that all 300 arsenals deliver 3600 Watts of 7 feet in an airplane - rigorous EMC testing to ensure that electrical systems can withstand such electromagnetic environments.


Product performance (quality)

The function and performance of an electronic product can be easily affected by external and internal EMC phenomena. For example, if your internal power supply arrangement is too noisy, it may adversely affect sensitive analog measurements (for sensor products) or reduce the performance of a wireless transmitter (for wireless products). Both are examples of internal EMC problems.

Externally, applied EMC phenomena can negatively affect an almost unlimited number of products, from data corruption to measurement accuracy, from RF performance to frying ICs. The EMC test helps ensure that your device continues to function as expected in a typical EMC environment and reduces the return rate of the product to poor EMC performance (hopefully).

Engaging test labs and government officials See the Manufacturers being sarcastic about the whole process, given the lab's EMC test results, perhaps the large test price tag applied regardless of sales volume and the size of the company, and the well-documented variability of the cut volume of non-compliant devices entering the market each year.

A formal 2013 report on a Europe-wide non-conformity:> 35% non-compliance with technical requirements and> 60% non-compliance with documentation.

It is true that EMC testing can be a major burden to both small and large manufacturers, and its effectiveness can sometimes be discussed. But the rules arose from real problems (see history below), and government and private infrastructure grew to accommodate and enforce these rules.


EMC test penalties If you are caught with a device that is not compatible with the market, fines and actions may vary from insignificant to terrible levels.

Fish & Richardson, the legal company, has published a summary of legal action against the FCC.

EMC tests;

  • Radio and telecommunications equipment
  • Automotive Electronics
  • Medical Device
  • Information Equipment
  • Household and commercial products
  • Household and electrical appliances (household or industrial)
  • Lighting
  • Laboratory equipment
  • Electric toys
  • Heavy industry products
  • Construction machinery and equipment
  • Security systems and alarms
  • Railway Equipment
  • Health, fitness and beauty products 


We do the tests with these devices

  • Antenna immunity to RF voltage (S2b)
  • Antenna input immunity (S1)
  • Antenna screening effectiveness (S4)
  • Conducted disturbances immunity
  • Conducted emissions (continuous and discontinuous interference)