Radio Frequency Testing

In the current era of booming wearable devices, smartwatches integrate multiple functions such as communication, health monitoring, navigation and payment, and their internal electromagnetic environment is becoming increasingly complex. In order to ensure that smartwatches can operate stably in real usage scenarios without interfering with other devices, electromagnetic compatibility testing has become a necessary step before product launch.

EMC testing aims to evaluate the performance of equipment in two aspects: one is the magnitude of electromagnetic interference generated by itself, namely electromagnetic interference EMI testing; The second is its ability to resist external electromagnetic interference, namely electromagnetic immunity EMS testing. For manufacturers planning to launch their products on the market, a thorough understanding of the testing process is crucial.

1、 Understanding the necessity of EMC testing for smartwatches

Due to its close contact with the human body, the electromagnetic safety of smartwatches is particularly critical. The primary purpose of conducting this test is to meet regulatory access requirements, whether it is the CE mark required to enter the EU market, FCC certification in the US market, or mandatory product certification in the Chinese market, EMC is an indispensable core link.

Ensuring user experience is a key factor. Imagine that a smartwatch monitoring heart rate may experience abnormal data due to nearby phone calls or interfere with the normal use of hearing aids, which is unacceptable. Testing can effectively prevent such problems.

To enhance the overall competitiveness of products, an authoritative EMC testing report is a powerful proof of excellent product design and quality, which can significantly enhance the trust between buyers and consumers.

2、 The main content covered by EMC testing

The electromagnetic interference (EMI) testing section mainly includes conducted interference testing and radiated interference testing. Conducted disturbance testing measures the noise level emitted by a smartwatch through a charging cable or data cable. The radiation disturbance test evaluates the electromagnetic noise intensity emitted by the equipment through space radiation.

The electromagnetic immunity EMS testing section focuses more on the stability of the product in various interference environments. This includes electrostatic discharge immunity testing, simulating the direct and indirect discharge of human static electricity on the watch case, screen, or interface, to test whether it will reset or fail.

3、 Complete steps for conducting EMC testing

The first step is to clarify the testing basis and level. Determine the specific EMC standard version specified by the target market and select the appropriate testing severity level based on the expected usage environment of the product.

The second step is to fully prepare technical documents and samples. The technical materials that need to be compiled include but are not limited to product specifications, complete circuit schematics, printed circuit board diagrams, user manuals, and a list of key components.

The third step is to deliver the packaged smartwatch sample to a qualified testing institution. Our GTG Guangce Group is equipped with a complete set of advanced EMC testing facilities and an experienced technical team, which can provide customers with accurate and efficient testing services.

The fourth step is to perform comprehensive testing and problem diagnosis. The laboratory conducts tests on all applicable ports according to standards. If the product has both cellular mobile communication or WiFi, Bluetooth and other functions, it must also comply with the relevant special regulations of wireless devices.

The fifth step is to implement rectification and review verification. If there are any non-conforming items in the initial test, our engineers will rely on the test data to assist in analyzing the source of interference and provide effective improvement solutions until all projects are ultimately approved.

The sixth step is to issue a formal report and extend the application. After passing the test, you will receive a legally binding official EMC testing report. This report is the cornerstone that supports the completion of global multi country certification applications for the product.

4、 Common challenges and coping strategies in testing

Excessive radiation emission is a common occurrence. The main reason may be related to the wiring design of the high-frequency main control chip and display screen driver circuit. Consider optimizing the return path of high-speed signals and adding measures such as magnetic beads or filters at the power inlet.

Another common problem is that static discharge causes the touch screen to malfunction. This situation can be solved by improving the grounding design, adding protective devices at sensitive circuit nodes, and using insulation isolation in the structure.

5、 Core recommendations for enterprises

It is recommended that companies pay attention to EMC design during the product development phase. If these issues are not considered in the early stages and modifications are made after testing discovers problems, it often consumes more time and resources.

Scientific planning of project progress is also important. We should fully consider the time required for testing and potential corrective actions, and incorporate them into the overall product planning to avoid affecting the established market pace.

Deepening cooperation with professional technical institutions is also very beneficial. Choosing a partner like GTG Guangce Group, who has both profound technical expertise and a complete service system, can provide strong support in technical prediction, problem positioning, and solution implementation.

In summary, EMC testing of smartwatches is an essential quality assurance process for their commercialization. Through careful preparation and standardized professional operations, enterprises can better control this complex process.

If you have any specific standards, implementation plans, or questions about EMC testing for smartwatches, please feel free to consult at any time. You can directly contact Mr. Deng at 13925591357. We, GTG Guangce Group, are always committed to providing customers with comprehensive testing and certification services, helping our products smoothly enter the global market.