In this article we will discuss Typical Electrostatic discharge (ESD) Problems and Common Solutions. Electrostatic discharge (ESD) is a common phenomenon that is encountered on an everyday basis by many of us. It is the sudden flow of electrical energy between two objects of differing electrical potential (or charge). ESD is essentially a lightening bolt on a very small scale and, like a lightening bolt, the electrical energy will try to find a low impedance path to ground in order to equalise the electrical potential. Anybody who has walked across a carpeted floor and touched a metal doorknob may have felt or even seen a small spark jump from their hand to the metal doorknob.
We often get asked what is EMC testing, why is it testing performed, who should be performing EMC testing and how do we do the testing. So this brief article will attempt to answer these questions in a non technical manner. Hopefully after this you will understand why compliance testing is so important, why using a testing laboratory that can perform the testing correctly is critical and what you should consider when choosing an EMC testing laboratory.
EMC compliance for HDMI Radiated Emissions testing (EMI) in Australia is a subject that many designers face with HDMI been incorporated into many consumer products. At EMC Bayswater we quite often see high speed data ports with cables that connect to various other products such as Ethernet Local Area Networks (LAN), HDMI etc. Many times these ports have been developed over years and have defined drivers with suitable filtering and so forth. HDMI poses a similar problem to the computer monitor video signal of the past apart from using faster data speeds and been much more complex.
Following on from our last post we have decided to layout the foundations of a basic EMC test plan template. This basic template provides a means to at least determine how to formulate a template for your company for future compliance testing requirements. The test plan should be stored along with the test report, EMC testing quote and other technical documentation in the compliance folder for future reference. This helps trace back technical decisions and allows trace-ability.
We often request that customers complete a test plan prior to been able to quote for testing this article will explain why an EMC test plan is so important. Customers new to testing often ask the question “how to write an EMC Test Plan”. So following on from our previous post; Electromagnetic Compatibility Testing Requirements we wanted to go over and provide guidance on how to get your EMC testing project started. The EMC test laboratory should be able to assist you to some level with helping answer some more of the technical issues. However as the manufacture or importer, you are responsible for the completing the declaration of conformity!
Customers are required to prepare their product in the correct configuration for FCC Part 15 EMC testing. This includes the functionality or operation and also the associated cabling and much more. This brief blog article will highlight some of the requirements. FCC Part 15, Subpart B and also Innovation, Science and Economic Development (ISED) previously Industry Canada (ICES 003 etc) references the methods as per ANSI C63.4: 2014.