SI/PI /EMC
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Name A Video phone
【Customer】： A network equipment company in Shenzhen 【Product】： Video phone terminal 【Technical Class】： RE EN55022 CLASS B 【Technical Difficulty】： It is a consumer product, with high delivery quantity. It is required that its plastic case should pass CLASS B. The plastic cover should not be sprayed with conductive paint and furthermore should not be configured with a shielding mask (including partial shielding). The cost is strictly controlled. 【Countermeasure】： Inspection, optimized principle scheme; model selection of components; redoing PCB design. 【Result】： In August 2004, the device successfully passed the RE EN55022 CLASS B test at the professional EMC laboratory of Shenzhen Huatongwei International Inspection Co., Ltd. -
Name ADSL device successfully passed EMC test
【Customer】： A well-known domestic data communication enterprise in Beijing. 【Product】： ADSL equipment 【Technical Class】： RE EN55022 CLASS B 【Technical Difficulty】： This product is quite sophisticated, and the non-shielding scheme has passed CLASS B, while the cost is strictly controlled. Its hardware was developed for the first time without a prototype device for reference. 【Countermeasure】： Inspection, optimized principle scheme; model selection of components; simulation analysis and excellent PCB design. 【Result】： In April 2005, the device successfully passed the EN55022 CLASS B test organized by China TTL lab, an authoritative EMC institution in China. -
Name A video device successfully passed EMC test
【Customer】： A well-known domestic video manufacturer in Suzhou 【Product】： Video device 【Technical Class】： RE EN55022 CLASS B 【Technical Difficulty】： This product is quite sophisticated, without a variety of board power supplies and crystal oscillators. The main board has over 10,000 pins, with a variety of input/output interfaces. There are over 20 ports - AUDIO, VIDEO, VGA, S terminal, E1, 232, 422, 485,Ethernet, and so on. 【Countermeasure】： Model selection of components;principle design;simulation analysis; excellent PCB design; proper frame and optimized cables. 【Result】： In May 2005, the product successfully passed the EN55022 CLASS B test organized by China TTL lab, an authoritative EMC institution in China. -
Name EMC rectification & improvement of board for an IPv6 10G core routing switch
【Customer】： A large-scale communication enterprise in Beijing 【Product】： Telecom-class IPv6 10G core routing switch 【Technical Difficult】： The original design does not take full consideration of the EMC requirement, resulting in failure in passing the EMC test, and the market pressure leads to board rectification necessity. It is an urgent task with tight time limit, and we are not allowed to conduct correction and adjustment in the whole office. The signal on the board can reach a maximum rate of 3.125G, and multiple optical interfaces are provided. 【Countermeasure】： After checking the schematic diagram and making PCB design, on-site work, we completed the task ahead of scheduel. 【Result】： In February 2006, the customer informed us that our design had successfully passed the test by Shanghai Moore Laboratory. -
Timing analysis
【Interface】： PPC Bus, CPCI 【Standard】： Common Clock, CPCI SPEC 【Standard】： 200M 【SI setting】： This is a standard CPCI structure，There is CPCI bus, PCIE Bus. The key ICs, CPU：MPC7448，PCI bridge：MV64460. For Parallel I/O system, 200M may touch the limit. -
10G High Speed Backplane: Simulation for Eye Diagram
【Interface】： 10G-KR 【Standard】： 802.3ap 【Standard】： 10Gpbs 【SI setting】： Output from optical device. The transmission distance in Line card is 3.5inch. In Backplane is 11inch. Then go to another line card by High speed connector for 4inch. -
10G High Speed Backplane: Simulation for Transmission path
【Interface】： 10G-KR 【Standard】： 802.3ap 【Standard】： 10Gpbs 【SI setting】： Output from optical device. The transmission distance in Line card is 3.5inch. In Backplane is 11inch. Then go to another line card by High speed connector for 4inch.
