Achieving EMC compliance by design - case study of fixed remote station in corDECT WLL system | seminar topics,it seminar topics,latest seminar topics,seminar topics on computer science

Achieving EMC compliance by design - case study of fixed remote station in corDECT WLL system 

 

Abstract

Telecommunication has an important role in society enabling effective voice & data communication between people across the globe. EMC compliance is mandatory and vital for telecom products. This paper deals with the efforts put in during the design & development and EMC testing of such a telecom product - Wireless in Local Loop (WLL) system to comply to International standards like ETSI, IEC & CISPR and National standards like TEC. This paper also highlights the advantages of incorporating EMC design rules in early stage of design, due to flexibility in choosing of components like filters, shields and protective devices to achieve cost-effective solution and avoiding field modification. A case study of telecom product, viz., (FRS) Fixed Remote Station of Wireless Local Loop (WLL) subsystem, used in subscriber premises for voice telephony and Internet connectivity is taken up for elucidating EMI problems encountered during the EMC certification process and the measures taken to mitigate the same. The experience gained during this FRS EMC compliance certification of the corDECT system will substantially reduce the cycle time in future products with better design margin. Emission and susceptibility requirements from Standard Institutes to meet the Regulatory Authorities are also outlined

A uniform laser energy control for ceramic sintering rapid prototyping - seminar topics,it seminar topics,latest seminar topics,seminar topics on computer science

A uniform laser energy control for ceramic sintering rapid prototyping

Abstract

The rapid-prototyping has become popular nowadays as the lifecycles of commercial and consumer products have been shorten to years or even months. The rapid prototyping technology provides a modern way to review the rapid change of the product has forced the designers and manufacturers to make new designs, jigs, tools, and molds for the products. Unlike the traditional machining of cutting material, the rapid prototyping utilize technologies, such as etching, laser, etc., to form the shapes of designed articles within limited time and cost. As cutting-through is prohibited, means to control the machining are required and important to the success of prototyping. This study has focused on the laser energy control for the ceramic rapid prototyping, which will sinter the ceramic powders into a solid object. A uniform laser energy controller is developed to improve the quality of the ceramic working piece. The developed method has been implemented and tested on a MCU and FPGA controller to demonstrate its applicability to ceramic sintering rapid prototyping.

A Tempest Fiber Optic Local Area Network Seminar Topic - seminar topics,it seminar topics,latest seminar topics,seminar topics on computer science

A Tempest Fiber Optic Local Area Network

Abstract

Local Area Networks (LANs) are coming to the forefront in data communications for both commercial as well as military applications. This thrust has resulted from the requirement to provide communications and resource sharing between dispersed users of computers and/or workstations. For many government/military applications, security is a key aspect. This paper describes a recently developed TEMPEST LAN which utilizes optical fiber as the communications medium along with LAN transceivers and communication servers designed to meet TEMPEST requirements. The LAN operates at 10 Mb/s using the Ethernet and IEEE 802.3 Standards.