Project Analog - March 2008 - (Page 23)

all required test cases, that each test will pass on at least there different vendors’ mobile stations, and that the implementation will stand up-to scrutiny when compared with the TSS&TP. For PCT Agilent, Anite and AT4/Aeroflex are active members of the validation process and at the time of writing the validation process is still in progress. wimax pCt Figure 2 shows a schematic diagram for the Agilent N6430A WiMAX PCT test system. The architecture for the system is based around a TTCN-3 (Testing and Test Control Notation, version 3) test methodology. TTCN originally stood for Tree and Tabular Combined Notation and was developed as a language designed for testing digital systems. An earlier version of TTCN is used for protocol signalling conformance tests for 3G cellular technologies. TTCN-3 standardization has been led by ETSI and provides some significant benefits. In particular TTCN-3 provides a defined layer of abstraction between the TTCN-3 test environment and the hardware used to provide the “real world” test system. In theory this allows PCT users to develop TTCN-3 scripts, according to a TRI (TTCN-3 Run-time interface) interface, which will then be supported by each of the PCT hardware vendors, independent of their specific implementation. The TRI interface defines the commands available within the TTCN-3 scripting environment. This interface consists of the definition of a number of ports, which are connected to the System Adaptor (SA). These ports allow the sending and receiving of WiMAX messages using standard commands defined within the ETSI TRI specification. In addition a series of WiMAX specific external functions are also defined and made available to the script developer. The external functions communicate with the platform adaptor and provide a means of both controlling the test system and providing a notion of time throughout the test system. The system and platform adaptors are developed by the test vendor. These connect the TRI interface with the physical hardware and provide a mapping between the commands available at the TRI interface and the specific requirements of the hardware used in the system. Finally the codec provides the software representation of the coding and decoding associated with the functionally of the digital system under test. In the case of PCT the codec is able to de-code and encode the required TLV (Type. Length, Value) commands supported by the 802.16-2004 cor2/d3 Mobile WiMAX Specification. The TRI interface and codec information provides the necessary information to support the developer in writing TTCN-3 scripts for the purpose of Mobile WiMAX testing. Agilent offers focused solutions meeting the needs of both users wishing to perform conformance based testing using ETSI scripts, and those needing to develop scripts to support their own test coverage needs. For more on products for mobile WiMAX, visit www. electronicproducts.com/linear.asp. Contents Viewpoint Wireless Communication Using IrDA® Wireless Design Choices Advanced Communication Solutions for Lighting Analog news cases works in accordance with the test description in the TSS&TP. To do this, a validation lab has been established at AT4 in Malaga, Spain. There instrument vendors are working alongside equipment vendors to perform testing in preparation for validation. For wave 1 Mobile WiMAX, the TTA (Telecommunications Technology Association, in Korea) has been selected as the organisation responsible for overseeing this testing. The requirements for a vendor achieving validated status are that their instrument must support 23 · ProjeCt ANALog · mAr 08 Microchip analog page Interface products overview Sample center microchipDIRECT Reference designs/ app notes Technical training • http://www.microchip.com http://www.microchip.com/analog http://www.microchip.com/analog http://www.microchip.com/interface http://www.microchip.com/interface http://sample.microchip.com/Default.aspx?testCookies=true http://www.microchipdirect.com/catalogselection.aspx?returnURL=default.aspx http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=1469&filter1=function&redirects=appnotes http://www.electronicproducts.com/linear.asp http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=1469&filter1=function&redirects=appnotes http://www.electronicproducts.com/linear.asp http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=1423

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Project Analog - March 2008 Contents Viewpoint About Project Analog Sponsor Wireless Communication Using the IrDA® Standard Protocol Wireless Design Choices Advanced Communication Solutions for Lighting Putting 10-GbE PHY Options Into Perspective Ease Into the Flexible CANbus Network Technology and Drivers for Mobile WiMAX Analog News—Analog News from Multiple Sources Enter to Win an iPhone Contact Project Analog Sponsor Treelink Microchip Advanced Parts Selector (MAPS)

Project Analog - March 2008

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