Konstruktion och byggnation av testfixtur för 10Gbit/s transpondermoduler

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This thesis for the Master of Science degree was performed at Solectron Corporation in Norrköping. The background for the thesis was a need to develop and build two test fixtures to automatize testing and adjusting of transmitter modules (TX-fixture) and receiver modules (RX-fixture) which are head devices in DWDM-systems. The basic elements for the test fixtures are: Test board, switch board and DC/DC board. The main function of the test board is to handle communication between the transmitter and receiver modules and supply voltage to these modules. The test board was insufficient and modified with a microprocessor to handle the communication between the PC and the receiver module. There are two connectors (NexLev) on test board to connect the receiver and transmitter modules. The switchboard has been used in fixtures for testing and adjusting both the receiver and transmitter modules for data rate up to 2.5 Gbit/s. This board has been modified for use in new fixtures for data rate up to 10Gbit/s. Because the power consumption of the test module will be measured with the amperemeter in the power supply, the reference module and the test module cannot be supplied by the same power supply. Because of high cost and the fact that no current is measured it is unacceptable to use a power supply to feed the reference module. The solution is to build a DC/DC board. Because the NexLev connector has a durability of 30-40 times it was necessary to have a connector with higher durability. This connector is located between the test board and the test module. Without this connector the project will not be profitable for the company. S...