Avago Optical Module Test

Avago optical modules, including SFP and SFP+ transceivers, are tested using dedicated evaluation boards and standardized electro-optical and digital diagnostic procedures.Evaluation BoardsAvago provides SFP and SFP+ evaluation boards such as the AFCT-5016Z, AFBR-700SDZ, and AFBR-57D5APZ, designed to facilitate testing of fiber optic transceivers compliant with MSA standards like SFF-8074i, SFF-8472, and SFF-8431/8432 . These boards include a printed circuit board (PCB) with clearly labeled connections, jumpers, and DIP switches to configure the module for testing . The SFP+ module plugs into a 20-pin connector on the board, allowing access to transmitter and receiver signals, power supply, and digital diagnostic interfaces .Test EquipmentTo perform a complete evaluation, the following equipment is typically required:DC power supply (3.3V) for module operation Fiber optic cables for signal transmissionDigital Communication Analyzer (DCA) such as 86100C with plug-ins 86105C or 86112A for eye diagram and signal integrity measurementsError Performance Analyzer and Pattern Generator (e.g., 70843B) to test bit error ratesFiber optic attenuators to simulate link lossEEPROM reader (i-Port or similar) to access digital diagnostic monitoring (DDM) data Test ProceduresElectro-Optical TestingConnect the SFP/SFP+ module to the evaluation board and power it with 3.3V supply .Use fiber optic cables to connect the transmitter and receiver to the DCA and error analyzer.Measure key parameters such as optical output power, receiver sensitivity, extinction ratio, and eye diagram quality .Apply attenuators to simulate different link conditions and verify module performance over the expected range.Digital Diagnostic Monitoring (DDM)Access the module's EEPROM via the I²C interface (SCL and SDA lines) on the evaluation board .Read parameters such as temperature, supply voltage, laser bias current, and optical power.Verify that the module reports accurate values and responds correctly to digital interface commands.Configuration and SafetyUse DIP switches and jumpers to enable or disable transmitter output or configure address lines for DDM .Ensure proper grounding and observe ESD precautions to prevent damage to sensitive optical components.SummaryTesting Avago optical modules involves a combination of hardware evaluation boards, electro-optical measurements, and digital diagnostics. Using the recommended equipment and following standardized procedures ensures accurate characterization of module performance, compliance with MSA standards, and reliable operation in network environments .