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AFBR-775BEZ Datasheet(PDF) 6 Page - AVAGO TECHNOLOGIES LIMITED |
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AFBR-775BEZ Datasheet(HTML) 6 Page - AVAGO TECHNOLOGIES LIMITED |
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6 / 48 page  6 R eference C hannel P attern G enerator B E R T TP 1 TJ r D J r W orst C ase Transm itter M in O M A M in C enter W avelength M ax S pectral R M S W idth M ax R IN 12 O M A M ax R ise & Fall Tim es W orst C ase C able P lant Fiber Type M ax Length M ax C onnector Loss M ax M odal N oise P enalty W orst C ase R eceiver M ax S ensitivity M in B andwidth TP 4 TJ r R eference C hannel for Tx D U T (Tx Test C hannel) P attern G enerator B E R T TP 1 TJ t D J t Transm itter U nder Test Test C able P lant Test Fiber Type Test Length A ttenuator Test R eceiver Test S ensitivity Test B andwidth TP 4 TJ t Reference Channel Pattern Generator BERT TP1 TJ r DJ r Worst Case Transmitter Min OMA Min Center Wavelength Max Spectral RMS Width Max RIN 12 OMA Max Rise & Fall Times Worst Case Cable Plant Fiber Type Max Length Max Connector Loss Max Modal Noise Penalty Worst Case Receiver Max Sensitivity Min Bandwidth TP4 TJ r Reference Channel for Rx DUT (Tx Test Channel) Pattern Generator BERT TP1 TJ t DJ t Test Transmitter Test OMA Test Center Wavelength Test Spectral RMS Width Test RIN 12 OMA Test Rise & Fall Times Test Cable Plant Test Fiber Type Test Length Attenuator Receiver Under Test TP4 TJ t Figure 7. Reference and Test Channels for Transmitter Figure 8. Reference and Test Channels for Receiver The reference model for testing transmitters consists of a pattern generator, fiber optic test cable, attenuator, test receiver and BERT. See Figure 7 for the evolution of a reference channel to a transmitter test channel. Dif- ferences between the worst case values for attributes in the reference model and those in the test equipment set can be compensated by an added attenuator (note that the 10GbE model translates all impairments into power penalties) and adjustments in TJ criteria at TP4. Differ- ences in the TP1 input jitter between the defined condi- tions, TJ r and DJ r, for the reference channel and actually provided in the test channel, TJ t and DJ t, can also be accommodated by adjustments to TP4 test criteria (TJ r becomes TJ t). The extended 10GbE Link model is used to determine the compensating attenuation and TP4 criteria adjustments. The reference for testing receivers consists of a pattern generator, test transmitter, fiber optic test cable, attenua- tor and BERT. See Figure 8 for the evolution of a reference channel to a receiver test channel. In a similar manner as with the transmitter, all differences between the test equipment and worst case channel are compensated with an attenuator and adjustments in the TP4 criteria. Informative TX parameters trading off each other while guar- anteeing TP2 & TP4 performance Parameter Symbol Extinction Ratio ER Output Optical Modulation Amplitude OMA Output Rise/Fall Time Relative Intensity Noise OMA RIN12OMA Accumulated Deterministic Jitter Accumulated Total Jitter Informative RX parameters trading off each other while guar- anteeing TP4 performance Parameter Symbol Receiver Bandwidth (BW) Input Optical Power Sensitivity (OMA) |
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Similar Description - AFBR-775BEZ |
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