Eye Width, Eye Height and Eye Linearity Sample Clauses

Eye Width, Eye Height and Eye Linearity a The waveform is observed through a fourth-order ▇▇▇▇▇▇-▇▇▇▇▇▇▇ filter response with a bandwidth of 40 GHz. b Capture the differential signal at TP4 with an oscilloscope triggered with a clock from a reference CRU by applying a first-order transfer function and a 3 dB tracking bandwidth of fb/6640. c Set the oscilloscope to operate in jitter/noise mode. Set the measurement probability to 10-6. d A reference receiver with a CTLE is used to measure the eye width and eye height. Add a linearity test. e For the near-end compliance test, the CTLE peaking in the reference receiver shall be set at 1dB, 1.5dB, or 2dB. Any CTLE setting that meets both the EH6 and EW6 settings defined for TP4 in Table 6-1 is acceptable. f For the far-end compliance test, the signal measured at TP4 is first convolved with an emulated loss lane (around 7 dB loss at fb/2) that represents the worst-case lane loss. The CTLE peaking in the reference receiver shall be set from 1dB to 9dB. Any CTLE setting that meets both the EH6 and EW6 requirements defined for far-end TP4 in Table 6-1 is acceptable. g Measure the ‘eye width’, ‘eye height’ and ‘eye linearity’ on the oscilloscope. h For a 400G optical module, repeat the test for other lanes.