Keysight N5990A MIPI M-PHY Receiver Test User Guide 253PWM Tests 7ProcedureThe data generator sends Burst-mode CJTPAT signaling while the DUT isconfigured for Terminated-mode. The differential voltage amplitude andthe common-mode are set to the nominal values (200mV). No other signalimpairments such as the ISI channel or the jitter sources are added to thesignal.A sweep of the calibrated Lane-to-Lane skew is done in the tested lane,starting with the Min Tested Value (minimum skew value) and increasingwith the given Step Size value until the Max Tested Value is reached. Ateach step the BER is measured and compared with the Target BER toconsider the pass/fail result.This test is performed at each selected lane and PWM gear and it is testedat the minimum and maximum data rate value for all gears.Connection DiagramRefer to the connection diagrams shown in the Connection Diagramsection of the Test 2.1.6-HS-RX Lane-to-Lane Skew Test test.ParametersThe parameters used in Expert Mode for this test, are as follows:• Level Pairs• CDR Loop Bandwidth (if CDR is selected in the Special Parameterdialog, see “BERT Analyzer Settings”)• CDR Peaking (if CDR is selected in the Special Parameter dialog, see“BERT Analyzer Settings”)• CDR Transition Density (if CDR is selected in the Special Parameterdialog, see “BERT Analyzer Settings”)• CDR Loop Order (if CDR is select in Special Parameter dialog, see“BERT Analyzer Settings”)• Target BER• IBerReader Init Mode• Test Sequence• Re-Init sequence after Reset DUT• Min Spec• Min. Tested Value• Max. Tested Value• Step Size
