Keysight N5990A MIPI M-PHY Receiver Test User Guide 237PWM Tests 7ProcedureThe data generator sends Burst-mode CJTPAT signaling while the DUT isconfigured for Terminated-mode or Non-Terminated-mode depending onthe test case.In Compliance Mode, the data generator sets the calibrated differentialvoltage amplitude to the minimum (60mV for RT, 120mV for NT) andmaximum (245mV for RT, 490mV for NT) conformance values. Thecommon mode voltage is fixed to the nominal value (150mV) according tothe specification. No other signal impairments (ISI or jitter) are added. Ateach step the BER is measured and compared with the Target BER toconsider the pass/fail result.In Expert Mode, the differential voltage component of each Level Pair istested over the given Amplitude Range. In this case, the result will showthe minimum and maximum differential voltage values at which the DUTworks properly and the test will pass if those values are within the speclimits.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 according tothe CTS.Connection DiagramRefer to the connection diagrams shown in the Connection Diagramsection of the Test 2.1.1- HS-RX Differential Input Voltage Amplitude Testtest.ParametersThe parameters used in Expert Mode for this test, are as follows:• CDR Loop Bandwidth (if CDR is selected in the Special Parameterdialog, see “BERT Analyzer Settings”)• CDR Peaking (if CDR is select in Special Parameter dialog, see “BERTAnalyzer Settings”)• CDR Transition Density (if CDR is selected in the Special Parameterdialog, see “BERT Analyzer Settings”)• CDR Loop Order (if CDR is selected in the Special Parameter dialog,see “BERT Analyzer Settings”)• Target BER• IBerReader Init Mode• Test Sequence
