Keysight N5990A MIPI M-PHY Receiver Test User Guide 245PWM Tests 7ProcedureThe data generator sends Burst-mode CJTPAT signaling with nominalamplitude settings while the DUT is configured for Terminated-mode.Then, the TTERM-ON-PWM-RX (PWM-RX Differential Termination EnableTime) is measured using a real-time oscilloscope. Among all measuredTTERM-ON-PWM-RX values, the maximum and minimum TTERM-ON-PWM-RXvalues are considered as the final results.The test will pass if the maximum TTERM-ON-PWM-RX value is less than thePREPARE time defined by the DUT´s LS_PREPARE_Length_Capabilityattribute (see Table 42).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.Table 42 PWM-Prepare Length ValuesConnection DiagramRefer to the connection diagrams shown in the Connection Diagramsection of the Test 2.1.4-HS-RX Differential Termination Enable Time testParametersThe 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 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 selected in the Special Parameter dialog,see “BERT Analyzer Settings”)• Lane Under Test Termination Mode• Semi Automated Test• Set Single Ended Amplitude• Set OffsetParameter Name Parameter Value Parameter UnitLS_PREPARE_LENGTH 0 to 15 N/aT PWM-PREPARE TPWM-PREPARE = Max(2(LS_PREPARE_LENGTH+GEAR-7) , 1)SI
