Keysight N5990A MIPI M-PHY Receiver Test User Guide 227Squelch Tests 6When using loopback, the hibernate state exit is found by detecting thatthe DUT has activated the loopback mode and sent the test pattern backvia the TX. The test pattern must contain a configuration block startingwith the macros SQUELCH().When using UniPro Test Mode, it is observed that the DUT gets into TestMode and starts sending FILLER symbols back.The DUT should not exit the hibernate as long as the pulse width is lessthan the squelch detection limit (TPULSE-SQ = 20ns) in order to beconsidered conformant.Connection DiagramRefer to the connection diagrams shown in the Connection Diagramsection of the Test 2.4.3-SQ-RX Squelch Exit Voltage (VSQ) test.ParametersThe parameters used in Expert Mode for this test, are as follows:• Data Rate• 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”)• Target BER• IBerReader Init Mode• Squelch Test Sequence• Re-Init sequence after Reset DUT• Min Value• Max Value• Step Size• Set Single Ended Amplitude• Tested Offsets• Number of Pulses• Pulse DistanceThese parameters are listed in alphabetical order in Table 6.
