Keysight Technologies N5990A, User Manual

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Keysight N5990A MIPI M-PHY Receiver Test User Guide 237
PWM Tests 7
Procedure
The data generator sends Burst-mode CJTPAT signaling while the DUT is
configured for Terminated-mode or Non-Terminated-mode depending on
the test case.
In Compliance Mode , the data generator sets the calibrated differential
voltage amplitude to the minimum (60mV for RT, 120mV for NT) and
maximum (245mV for RT, 490mV for NT) conformance values. The
common mode voltage is fixed to the nominal value (150mV) according to
the specification. No other signal impairments (ISI or jitter) are added. At
each step the BER is measured and compared with the Target BER to
consider the pass/fail result.
In Expert Mode , the differential voltage component of each Level Pair is
tested over the given Amplitude Range. In this case, the result will show
the minimum and maximum differential voltage values at which the DUT
works properly and the test will pass if those values are within the spec
limits.
This test is performed at each selected lane and PWM gear and it is tested
at the minimum and maximum data rate value for all gears according to
the CTS.
Connection Diagram
Refer to the connection diagrams shown in the Connection Diagram
section of the Test 2.1.1- HS-RX Differential Input Voltage Amplitude Test
test.
Parameters
The parameters used in Expert Mode for this test, are as follows:
• CDR Loop Bandwidth (if CDR is selected in the Special Parameter
dialog, see “BERT Analyzer Settings” )
• CDR Peaking (if CDR is select in Special Parameter dialog, see “BERT
Analyzer Settings” )
• CDR Transition Density (if CDR is selected in the Special Parameter
dialog, 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