Keysight Technologies N5990A, User Manual

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Keysight N5990A MIPI M-PHY Receiver Test User Guide 249
PWM Tests 7
Procedure
The data generator sends Burst-mode CJTPAT signaling with nominal
amplitude settings while the DUT is configured for Terminated-mode.
Then, the T
TERM-OFF-PWM-RX
(PWM-RX differential termination disable
time) is measured using a real time oscilloscope. Among all measured
T
TERM-OFF-PWM-RX
values, the maximum and minimum T
TERM-OFF-PWM-RX
values are considered as the final results.
The test will pass if the maximum T
TERM-OFF-PWM-RX
value measured is
less than the time defined by the DUT's Sleep Time capability attribute.
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.
Connection Diagram
Refer to the connection diagrams shown in the Connection Diagram
section of the Test 2.1.4-HS-RX Differential Termination Enable Time 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 selected in the 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” )
• Lane Under Test Termination Mode
• Semi Automated Test
• Set Single Ended Amplitude
• Set Offset
• Prepare Length
• Sleep Length [UI]
• Sleep Time Capability [SI]
• IBerReader Init Mode
These parameters are listed in alphabetical order in Table 6 .