Keysight Technologies N5991ST3A SATA, Руководство пользователя

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70 Keysight N5991 SATA Test Automation Software Platform User Guide
5 Receiver Tests
Rcvr Sensitivity Test
This test is available for all data rates.
Purpose and Method
This Rcvr Sensitivity Test characterizes the minimum differential voltage at
which the DUT can still work.
This method starts with the value Start Voltage and steps down linearly
with Voltage Step Size value until either an error is found or the Stop
Voltage value is reached without an error. The minimum passed value is
the final test point that did not return an error.
Connection Diagram
Refer to Figure 20 (M8020A) and Figure 21 (M8040A)
Parameters in Expert Mode
• Number of Allowed Frame Errors: This is the number of frame errors
that are allowed. The default value is '0'.
• Number of Frames: The number of frames used for frame error
measurement.
• Start Voltage: The value at which the test starts with initial calibrated
eye opening at TP2.
• Stop Voltage: The last calibrated eye opening at TP2.
• Voltage Step Size: The amount the calibrated eye opening at TP2 is
changed from step to step.
Data Generator
• Random Jitter (RJ): The amount of calibrated RJ added to the signal.
• SJ Frequency: The frequency of the calibrated SJ added to the signal.
• Sinusoidal Jitter (SJ): The amount of calibrated SJ added to the signal.
• Data Rate Deviation: A fixed deviation from the nominal data rate.
• SSC Deviation: Maximum amount of deviation from the nominal data
rate due to down-spread SSC modulation.
• SSC Frequency: The frequency of the SSC modulation.