Keysight Technologies N5991ST3A SATA, Руководство пользователя

Страница: 39 / 82

Keysight N5991 SATA Test Automation Software Platform User Guide 39
SATA Calibrations 4
Sinusoidal Jitter Calibration Test
The Sinusoidal Jitter Calibration procedure is available for all data rates.
Purpose and Method
The purpose of this procedure is to calibrate the sinusoidal jitter.
The pattern generator sends the mid-frequency test pattern (MFTP) to the
oscilloscope then the SJ value is added to the data signal. The procedure
sets seven SJ frequency points between 0 MHz and the value of Max Jitter
Frequency, and also sets a few SJ values starting from 0 mUI and
increasing linearly using the value of Jitter Step Size until the Stop Jitter
value is reached. At each sinusoidal jitter frequency point, the actual SJ
values are measured according to the set SJ values with the
RJ/DJ-separation software (EZJIT Plus Software) on the oscilloscope and
the set and measured jitter values are stored separately before the value of
set jitter is increased for the next step.
Connection Diagram
Same as for Random Jitter Calibration (see Figure 13 and Figure 14 )
Parameters in Expert Mode
• Transitions: The number of transitions (0 to 1 or 1 to 0) used for the
jitter measurement.
• Stop Jitter: The final jitter value for the calibration procedure.
• Jitter Step Size: The difference value of set jitter between two jitter
measurements.
• Max Jitter Frequency: The highest frequency that is calibrated.
• Random Jitter: The amount of random jitter used for this calibration.
This value stays the same for all steps.
Dependencies
None