Keysight N5991 SATA Test Automation Software Platform User Guide
41
SATA Calibrations
4
Differential Voltage Calibration Test
The Differential Voltage Calibration procedure is available for all data
rates.
Purpose and Method
The purpose of this procedure is to calibrate the differential amplitude of
the signal.
The basic principle of this procedure is that the pattern generator sends a
pattern to the real-time oscilloscope. Then it sets the default value as the
first differential voltage value and increases this linearly with a step size
value. At each step, the oscilloscope measures the actual differential
voltage values for the corresponding set differential voltage values.
Pattern
The Framed COMP pattern uses a lone bit pattern (LBP). This pattern
contains the following:
1 Five ‘0’s followed by one ‘1’ (1000001, lone ‘1’)
2 Five ‘1’s followed by one ‘0’ (0111110, lone ‘0’)
The lone bit has the lowest differential amplitude that can occur during the
transmission of valid 10-bit SATA symbols. For the calibration procedure,
either the full Framed COMP pattern or the LBP can be used.
Signal stress
The calibration can be done with or without inter-symbol interference (ISI),
RJ, and SJ.
Measurement method
• Fixed length eye opening: The inner eye height is measured over
5 E-6 UI.
Содержание N5991ST3A SATA
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Страница 82: ...This information is subject to change without notice Keysight Technologies 2021 Edition 2 0 October 2021...