Tektronix MSO64 — анализ частотной характеристики и измерения в контроллерах [222/628]

Tektronix MSO44 [222/628] The dpm tab requires option sup5 dpm sup6 dpm
Frequency Response Analysis Measurements panel (Requires option SUP4-PWR, SUP5-PWR, SUP6-PWR).
Measurement Description
Control Loop Response Plots the gain as 20 log (V
out
/V
in
) and phase difference between V
in
and V
out
at each
frequency within the swept band. The resulting plot is commonly referred to as a
Bode Plot.
Power Supply Rejection Ratio Measures both the modulated input and output AC voltage levels and plots the
rejection ratio as 20 log (V
in
/V
out
) at each frequency within the specified band.
Impedance Computes and plots the channel ratio (V
out
/V
in
) at each frequency within the swept
band.
The impedance curve displays maximum annotations of 3 peaks, if they are available
only.
NOTE. It is recommended to use a splitter with the built-in AFG source for
Impedance measurements. If you use an external AFG, use a single channel with a
splitter.
See also. Power measurement configuration menu overview (Requires option 5-PWR, 6-PWR) on page 209
The DPM tab (Requires option SUP5-DPM, SUP6-DPM)
The DPM tab lists the DPM-related (Digital Power Management) measurements that you can add to the Results bar. DPM
measurements include ripple analysis, transient analysis and power sequence analysis. The DPM tab is shown only if you have
purchased and installed the DPM option.
Power rail probes are recommended for ripple, overshoot, and undershoot measurements. For turn on time and turn off time
measurements, optional to use passive probe at the input voltage and recommended to power rail probes at the output side. The
power rail probe is recommended because it takes care of the DC rail output voltage offset and measurement results will be
precise.
To open the DPM Measurements tab:
1. Tap the Add New...Measure button.
2. Tap the DPM tab.
To add a measurement to the Results bar:
1. Tap a measurement panel:
Ripple Analysis Measurements panel (Requires option SUP5-DPM, SUP6-DPM) on page 193
Transient Analysis Measurements panel (Requires option SUP5-DPM, SUP6-DPM) on page 193
Power Sequence Analysis Measurements panel (Requires option SUP5-DPM, SUP6-DPM) on page 193
2. Select the measurement.
3. Select the number of rails in the Power Rails field.
4. Tap Add. You can also double-tap a measurement to add it to the Results bar.
Menus and dialog boxes
192 4/5/6 Series MSO Help

Содержание

Изучите методы анализа частотной характеристики, включая Bode Plot, коэффициент подавления и импеданс. Узнайте о DPM измерениях и их настройках.

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