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SIGLENT
SDS2000X User Manual 193
Transient
The transient response analysis measures how fast the output of a power supply
responds to the change at the output load. This time is from when the output voltage first
exits the setting band to when it last enters the setting band.
1. Press the Utility button on the front panel to enter the UTILITY function menu.
2. Press the Next Page softkey to enter the second page of the UTILITY function menu.
3. Press the Power Analyze softkey to enter the ANALYSIS function menu.
4. Press the Analysis softkey, and then turn the universal knob to select Transient and
press down the knob to confirm.
Figure 128: Transient ANALYSIS Function Menu
5. Connect the probes to the device-under-test and to the oscilloscope as well.
a. Select the proper attenuation ratio for the probes.
b. Connect the voltage probe (passive or differential) to the DC output of the power
supply.
c. Connect the voltage probe to an oscilloscope input channel.
d. Connect the current probe to the output load of the power supply.
The change in the load current will be used to trigger the oscilloscope to capture
the transients.
e. Connect the current probe to an oscilloscope input channel.
6. Press the Signal softkey to enter the SIGNAL menu.
Figure 129: Transient SIGNAL Menu
7. Press the Voltage and Current softkeys and then turn the universal knob to select the
channels.
8. Make sure the proper probe attenuation factors are set in the oscilloscope for the
voltage and current probes.
9. Press the Duration softkey, and then turn the universal knob to set the time duration
to capture signals. This sets the time/div of the oscilloscope.
10. Press the Over Shoot softkey, and then turn the universal knob to specify the % of
overshoot of the output voltage.
This value is used to determine the setting band value for the transient response and
adjust the vertical scale of the oscilloscope.
11. Press the Steady Vout softkey, and then turn the universal knob to specify the
expected steady state output DC voltage of the power supply.
This value is used to along with the overshoot percentage specify the setting band for
the transient response and to adjust the vertical scale of the oscilloscope.
12. Return to the ANALYSIS function menu.
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