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SDS6000L User Manual
2 4 4 i n t . s i g l e n t . c o m
Connection Guide
Click Signal > Connection Guide to recall the connection guide of transient response, as shown
in the figure below. Please follow the instructions in this figure for connection. Click the icon on the top
right of the guide to close.
26.11 PSRR
The power supply rejection ratio (PSRR) test is used to determine how the regulator suppresses ripple
noise in different frequency ranges. The oscilloscope controls the arbitrary waveform/function
generator to output a sweep signal, which is used to introduce ripple into the DC voltage transmitted
to the voltage regulator. Measure the AC RMS ratio of input to output, and plot the relationship between
the ratio and frequency. The background noise of the oscilloscope is higher than that of the network
analyzer, and the sensitivity is lower than that of the network analyzer, so the PSRR measured by the
oscilloscope is difficult to exceed -60 dB. The PSRR test is generally acceptable for sampling the
overall PSRR behavior of the power supply under test.
The configuration of PSRR is the same as that of the Bode plot, see the chapter "Bode Plot" for details.
Connection Guide
Click Signal > Connection Guide to recall the connection guide of PSRR, as shown in the figure
below. Please follow the instructions in this figure for connection. Click the icon on the top right of the
guide to close.
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