Chapter 3 Horizontal System Setting RIGOL
DS4000E User’s Guide 3-7
4. According to the phase deviation measurement principle diagram and the
measurement result in the figure above, it can be calculated that
.
Therefore, the phase deviation angle
.
Note: The maximum sample rate of the oscilloscope in the X-Y mode is 2.0 GSa/s.
Generally, longer sample waveform ensures better figure; but, as being limited by
the memory depth, longer waveform will require a reduction in the sample rate
(please refer to “To Set the Memory Depth
”). Therefore, in this measurement
process, reducing the sample rate appropriately can improve the displayed Lissajous
figure.
Method 2: Use the one-key measurement function of the oscilloscope
Please measure the phase deviation between the input waveforms of CH1 and CH2
using the one-key measurement function by referring to “To Make One-key
Measurement”.
Roll Mode
In this mode, the waveform scrolls from the right to the left. The adjustable range of
the horizontal time base is from 200.0 ms/div to 1.000 ks/div. The horizontal time
base will be set to 200.0 ms/div automatically when you turn on the “Roll” mode.
In this mode, the “To Adjust the Horizontal Position”, “To Turn Delayed
Sweep On/Off”, “Trigger”, “To Specify the Measurement Range”, “Protocol
Decoding”, “Pass/Fail Test”, “Waveform Recording” and “To Set the
Persistence Time” are not available.
If the delayed sweep function is enabled, when the “Roll” mode is enabled, the
delayed sweep function will be disabled automatically; when the “Y-T” mode is
enabled again, the delayed sweep function will be enabled automatically.
Note: Please pay attention to distinguish the Roll mode from “Slow Sweep Mode”.
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