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7
Setting Measurement Conditions
7
Click the
[Realtime save]
button to set it to
[On]
.
The instrument can record data in the built-in SSD and a storage device while measuring waveforms.
Refer to “Real-time save” (p. 88).
8
Configure the overlaying setting.
Refer to “3.1 Overlaying New Waveforms With Previously Acquired Waveforms” (p. 36).
9
Configuring the memory division settings
Refer to “Memory Dividing Function” (p. 173).
Sampling rate setting guideline
Choose a sampling rate using the following table as a guideline.
Maximum display
frequency
Sampling rate
Maximum display
frequency
Sampling rate
800 kHz
20 MS/s
80 Hz
2 kS/s
400 kHz
10 MS/s
40 Hz
1 kS/s
200 kHz
5 MS/s
20 Hz
500 S/s
80 kHz
2 MS/s
8 Hz
200 S/s
40 kHz
1 MS/s
4 Hz
100 S/s
20 kHz
500 kS/s
2 Hz
50 S/s
8 kHz
200 kS/s
0.8 Hz
20 S/s
4 kHz
100 kS/s
0.4 Hz
10 S/s
2 kHz
50 kS/s
0.2 Hz
5 S/s
800 Hz
20 kS/s
0.08 Hz
2 S/s
400 Hz
10 kS/s
0.04 Hz
1 S/s
200 Hz
5 kS/s
If the instrument plots false waveforms (aliasing)
If a measured signal oscillates at a higher frequency compared to the sampling rate you choose,
the instrument may plot a false waveform oscillating at a frequency lower than that of the actual
signal once the signal frequency reaches a certain level. This phenomenon is called aliasing.
Actual input
signal
Sampling interval:
Sampled points
Observed
waveform
A sampling interval longer than the cycle of the
input signal causes aliasing.
To plot a sign wave that allows you to observe the peaks without any aliasing, the instrument needs
to sample the waveform at a minimum of 25 points per cycle.
1
Measurement Method
Summary of Contents for MR8740-50
Page 2: ......
Page 6: ...Contents iv...
Page 40: ...34 Enlarging a Part of the Waveform Zoom Function...
Page 86: ...80 Configuring Generator Module Specific Settings...
Page 128: ...122 Automatically Specifying the Trigger Level Auto trigger Level...
Page 164: ...158 Numerical Calculation Types and Descriptions...
Page 182: ...176 Displaying Waveforms...
Page 186: ...180...
Page 214: ...208 Operating the Instrument With a Browser Installed in a Computer...
Page 224: ...218 External Sampling EXT SMPL...
Page 232: ...226 Information for Reference Purposes...
Page 236: ...230 Index...
Page 237: ......
Page 238: ......