40
Interpolation Method
Under real-time sampling, the oscilloscope acquires discrete sampled values of the waveform being
displayed. In general, a waveform of discrete dots is difficult to interpret. In order to increase the
clarity of the signal, digital oscilloscopes usually use interpolation to display a continuous waveform
rather than disconnected sample points.
Interpolation is a processing method to “fill the gaps” between sampled points. This oscilloscope
offers two algorithms for interpolation, which can be selected as follows.
Press
Acquire
on the front panel to enter the ACQUIRE Function menu; then press the
Interpolation
F key to select
Sinx/x
or
X
.
l
X
(Figure 16)
:
In the adjacent sample points are directly connected on a straight line. This
method is confined to rebuilding on the edge of signals, such as a square wave.
l
Sinx/x
(Figure 17)
:
Connecting the sampling points with curves is more versatile. Sinx
interpolation uses mathematical processing to calculate results in the actual sample interval.
This method bends the signal waveform, and makes it produce a more realistic regular shape than
pure square waves or pulses. When the sampling frequency is 3 to 5 times the bandwidth
frequency of the system, the Sinx/x interpolation method is recommended.
Figure 15 Display Type Set to Dots
Summary of Contents for OSC-9200
Page 1: ...AEGIS Shaft Voltage Tester Handheld Digital Oscilloscope AEGIS OSC 9200...
Page 18: ...3 Appearance and Dimensions mm Figure 1 Front View Figure 2 Side view...
Page 44: ...29 Horizontal Control Contents u Horizontal Scale u Horizontal Delay u Roll Mode u Zoom Mode...
Page 56: ...41 Figure 16 x Interpolation Figure 17 Sinx x Interpolation...
Page 60: ...45 Figure 21 With Random Noise Normal Mode Figure 22 With Random Noise Average Mode...
Page 105: ...90...
Page 135: ...120 Figure 75 Integral with Offset...
Page 139: ...124 Figure 77 Measure Pulse Width...
Page 190: ...175 DC Current Measurement AC Current Measurement...
