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Overview
To understand the oscilloscope's sampling and acquisition modes, it is helpful to understand sampling
theory, sample rate, and oscilloscope bandwidth.
Sampling Theory
The Nyquist sampling theorem states that for a limited bandwidth (band-limited) signal with
maximum frequency f
MAX
, the equally spaced sampling frequency f
S
must be greater than twice the
maximum frequency f
MAX
, in order to uniquely reconstruct the signal without aliasing.
f
MAX
= f
S/2
= Nyquist frequency (f
N
) = folding frequency
Sample Rate
The maximum sample rate of the oscilloscope is 1GSa/s. The actual sample rate of the oscilloscope is
determined by the horizontal scale. Press
Horizontal Scale
to adjust the sample rate.
The actual sample rate is displayed in the information area at the bottom right of the screen.
The effects of low sampling rate on the waveform:
1.
Waveform Distortion:
when the sample rate is too low, some waveform details are lost and the
waveform displayed is quite different from the actual signal.
2.
Waveform Confusion (Aliasing):
when the sample rate is lower than twice the actual signal
frequency (Nyquist Frequency), the waveform frequency reconstructed from the sample data is
lower than the actual signal frequency. The most common aliasing is jitter on a fast-changing
edge.
Содержание OSC-9200
Страница 1: ...AEGIS Shaft Voltage Tester Handheld Digital Oscilloscope AEGIS OSC 9200...
Страница 18: ...3 Appearance and Dimensions mm Figure 1 Front View Figure 2 Side view...
Страница 44: ...29 Horizontal Control Contents u Horizontal Scale u Horizontal Delay u Roll Mode u Zoom Mode...
Страница 56: ...41 Figure 16 x Interpolation Figure 17 Sinx x Interpolation...
Страница 60: ...45 Figure 21 With Random Noise Normal Mode Figure 22 With Random Noise Average Mode...
Страница 101: ...86 l R W the type of a frame write or read l Data the value of the data Figure 42 I2C Decode List Display...
Страница 105: ...90...
Страница 116: ...101 l CRC the value of CRC Cyclic Redundancy Check field l ACK Acknowledgment bit Figure 57 CAN Decode List Displa...
Страница 135: ...120 Figure 75 Integral with Offset...
Страница 139: ...124 Figure 77 Measure Pulse Width...
Страница 146: ...131 Figure 83 Added the Measurement Note if the parameter does not match the measure condition it will display as...
Страница 190: ...175 DC Current Measurement AC Current Measurement...
Страница 204: ...info est aegis com www est aegis com...