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Keysight 1000B Series Oscilloscopes User’s Guide
3
Capturing Data
Overview of Sampling
To understand the oscilloscope’s sampling and acquisition modes, it is helpful to
understand sampling theory, aliasing, oscilloscope bandwidth and sample rate,
oscilloscope rise time, oscilloscope bandwidth required, and how memory depth
affects sample rate.
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 have the
signal be uniquely reconstructed without aliasing.
f
MAX
= f
S
/2 = Nyquist frequency (f
N
) = folding frequency
Aliasing
Aliasing occurs when signals are under-sampled (f
S
< 2f
MAX
). Aliasing is the signal
distortion caused by low frequencies falsely reconstructed from an insufficient
number of sample points.
Summary of Contents for 1000B Series
Page 1: ...Keysight 1000B Series Oscilloscopes User s Guide ...
Page 12: ...12 Keysight 1000B Series Oscilloscopes User s Guide Contents ...
Page 16: ...16 Keysight 1000B Series Oscilloscopes User s Guide Tables ...
Page 36: ...36 Keysight 1000B Series Oscilloscopes User s Guide 1 Getting Started ...
Page 124: ...124 Keysight 1000B Series Oscilloscopes User s Guide 5 Saving Recalling and Printing Data ...
Page 138: ...138 Keysight 1000B Series Oscilloscopes User s Guide 6 Oscilloscope Utility Settings ...