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Chapter 4 To Set the Sample System
much smoother waveform on the screen and improves the vertical resolution. This is
generally used when the sample rate of the digital converter is greater than the
storage rate of the acquisition memory.
Note:
The "Average" and "High Res" modes use different averaging methods. The
⚫
former uses "Multi-sample Average" and the latter uses "Single-sample
Average".
In "High Res" mode, the oscilloscope improves the measurement accuracy at
⚫
the cost of bandwidth. Each time the sampling rate changes, a window
displaying the current bandwidth appears at the lower-left corner of the screen.
In "High Res" mode, the highest waveform refresh rate mode is not supported.
⚫
Sampling Mode
This oscilloscope only supports the real-time sampling mode. In this mode, the
oscilloscope produce the waveform display from samples collected during one trigger
event. The highest real-time sample rate on the analog channel of MSO8000 series is
10 GSa/s. The current sample rate is displayed under CH SampleRate.
Tip
Press RUN/STOP on the front panel to stop sampling, and then the oscilloscope
will maintain its last captured graph. You can still expand or zoom the waveforms
by using the horizontal and vertical control knobs.
Sample Rate
Sampling is the process of converting the analog signal into the digital signal at a
specified time interval and then restoring them in sequence. The sample rate is the
reciprocal of the time interval.
The sample rate of the analog channel is related to the current channel mode. The
maximum real-time sample rate in the single-channel mode of the oscilloscope is 10
GSa/s. The maximum real-time sample rate in the dual-channel mode is 5 GSa/s, and
the maximum real-time sample rate in the 4-channel mode is 2.5 GSa/s.
Tip
Single-channel mode: only one of the four channels (CH1/CH2/CH3/CH4) is
enabled.
Dual-channel mode: either CH1 or CH2 is enabled; and either CH3 or CH4 is
enabled.
4-channel mode: CH1/CH2 are both enabled or CH3/CH4 are both enabled.
MSO8000 User Guide
RIGOL
4-7
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