Chapter 11 Sampling System
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4)
Use the zoom mode to represent the characteristics of burr:
a.
Tap the “Zoom” button in the main menu to open the zoom window.
b.
To get a better resolution of burr, expand the time base to set the expanded portion of the normal window
view around burr.
11.4 Record Length and Sampling Rate
The record length is the data volume for each captured waveform. For example, if the record length is 700K, it
means that 700K sample points are captured by one trigger.
In the main menu, tap
to enter the record length setting menu, which can be set by tapping the
corresponding record length.
Figure 11-8 Record Length
In normal refresh mode, if it is a single channel, the record length can be set to 14k, 140k, 1.4M, 14M, 28M, Auto;
if it is dual channel, the record length can be set to 7k, 70k, 0.7M, 7M, 14M, Auto; if it is three or four channels, the
record length can be set to 3.5k, 35k, 0.35M, 3.5M, 7M, Auto.
Record length and Sampling rate
The record length is data volume collected per waveform capture. For example, if the record length is 0.7M, it
means that 700K sample points are captured by one trigger.
The oscilloscope record length and sampling rate have the following relationship:
Sampling rate = Record length/Acquisition time
Generally, the oscilloscope acquisition time is exactly the display time on the current entire screen (current
horizontal time base×14).
For example, if the oscilloscope has the memory depth of 700K, the sampling rate of 1GSa/s, and the horizontal
time base of 50us/div, the acquisition time is 700us, which is 50us/div×14div.
However, when the fast time base (below 20 ns) or the record length is set to a fixed value, the oscilloscope
acquisition time does not necessarily represent the display time on the current entire screen.
For example, if the oscilloscope has the memory depth of 700K, the sampling rate of 1GSa/s, and the horizontal
time base of 20ns, the acquisition time is 700ns, which is 2.5 times of the current display time on the entire screen.
Or, if the memory depth is 140K (fixed value), the sampling rate is 1GSa/s, and the horizontal time base is 1us, the
acquisition time is 140us, which is 10 times of the current display time on the entire screen.
Summary of Contents for ATO1000 Series
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