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5.6 BW Limit
This series oscilloscope supports the bandwidth limit function. Setting the bandwidth
limit can reduce the noises in the displayed waveforms. For example, the signal under
test is a pulse with high frequency oscillation.
• When the bandwidth limit is disabled, the high frequency components of the
signal under test can pass the channel.
• When you enable the bandwidth limit and limit it to 20 MHz or 250 MHz, the
high frequency components found in the signal under test that are greater than
20 MHz or 250 MHz are attenuated.
Press to open the CH1 setting menu.Then, press BW Limit continuously or rotate
the multifunction knob to select the desired bandwidth limit. Press down the knob
to select it. By default, it is OFF. When the bandwidth limit is enabled, the character
"B" will be displayed in the channel status label at the bottom of the screen. You can
also enable the touch screen to select the desired BW limit.
The bandwidth limit that you select is based on the input impedance of the
oscilloscope, as shown in
Table 5.2 BW Limit
.
Table 5.2 BW Limit
Input Impedance of the Oscilloscope Available Bandwidth Limit
50 Ω 20 M
1 MΩ 20 MHz and 250 MHz
NOTE
Bandwidth limit can not only reduce the noise, but also can attenuate or eliminate the high
frequency components of the signal.
5.7 Probe Ratio
This series oscilloscope allows you to set the probe attenuation manually. To obtain
the correct measurement results, you must set the probe ratio properly. By default,
the probe ratio is 1X.
To Set the Vertical System
52
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