Rigol DS1000E Series User Manual

RIGOL
© 2008 RIGOL Technologies, Inc.
User’s Guide for DS1000E, DS1000D Series
3-4
Example 4: To Reduce the Random Noise on a Signal
If the signal is noisy (Figure 3- 2), set up the oscilloscope to reduce the noise on the
waveform and avoid its interference to the signal.
Figure 3- 2
Signal with noise
1. Set the probe and the channel attenuations to 10X.
2. Connect a signal to the oscilloscope and obtain a stable display.
3. Improve the trigger by setting the Coupling.
(1) Press the MENU in the Trigger control area.
(2) Press Set Up→Coupling→LF Reject or HF Reject
HF Reject (High frequency reject) adds a low pass filter with the -3 dB cut-off point
at 150 kHz. Use HF rejects to remove high frequency noise such as AM or FM
broadcast stations from the trigger path.
LF Reject (Low frequency reject) adds a high pass filter with the -3 dB cut-off point
at 8 kHz. Use LF Reject to remove low frequency signals such as power line noise
from the trigger path.
4. To reduce the noise by setting the acquisition type and adjust the waveform
intensity.
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Rigol DS1000E Series Specifications

General

Brand	Rigol
Model	DS1000E Series
Category	Test Equipment
Language	English