To Reduce The Random Noise On A Signal - HP 54616B User And Service Manual

Operating Your Oscilloscope

To reduce the random noise on a signal

To reduce the random noise on a signal
If the signal you are applying to the oscilloscope is noisy (figure 2-21), you
can set up the oscilloscope to reduce the noise on the waveform (figure
2-22). First, you stabilize the displayed waveform by removing the noise
from the trigger path. Second, you reduce the noise on the displayed
waveform.
Connect a noisy signal to the oscilloscope and press
1
Obtain a stable display by removing the noise from trigger path;
2
press
or the
High frequency reject (HF Reject) adds a low pass filter with the 3 dB point at
50 kHz (see figure 2-19). You use HF reject to remove high frequency noise
such as AM or FM broadcast stations from the trigger path.
Figure 2-19
0 dB
3 dB down point
dc
HF reject (trigger path)
2–30
.
Autoscale
Slope/Coupling
HF Reject softkey.
Pass
Band
50 kHz
, then select either the LF Reject softkey