Example 4: Analyze The Details Of A Signal - Owon PDS8102T User Manual

User Manual of OWON Color Mixed Signal Digital Storage Oscilloscope

Example 4: Analyze the Details of a Signal

Observe the Signal Containing Noises
If the signal is interfered by the noise, the noise may cause a failure in the circuit. For
the analyzing of the noise in detail, please operate the instrument according to the
following steps:
1. Press the ACQUIRE button to display the ACQU MODE menu.
2. Press the F2 menu selection button and choose Peak Detect.
In this case, the screen display contains the wave form of a random noise. Especially
when the time base is set as Low Speed, then noise peak and burr contained in the
signal can be observed with the peak detection (See Fig.6-4).
Fig.6-4 Wave Form of the Signal Containing Noises
Separate Noises from the Signal
When analyze the wave form of a signal, you should remove the noise contained in it.
For the reduction of the random noise in the oscilloscope display, please operate the
instrument according to the following step:
1. Press the ACQUIRE button to show the ACQU MODE menu.
2. Press the F3 menu selection button and choose Average.
3. Press the F4 menu selection button and observe the wave form obtained from
averaging the wave forms of different average number.
After the averaging, the random noise is reduced and the detail of the signal is easier
to be observed. Shown as follows, after the noise is removed, the burrs on the rising
and falling edges appear (see Fig.6-5).
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