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6.Demonstration
87
Gain = Output Signal / Input signal
Gain (db) = 20×log (gain)
Figure 6-2 Waveform of Gain Measurement
Example 3: Capturing a Single Signal
It's quite easy to use Digital Oscilloscope to capture non-periodic signal, such as a
pulse and burr etc. But the common problem is how to set up a trigger if you have no
knowledge of the signal? For example, if the pulse is the logic signal of a TTL level,
the trigger level should be set to 2 volts and the trigger edge be set as the rising edge
trigger. With various functions supported by our Oscilloscope, user can solve this
problem by taking an easy approach. First to run your test using auto trigger to find
out the closest trigger level and trigger type, this helps user to make few small
adjustments to achieve a proper trigger level and mode. Here is how we achieve this.
The operation steps are as follows:
(1) Set the probe menu attenuation coefficient to 10X and that of the switch in the
probe to 10X (see "How to Set the Probe Attenuation Coefficient" on P12).
(2) Adjust the Vertical Scale and Horizontal Scale knobs to set up a proper vertical
and horizontal ranges for the signal to be observed.
(3) Push the Acquire button to display the Acquire menu.
(4) Select Acqu Mode in the bottom menu. Select Peak Detect in the right menu.
(5) Push the Trigger Menu button to display the Trigger menu.
(6) Select the first menu item in the bottom menu. Select Single in the right menu.
(7) In the left menu, select Edge as the mode.
(8) Select Source in the bottom menu. Select CH1 in the right menu.
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