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3. Examples
Example One
：
Measure simple signals
It is very easy to observe unknown signals in a circuit with DSO203. You can see the signal traces,
and measure the frequency and peak-to-peak values of the signal.
In this simple example, following these steps:
1.
Insert a probe into the WAVE OUT socket on your DSO203..
2.
Insert a probe Into CH_B analog input socket. Connect these two probes.
3.
Set output waveform to square wave in G field, 20 KHz in Hfiel, and 50% duty cycle in I field.
4.
Select DC coupling for CH_B in upper C field, and select a 2V voltage level in lower C field.
5.
Select AUTO display mode in upper F field, adjust the sampling time to 20uS in lowerF field.
Make sure that the signal trace is displayed clearly.
6.
Select a proper trigger mode in J field. Here,
. Make sure the cursor is yellow.
7.
Adjust trigger level THR in K field to display a stable trace. THR must be yellow also.
8.
Press Parameter
●
button to see a parameter list. Observe signal parameters, e.g.:Vpp (peak-to-
peak voltage), RMS (average value of voltage), FRQ (frequency) and so forth.
Your should see the following screen display
：
Example Two: Acquire a Single Trace
It’s the
most important feature of a digital storage oscilloscope to acquire non-periodic signals like
pulses and spikes. To acquire a single signal trace, you need a priori knowledge of it to set the proper
trigger level and trigger edge. For example, if the pulse is a TTL logic signal, trigger level should be
set as 2V, trigger edge as rising edge. If the signal is not stable, you should observe it in a AUTO
display mode to find the proper trigger level and trigger edge.
Operation procedure is as following
：
1.
Connect a probe from CH_B to a test point in you circuit.
2.
Select single trace display mode, SINGL (F upper).
3.
Select DC coupling for CH_B (C upper).
4.
Select rising edge trigger (J).
5.
Adjust horizontal time level (F lower) and voltage scale (C lower) to proper ranges.
6.
Adjust trigger level in THR (K).
7.
Press
, and wait for properly trigger signal to appear. If a signal reaches preset trigger level, a
Summary of Contents for DS203
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