Principle and Function of Dual Trace Oscilloscope

Everyone has learned about the structural composition of the dual-trace oscilloscope. After understanding the structure, you can have a deeper understanding of the principle and function of the dual-trace oscilloscope. Now, experts from China Sensor Trading Network will introduce to you the relevant knowledge about the principle and function of the dual-trace oscilloscope.

When the display mode switch is set to the YA or YB position, the electronic switch is a monostable circuit. The preamplifier circuit YA or YB can work independently. At this time, the dual-trace oscilloscope can be used as an ordinary single-line oscilloscope.

When the display mode switch is set to the YA+YB position, the electronic switch is in the non-working state. At this time, the YA and YB channels work simultaneously, so the display of the addition or subtraction of the two signals can be obtained.

However, whether the two signals are added or subtracted is selected by the polarity switch of the YA channel. This switch has two positions. In the first position, the graph on the screen is the sum of the two signals; in the second position (-YA), the graph on the screen is the difference between the two signals.

In order to observe the waveform of the measured signal changing with time, a linear scanning voltage (sawtooth voltage) must be applied to the horizontal deflection plate of the oscilloscope.

This scanning voltage is generated by the scanning circuit. When a trigger signal is added to the trigger circuit, the scanning circuit is triggered and the scanning circuit generates a corresponding scanning signal; when no trigger signal is added, the scanning circuit does not generate a scanning signal.

The above is an introduction to the principle and function of the dual-trace oscilloscope. You can understand the above knowledge through your own practical operations.