What are the two types of dual trace oscilloscopes commonly used?

At present, the suitable qi in the commonly used soup is basically the same, as long as it is a double medium, some of which are a good species.

At present, the atmosphere of the commonly used double comprehensive trial broadcast has become bloated, and this is the introduction of this oscilloscope on the relevant **.

If this is a dual-trace oscilloscope that is commonly used at present, this linkage, you can look for it on the Internet, and the introduction on the Internet is basically more detailed.

At present, there are two kinds of commonly used dual-trace oscilloscopes, which are generally wavescopes, and these two should be found in physics.

Make use of an oscilloscope.

It can observe the waveform curves of the amplitude of various signals with time, and can also use it to test various amounts of electricity, such as voltage, current, frequency, and phase difference.

amplitude modulation and so on. It can not only directly observe and display the measured signal, but also observe the front and back edges and pulse width of the pulse signal.

Parameters such as upshoot and downstroke.

In order to ensure the normal use of the oscilloscope and the measurement accuracy, the oscilloscope should be verified and calibrated regularly. Many technical indicators of general oscilloscopes are difficult to be directly verified by general instruments, and the indirect method of using common electronic measuring instruments can not only achieve the purpose of verification, but also expand its scope of use and improve its measurement accuracy.

In the case of a dual-trace or dual-line oscilloscope, two detected signals can also be compared, and the content of the comparison is frequency and amplitude.

The specific usage is as follows:

1 A device that converts a voltage signal into a visible light signal and projects it onto a display screen. The two-wire oscilloscope has two inputs that can be connected to two voltage signals for display.

2 Refer to the figure below.

3 In the oscilloscope, after the input signal is amplified, the two input signals are rotated on the deflection plate The oscilloscope adopts an electronic switch, and the two signals are displayed on the screen of the oscilloscope to promote the observation and comparison of the two signals at the same time.

4 The basic structure of a two-wire oscilloscope is as follows:

A two-wire oscilloscope consists of an oscilloscope, an amplifier, a sweep-triggered system, and a power supply. The display device of the oscilloscope in the display system is the cathode ray tube, or CRT for short. A cathode ray tube is based on an electron-producing system called an electron gun.

5 The electron gun fires electrons at the screen. The electrons emitted by the electron gun are focused into an electron beam and hit a point in the center of the screen. The inner surface of the screen is coated with a fluorescent material so that the dots in the electron beam emit light.

6 A two-wire oscilloscope works as follows:

The electron gun is heated by a filament and emits electrons. The focusing pole focuses the electrons emitted by the electron gun into a very thin electron beam, making the waveform display clear. A high positive voltage is applied to the accelerator pole to attract electrons to leave the gun body at high speed; An extremely high positive voltage is applied to the display to attract electrons to hit the surface of the display, causing the fluorescent material coated on the surface of the display to glow.

A deflection voltage is applied to both the vertical and horizontal deflection plates. The polarity and amplitude of the deflection voltage control the position of the electron beam against the surface of the display. Since the deflection voltage follows the input signal, the beam can "draw" the signal waveform on the screen.

7 The two-wire oscilloscope has two inputs, which can be connected to two voltage signals for display. In the oscilloscope, after the input signal is amplified, the two input signals are rotated by the oscilloscope tube on the deflection plate by using an electronic switch, both signals are displayed on the screen of the oscilloscope tube at the same time to facilitate the observation and comparison of the two signals.

Let's take a look at the manual, each brand of dual-trace oscilloscope, or each model has a different way to use.

Discontinuous mode is suitable for displaying low-frequency signals at low base rates, where the oscilloscope switch can be switched quickly. Alternate mode is suitable for displays of high-frequency signals that require the use of a faster timebase setting.

A dual-trace oscilloscope is a commonly used test instrument that can measure and display the waveforms of two different signals at the same time.

The first step in using a dual-trace oscilloscope is to input the signal from the device under test onto the oscilloscope. In general, an oscilloscope has a BNC signal input interface that requires a signal cable to connect the device under test to the oscilloscope.

Next, you need to adjust the oscilloscope to dual-trace mode. Using the control buttons or knobs on the oscilloscope, select the Dual Trace mode, and set the gain and trigger mode for the Dual Trace channel.

You can then use the horizontal and vertical control buttons or knobs on the oscilloscope to adjust the position of the waveform on the screen and how loud it is. In addition, the oscilloscope's trigger control buttons or knobs can be used to adjust the trigger level and trigger source to ensure that the waveform is always stable.

Once the oscilloscope is set up, you can start measuring and analyzing the characteristics of the signal. You can compare the waveform differences between two signals, see the phase relationship between them, and measure parameters such as amplitude, frequency, peak, etc. of the signal.

When using a dual-trace oscilloscope, you need to pay attention to safety issues. Make sure that the connected cables and wire ports are plugged correctly to avoid misinsertion or reverse. In addition, it is also necessary to pay attention to the voltage and current range of the device under test, and do not let the voltage or current be too high to avoid damaging the oscilloscope or the device under test.

The dual-trace oscilloscope has two inputs, which can be connected to two voltage signals at the same time for display. Inside the oscilloscope, after the input signal is amplified, the two input signals are switched to the deflection board of the oscilloscope tube in rotation by using an electronic switch, so that the two signals are displayed on the screen of the oscilloscope at the same time, which is convenient for the observation and comparison of the two signals.

Differences from single trace oscilloscopes:

First of all, you can compare and observe two sets of signals at the same time (especially when repairing faulty equipment, it is very straightforward to have the same good equipment at hand);

Second, the two signals are displayed directly, when there are two related signals, so that the phase shift can be roughly seen;

Third, there are more operations on addition and subtraction.

A single trace oscilloscope can only test (see) one waveform, while a dual trace oscilloscope can detect (see) two waveforms at the same time (or inspect two machines at the same time) for easy graphical comparison.

A single trace oscilloscope has only one channel and can only test one waveform.

The dual-trace oscilloscope has 2 channels and can test 2 waveforms at the same time for easy comparison.

For details, please refer to the oscilloscope tutorial of China Electronics DIY Home.