How to treat the camera oscilloscope

Steps of oscilloscope self-inspection:

Step 1: Remove all probes, converters and signal connections of the oscilloscope.

Step 2: Turn on the oscilloscope and preheat it for about a quarter of an hour. Usually, the temperature difference will affect the self-calibration of oscilloscope.

Step 3: Select the main interface menu to enter the utility and open the secondary menu.

The fourth step; Step 3: Enter the secondary menu and click "Instrument".

Calibration "or a button with a similar name.

Step 5: Wait. After SPC calibration passes, "Pass" will be displayed. Check the oscilloscope status and select Run.

SPC, wait about a quarter of an hour.

How to use an oscilloscope:

1.

After opening the oscilloscope, first check its function and calibrate the probe compensation. First, connect the oscilloscope probe (the switch on the probe is generally set at the position of X 10) and the grounding clip to the "Probe Element" connector on the panel, and then press the "Auto Setup" button. At this time, if the oscilloscope functions normally, the left screen will display 1kHZ with a voltage of 5V.

2.

If the displayed square wave is distorted, as shown in Figure 2, the probe should be compensated and adjusted, and the "over-compensated" waveform is on the left; On the right is the waveform of "insufficient compensation". At this time, the instrument can be equipped with tools to adjust the probe capacitance.

3.

Taking the burr pulse generated by DC power switch as an example, the capture process of aperiodic burst pulse signal is explained. First, connect the probe to a DC power supply, as shown in Figure 4, select a fixed value and set the voltage to 2V.

4. Adjust the "trigger level" knob on the right side of the instrument panel, and set the capture pulse level to be slightly higher than the signal, which is set to be 0.2V higher here. When the "trigger level" knob on the dashboard is adjusted, the yellow arrow on the screen moves accordingly, and the words "2.2V" and "rising edge trigger" are displayed at the bottom of the screen.

5. Adjust the "Horizontal Position" knob to set the position of the captured burst pulse on the X axis, which is located at the origin of the X axis (time axis), and the white arrow at the top of the screen moves in the horizontal direction accordingly.

6. Then, press the "disposable" main button to prepare to catch the trigger.

Pulse, the white arrow on the screen shows the word "ready", indicating that it is ready.

7。 Turn the DC power switch to the OFF position. At this time, because the switch will generate a jitter pulse, this jitter pulse will be captured by the oscilloscope, and "Acq" will be displayed above the white arrow on the screen.

Done ",and we can see a sharp pulse on the original DC level on the screen.

8. The captured sharp pulse waveform will be saved by the oscilloscope for our analysis and research. Just adjust the "second grid" and "volt grid" on the panel, and the position of the captured pulse waveform can be enlarged and moved.

1, the role of oscilloscope: oscilloscope is a very widely used electronic measuring instrument. It can transform electrical signals invisible to the naked eye into visible images, which is convenient for people to study the changing process of various electrical phenomena. Oscilloscope uses a narrow electron beam composed of high-speed electrons to hit the screen coated with fluorescent substances, which can produce tiny light spots (this is the working principle of traditional analog oscilloscope). Under the action of the measured signal, the electron beam, like a pen tip, can draw the curve of the instantaneous value of the measured signal on the screen. Oscilloscope can be used to observe the waveform curves of different signal amplitudes changing with time, and can also be used to test various electric quantities, such as voltage, current, frequency, phase difference and amplitude modulation.

2. How to use the oscilloscope:

(1) Preset: Turn the brightness knob counterclockwise to the bottom, move the vertical and horizontal positions to the middle, set the attenuation to the highest level, and set the scanning to "outer X range".

(2) Turn on the power again, wait for a minute or two before preheating, and then carry out related operations.

(3) Adjust the brightness first, then focus, and then adjust the horizontal and vertical displacement, so that the bright spot is in the appropriate area in the center.

(4) Adjust scanning, scanning fine adjustment and X gain, and observe scanning.

(5) Pull the external X file to the appropriate position of the scanning range file, and observe that the voltage waveform provided by the machine changes according to the sine and cosine law in the vertical direction.

(6) Connect the applied voltage to be studied to the oscilloscope from Y input and ground, and adjust each gear to the appropriate position, so that the waveform of this voltage (an image that changes with time) can be observed (by adjusting the synchronous polarity switch, the starting point of the image can start from the positive half cycle or the negative half cycle).

(7) Observe the vertical deviation of bright spots (for example, when DC voltage is applied) and adjust the scanning to "external X".

How does the oscilloscope save waveform data? What do you think?

There is an article devoted to this: understanding the various file storage methods of oscilloscope WAV: the first way to save data files is to save the waveform data samples displayed on the screen as binary files, and save them to local or external memory in WAV format, which can be called to open, view, zoom and so on in this machine. CSV: The second way to save data files, it will save the waveform data of the current channel of the oscilloscope, and save it to the internal memory of the oscilloscope or external USB flash drive in CSV format. It is a comma-separated value file format, and its file stores table data in plain text. It will convert the required binary data into ASCII code and save it in ASCII code data. You can open it with Excel, Access or a text file, but you can't call this machine. The following figure shows the interface after opening a CSV file with Excel, and below it is a line chart synthesized with E and F as coordinates: due to the saving time, the data files saved with WAV and CSV are also sampled (there are 87,500 data points in the following figure), and the data saving time is controlled within 2 seconds, and most information of the signal can be seen at the same time. Therefore, for individual users who need to completely save a screen of 28M waveform data, they are faced with these tens of millions. Don't worry, TO 1000 series flat-panel oscilloscopes provide a third way to save this demand: the specific operation flow of BIN is shown in the following figure, and tens of millions of huge data can be obtained in less than 60S before and after operation. Data2csv.exe gadget download address:

Description of important parameters of oscilloscope

1, number of channels

General analog oscilloscopes and digital oscilloscopes can be divided into: single channel/single channel oscilloscopes; Dual-channel/dual-trace oscilloscope; 2+ 1 channel (1 external trigger)/three-trace oscilloscope; Four-channel/four-trace oscilloscope.

2. Bandwidth

The bandwidth is determined according to the oscilloscope test requirements, and the classification selection is 5m/10m/20m/40m/60m/100m/1g. ...

3.y axis plug-in

The display mode selection switch is used to switch the working states of the two Y-axis preamplifiers YA and YB. "Alternate": When the display mode switch is set to "alternate", the electronic switch is controlled by the scanning signal, and the YA or YB signal is turned on in turn for each scan. When the frequency of the measurement signal is high, the frequency of the scanning signal is also high. The faster the switching speed of the electronic switch, there will be no flicker. This working state is suitable for observing two signals with higher working frequency.

Extended data

Difference between digital oscilloscope and analog oscilloscope

1, the difference between volume and weight.

The simulator is bigger than the digital computer, which is a little bulky and inconvenient to carry, while the digital computer is light in weight and very convenient to carry.

2. The display is different.

The waveform displayed by the analog oscilloscope is continuous, which is the real waveform of the signal and the response speed is very fast. The waveform displayed by digital oscilloscope is composed of sampling points of digital circuit, which is a discontinuous waveform. The higher the sampling rate, the closer it is to the real waveform, but the display speed is not as fast as that of the simulator.

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