How to use Keysight oscilloscopes and the advantages of Keysight digital oscilloscopes

A Keysight oscilloscope is a machine that displays waveforms. It is also known as the "eyes of the electronic engineer." Its core function is to display the actual waveform of the measured signal on the screen for engineers to find positioning problems or evaluate system performance, etc. This product generally has 2 or 4 channels, and their low positions are the same. You can choose it at will, insert the probe into one of the channels, and the small clip on the other end of the probe is connected to the reference ground of the system under test. The probe contacts the point being measured so that the oscilloscope can collect the voltage waveform at that point.

Let’s share three basic methods for using Keysight oscilloscopes:

First of all, before performing the operation method mentioned below, first connect the signal to the oscilloscope, and be careful that the amplitude of the connected signal does not exceed the measurement range. Furthermore, its usage is very basic.

1. Two buttons

AUTO: The automatic setting function adjusts various control values ​​to produce a display of the input signal suitable for observation. RUN/STOP action/stop: The oscilloscope is collecting post-trigger information/the oscilloscope has stopped collecting waveform data.

2. Signal display control

Operation of the horizontal control button: HORIZONTAL menu, change the horizontal scale and waveform position. The center of the screen in the horizontal direction is the time reference point of the waveform. Adjust the position button to move the waveform left and right.

Operation of vertical control buttons: display waveforms, adjust vertical ruler and position, and set input parameters. Each channel needs to be adjusted individually. By adjusting the position button, the waveform can be moved up and down.

3. Trigger mode

The "trigger" of the oscilloscope is to synchronize the oscilloscope's scan with the signal being observed, thereby displaying a stable waveform. There are three basic trigger modes of oscilloscopes: automatic mode (AUTO), normal mode/regular mode (NORM), and single mode (SINGLE).

InfiniiVision 3000T X-Series Oscilloscopes

Keysight digital oscilloscopes are high-performance oscilloscopes manufactured by a series of technologies such as data acquisition, A/D conversion, and software programming. Digital oscilloscopes generally support multi-level menus and can provide users with multiple choices and multiple analysis functions. There are also some oscilloscopes that can provide storage to complete the storage and processing of waveforms.

1. Small size, light weight, easy to carry, LCD display

2. It can store waveforms for a long time, and can perform various operations and analysis such as amplifying the stored waveforms.

3. Especially suitable for measuring single and low-frequency signals. When measuring low-frequency signals, there is no flicker phenomenon that simulates the oscilloscope.

4. More triggering methods, in addition to imitating pre-triggers that oscilloscopes do not have, there are also logic triggers, pulse width triggers, etc.

5. Can be connected to computers, printers, and plotters through GPIB, RS232, and USB interfaces, and can print, archive, and analyze files.

6. It has strong waveform processing capabilities and can automatically measure many parameters such as frequency, rise time, pulse width, etc.

InfiniiVision 2000 X-Series Oscilloscopes

7. The distortion is relatively large, because the digital oscilloscope displays the waveform by sampling the waveform. The fewer the sampling points, the greater the distortion. There are usually 512 sampling points in the horizontal direction, which is limited by the maximum sampling rate. At the fastest scanning speed and There are fewer nearby sampling points, so the distortion is greater at high speeds.

8. Poor ability to measure complex signals. Due to the limited number of sampling points of digital oscilloscopes and the lack of brightness changes, many waveform details cannot be displayed. Although some may have two or more brightness levels, this is only a relative difference. , coupled with the limited display resolution of the oscilloscope, it still cannot reproduce the effect of simulated display.

9. Artifacts and mixed waveforms may appear. When the sampling clock frequency is lower than the signal frequency, the displayed waveform may not be the actual frequency and amplitude. The bandwidth of a digital oscilloscope is closely related to the sampling rate. When the sampling rate is not high, interpolation calculations are needed, which can easily lead to mixed waveforms.