How to choose a digital oscilloscope. Advantages of a digital oscilloscope

A digital oscilloscope is a device that allows you to monitor electronic signals. With its help, scientists can make various measurements of parameters. In this case, the oscillations can be visually monitored or immediately recorded on any medium. With the help of a special converter, it is additionally possible to investigate non-electric processes.

When observing fluctuations, scientists look at the amplitude of the signal, as well as its duration. Old oscilloscopes worked by deflecting a light beam. At the same time, a special paper tape was used to record the oscillations. In turn, the writing element was ink. In modern models, the electron beam is focused on the screen and as a result, a picture with data appears.

Advantages of oscilloscopes

First of all, it should be noted that the image can be frozen. You can do this at any time, which is very convenient. Also it is necessary to mention the high accuracy of the measurement. At the same time, the bandwidth is quite wide. Regardless of the scanning speed, the image on the screen is always clear and bright. Before the starting torque, the signal is already displayed on the display.

Detecting impulse noise during operation is possible. The signal parameters are measured in automatic mode. If necessary, the digital oscilloscope can be connected to a personal computer. You can use the printer to print data. The final signal is processed not only mathematically, but also statistically. In addition, there are means for self-diagnosis.

Homemade devices

A homemade digital oscilloscope can be done. The most important element of this device is a cathode-ray tube. All the deviations of the beam are fixed by it. At the same time, the voltage in the device reaches 300 V. Also for the design of the signal amplitude, the oscilloscope digital (the scheme is shown below) must have an amplifier. He is also able to control the speed of dispersal of the luminograph.

To avoid violations of the frequency multiplicity, a lock is installed. It blocks the beam during the return stroke. In turn, the sweep generator transmits data to the modulator. To correct the deviations of the signal, there is a phase shifter. Also, a self-made digital oscilloscope is equipped with a regulator to stabilize the oscillations. Diodes usually establish a tunnel type.

How to choose a quality oscilloscope?

First of all, we should pay attention to the average sampling rate. This parameter should be within 400 - 600 MV / s. Additionally, good oscilloscopes can do an equivalent sample. The screen resolution should be no less than 480 by 234 pixels. The frequency meter is only welcomed six-bit. Another device is required to support CP programming commands. From the functions of the oscilloscope, you should check the recording of data, as well as playback. Additionally, a testing program must be installed to the limits. A digital oscilloscope costs an average of 15 thousand rubles.

Models of the company "Siglent"

Oscilloscopes of this brand have great potential. The average bandwidth of them is 25 MHz. The models can be used in a wide variety of industries. They differ in their low noise level. The average sampling rate reaches 500 MB / s. At the same time, the memory capacity is 32 thousand points.

Among other things, the device has convenient displays of 7 inches with a resolution of 480 by 234 pixels. Support for CP programming commands is available. It should be noted and user-friendly interface. In general, the oscilloscopes of the above company are suitable for carrying out laboratory as well as research projects.

Oscilloscope "Siglent SDS 1022": characteristics and price

This digital storage oscilloscope has a resolution of 6 bits. The error is 0.001%. All signals that are captured by the synchronization system are displayed on the screen. The frequencies are shown in the range from 10 to 100 Hz. In total, this model provides 3 modes: automatic, normal and single. Synchronization by level can be carried out. The sweep speed ranges from 100 to 200 ms. Support for CP commands is available. You should also highlight the availability of recording and playback functions. This model will cost the buyer 16 thousand rubles.

What is the difference between "Sigluent SDS 1052"?

This multimeter-oscilloscope digital from the previous model has a greater bandwidth. The front rise rate is 5.8 ns. In total, this model has 2 channels. Additionally there is an input for external synchronization. The vertical sensitivity is quite high. The resolution is in the region of 8 bits.

The sweep speed reaches 100 ms. The maximum input voltage is 400 V. By the pulse parameters, you can synchronize. The data is sampled in real time. The total memory capacity of the device is 32 thousand points. As a result, the model was very simple and comfortable to use. It costs about 15 thousand rubles.

Oscilloscopes of the trade mark "Rigol"

Oscilloscopes of this company are characterized by high performance. In this case, the sensitivity can be adjusted very precisely. In addition, it should be noted that false alarms are practically excluded. In many respects it is connected with the qualitative filter. The display in the oscilloscope is dual with a time scan. You can use the startup to view the diagrams. In use, the oscilloscope is quite simple. To this end, manufacturers equipped the device with a signal intensity regulator. As a rule, there are 2 channels. The average rise time is 4 ns. The vertical resolution is 8 bits. DC and AC input connections are installed.

Oscilloscope (digital) Rigol DS1102C is the most common. You can start this device in front or in tilt mode. The interface is pretty straightforward. There are 2 channels and external launch. The average rise time is 5 ns. The vertical resolution parameter is in the region of 8 bits. The frequency meter is set fairly accurate, and its error reaches a maximum of 0.001%. Manual mode for fixing the cursors is provided. Also note the function of signal tracking. In total there are 2 modes of formation (vector and point). The total memory is 32 thousand points. The price for this model fluctuates around 20 thousand rubles.

Oscilloscope "Tektronix TDS 3064"

Most often this digital storage oscilloscope is used for setting up electronic lines. Among other things, it is able to cope with the functioning of the board. The maximum sample rate is 1 Gb. There are 2 channels with a bandwidth of 100 MHz. The digital filter is easy to configure. In addition, the oscilloscope is equipped with a recorder. In total, the model provides for 20 automatic measurements. The function of storage and playback is available.

You can record data by frame. All basic mathematical functions are established. Among other things, we can distinguish the presence of a Fourier converter. You can start the device on the front or the length of the pulse. Also, the device is capable of operating with a start delay. Autocalibration in this model by the manufacturer is provided. The hardware frequency counter is built-in type. In general, the model was rather compact. Also it should be noted its nice design. It is worth a digital oscilloscope (portable) "Tektroniks TDS 3064" in specialized stores about 22 thousand rubles.

Characteristics of Tektronix MSO 4104

The maximum bandwidth in this model reaches 100 MHz. The sampling frequency at the start is at 1 Hz. The average rise time is 5 ns. Of the features can be identified the presence of input impedance. The horizontal sweep time is on average 50 seconds. In total the manufacturer provides 2 channels. In this case, the external launch is installed. The total memory capacity of the oscilloscope is 1 MB.

The vertical sensitivity fluctuates around 1-10 V. The trigger modes are provided for video, as well as for the front. All the basic mathematical functions in the device can be performed. With automatic measurement, the rise time is taken into account. Cursor data can be obtained in automatic mode. In general, the model was rather compact. It weighs in its assembled form only 2.4 kg. The digital oscilloscope (portable) "Tektronix MSO 4104" will cost the buyer in 18 thousand rubles.

Oscilloscopes of the company "Akip"

Digital oscilloscopes "Akip" are characterized by a convenient interface. In addition, they are multifunctional. The bandwidth usually ranges around 60 MHz. The average sample rate is 550 MB / s. The memory capacity is standard for 32 thousand points. The resolution of the screens is 480 by 234 pixels. The hardware frequency counter is installed on all six-bit models. Support for CP commands is available.

Among other things, it should be noted the test function. It occurs on the limits of "Paz" and "Fal". The sweep speed of oscilloscopes is quite high. Among the shortcomings, one can note a poor vertical resolution. There are also certain problems with measurement errors. In many respects this is due to the input impedance. The maximum voltage of the oscilloscope is 400 V. The correction for the probe can be carried out. The oscilloscopes of the above brand stand, compared with the products of other manufacturers, quite cheap.

Model parameters "Ovon DS 10"

Digital Oscilloscope Owon DS 10 has an average bandwidth of 55 MHz. The rise time of the front fluctuates around 7 ns. The total number of channels in this model is 2. The measurement error is 3%. The vertical resolution of the screen is only 5 bits. At the same time, the sweep speed is quite large. The input impedance in this oscilloscope is available. The maximum voltage of the device is 400 V. The correction for the probe can be done. The main synchronization modes are automatic and single. Signals by the system are accepted absolutely of all kinds.

The total memory is 32 thousand points. Form formation mode is available. Also note the algorithm for signal recovery. The sample can be carried out directly or averaged. The color scheme in this model is inverted. Operating temperature of the device varies from 10 to 40 degrees. At the same humidity should be a maximum of 85%. The standard kit includes the following: a usb cable , a digital oscilloscope , a probe, a power cord, a software disc, and instructions. This model is worth about 19 thousand rubles.

Oscillograph "Ovon DS 20"

This digital oscilloscope can be used for various laboratory studies. It differs by a high sampling rate. The capture speed is also good. There are 2 channels in this device. You can easily configure the digital filter. In addition, a recorder is installed in the device. With its help, you can make a wide variety of vibration measurements. The automatic mode in the oscilloscope is provided. It is possible to record data by frames.

Another model is capable of storing and reproducing an oscillogram on a personal computer. If necessary, you can print it on the printer. All mathematical functions are supported by the model. The converter "Fourier" in this oscilloscope is provided. Of the features can be identified auto-calibration. It is quite simple and does not take much time. The hardware frequency counter is installed in the built-in type. The average operating frequency fluctuates around 1 Hz.

The increase is at 6 ns. The display in this model is set to 5.6 inches. The scan function works in the offline mode. The error of time intervals is 0.01%. Additionally, an external synchronization program with a delay is installed. Measurement by the coefficient of filling can be carried out. In general, the model turned out to be quite convenient. It is worth about 22 thousand rubles in stores.

Summarizing

The most multifunctional are the Siglent oscilloscopes. First of all, it should be noted their great performance. Models "Siglent SDS 1022" are able to brag of good accuracy of measurements. In addition, they have reasonable prices, and this factor is not unimportant. In turn, the oscilloscope company "Akip" is more suitable for novice researchers. They have acceptable characteristics, and the interface is simple and straightforward.