A digital oscilloscope is a device that allows you to monitor electronic signals. With it, scientists can make various measurements of parameters. In this case, vibrations can be visually monitored or immediately recorded on any medium. With the help of a special converter, it is additionally possible to study non-electrical 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 vibrations. In turn, the writing element was ink. In modern models, the electron beam is focused on the screen and the result is a picture with data.
Oscilloscope Benefits
First of all, it should be noted the possibility of freezing the image. You can do this at any time, which is very convenient. It is also necessary to mention the high measurement accuracy. At the same time, the bandwidth is quite wide. Regardless of sweep speedThe image on the screen is always clear and bright. Before the triggering moment, the signal is already shown on the display.
It is possible to detect impulse noise during operation. Signal parameters are measured automatically. If necessary, a digital oscilloscope can be connected to a personal computer. You can use a printer to print the data. The final signal is processed not only mathematically, but also statistically. Additionally, there are tools for self-diagnosis.
Homemade Devices
You can make a homemade digital oscilloscope. The most important element of this instrument is the cathode ray tube. It is she who fixes all deviations of the beam. In this case, the voltage in the device reaches 300 V. Also, to design the signal amplitude, a digital oscilloscope (the circuit is shown below) must have an amplifier. He is also able to control the acceleration speed of the luminograph.
To exclude 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. There is a phase shifter for correcting signal deviations. Also, a home-made digital oscilloscope is equipped with a regulator to stabilize oscillations. Diodes are usually installed tunnel type.
How to choose a quality oscilloscope?
First of all, you should pay attention to the average sampling rate. This parameter should be in the range of 400 - 600 MV/s. Extra goodoscilloscopes are capable of equivalent sampling. The screen resolution must be at least 480 by 234 pixels. The frequency meter is welcome only six-digit. The device must also support CP programming commands. Of the functions of the oscilloscope, you should check the data recording, as well as playback. Additionally, a limit testing program must be installed. A digital oscilloscope costs an average of 15 thousand rubles.
Siglent Models
Oscilloscopes of this brand have great potential. Their average bandwidth is 25 MHz. Models can be used in a variety of industries. They differ in low noise level. The average sampling rate is up to 500 MB/s. At the same time, the memory capacity is 32 thousand points.
Among other things, the device has comfortable 7-inch displays with a resolution of 480 by 234 pixels. Support for CP programming commands is available. Not to mention the user-friendly interface. In general, the oscilloscopes of the above company are suitable for laboratory as well as research projects.
Oscilloscope "Siglent SDS 1022": specifications and price
This digital storage oscilloscope has a resolution of 6 bits. In this case, the error is 0.001%. All signals that are captured by the synchronization system are displayed on the screen. Frequencies are shown in the range from 10 to 100 Hz. In total, this model has 3 modes: automatic, normal and single. Level synchronization can be performed. The sweep speed ranges from 100 to 200 ms. Support for SR commands is available. You should also highlight the presence of recording and playback functions. This model will cost the buyer 16 thousand rubles.
What is the difference between "Siglent SDS 1052"?
This digital oscilloscope multimeter differs from the previous model in a larger bandwidth. The rise time 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. Resolution is around 8 bits.
Sweep speed up to 100ms. The maximum input voltage is 400 V. Synchronization can be carried out according to the parameters of the pulse. Data sampling occurs in real time. The total memory capacity of the device is 32 thousand points. As a result, the model turned out to be very simple and comfortable to use. It costs about 15 thousand rubles.
Rigol brand oscilloscopes
The company's oscilloscopes are high performance. In this case, the sensitivity can be very precisely adjusted. Additionally, it should be noted that false alarms of the device are practically excluded. This is largely due to the quality of the filter. The display in the oscilloscope has a dual time base display. You can use launch to view schemas. Oscilloscopes are pretty easy to use. To this end, manufacturers have equipped the device with a signal intensity adjuster. As a rule, there are 2 channels. Average rise timeis 4 ns. The vertical resolution is 8 bits. DC and AC input connections established.
Oscilloscope (digital) Rigol DS1102C is the most common. You can launch this unit in front or tilt mode. The interface is pretty clear. In total, 2 channels and an external trigger are provided. The average rise time is 5 ns. The vertical resolution parameter is in the region of 8 bits. The frequency meter is set quite accurate, and its error reaches a maximum of 0.001%. Manual mode for fixing cursors is provided. It should also be noted the function of tracking the signal. In total there are 2 modes of formation (vector and point). The total amount of memory is 32 thousand points. The price for this model fluctuates around 20 thousand rubles.
Oscilloscope "Tektronics TDS 3064"
Most often this digital storage oscilloscope is used for setting up electronic lines. Among other things, he is able to cope with checking the functioning of the board. The maximum sampling rate is exactly 1 GB. In total there are 2 channels with a bandwidth of 100 MHz. The digital filter is quite easy to set up. Additionally, the oscilloscope is equipped with a recorder. In total, the model provides 20 automatic measurements. Storage and playback function available.
You can record data frame by frame. All basic math functions are installed. Among other things, the presence of a Fourier converter can be distinguished. You can start the device on the frontor pulse length. Also, the device is able to work with a start delay. Auto-calibration in this model is provided by the manufacturer. The hardware frequency meter has a built-in type. In general, the model turned out to be quite compact. It should also be noted its pleasant design. There is a digital oscilloscope (portable) "Tektronics TDS 3064" in specialized stores for about 22 thousand rubles.
Characteristics "Tektronics MSO 4104"
The maximum bandwidth in this model reaches 100 MHz. The sampling rate at startup is at around 1 Hz. The average rise time is 5 ns. Of the features, the presence of an input impedance can be distinguished. The horizontal sweep time is 50 s on average. In total, the manufacturer provides 2 channels. In this case, an external trigger is installed. The total oscilloscope memory is 1 MB.
The vertical sensitivity fluctuates around 1-10 V. Trigger modes are provided for video and front. All basic mathematical functions in the device can be performed. In automatic measurement, the rise time is taken into account. Cursor data can be obtained automatically. In general, the model turned out to be quite compact. It weighs only 2.4 kg when assembled. The digital oscilloscope (portable) "Tektronics MSO 4104" will cost the buyer 18 thousand rubles.
Akip's oscilloscopes
Digital oscilloscopes "Akip" are distinguished by convenientinterface. In addition, they are multifunctional. The bandwidth usually fluctuates around 60 MHz. The average sampling rate is 550 MB/s. The amount of memory provided is standard for 32 thousand points. Screen resolution is 480 x 234 pixels. A hardware frequency counter is installed on all six-digit models. Support for CP commands is available.
Among other things, the testing function should be noted. It occurs within the limits of "Paz" and "Fal". The sweep speed of oscilloscopes is quite high. Among the shortcomings can be noted poor vertical resolution. There are also certain problems with measurement errors. A lot of it has to do with the input impedance. The maximum voltage of the oscilloscope is 400 V. Probe correction can be performed. The oscilloscopes of the above brand are quite cheap compared to products from other manufacturers.
Parameters of the "Ovon DS 10" model
The Owon DS 10 digital oscilloscope has an average bandwidth of 55 MHz. The rise time of the front fluctuates around 7 ns. There are 2 channels in total in this model. The measurement error is 3%. The vertical screen resolution is only 5 bits. At the same time, the sweep speed is quite high. The input impedance in this oscilloscope is available. The maximum voltage of the device is 400 V. Probe correction can be done. The main synchronization modes are automatic and single. Signals are accepted by the system of absolutely all kinds.
Total memory is 32k points. Modeform formation is available. Also noteworthy is the signal recovery algorithm. The sampling can be direct or averaged. The color scheme in this model is inverted. The operating temperature of the device ranges from 10 to 40 degrees. In this case, the humidity should be a maximum of 85%. The standard kit includes the following: usb cable, digital oscilloscope, probe, power cord, program disk, and instructions. This model costs about 19 thousand rubles.
Ovon DS 20 oscilloscope
This digital oscilloscope can be used for various laboratory applications. It has a high sampling rate. The capture speed is also good. There are 2 channels in total in this device. Setting up a digital filter can be quite simple. Additionally, a recorder is installed in the device. With it, you can make a variety of measurements of vibrations. The automatic mode in the oscilloscope is provided. It is possible to record data frame by frame.
Another model is able to save and play the waveform on a personal computer. If necessary, it can be printed on a printer. All mathematical functions are supported by the model. The Fourier converter is provided in this oscilloscope. Features include auto-calibration. It is carried out quite simply and does not take much time. Hardware frequency meter installed built-in type. The average operating frequency fluctuates around 1 Hz.
The slew rate is at 6 ns. The display in this model is set to 5.6inches. The sweep function works offline. The time interval error is 0.01%. Additionally, an external synchronization program with a delay is installed. The duty cycle measurement can be carried out. In general, the model turned out to be quite comfortable. It costs about 22 thousand rubles in stores.
Summing up
Siglent's oscilloscopes are the most versatile. First of all, it should be noted their great performance. The Siglent SDS 1022 models boast good measurement accuracy. In addition, they have reasonable prices, and this is an important factor. In turn, Akip's oscilloscopes are more suitable for novice researchers. They have acceptable characteristics, and the interface is simple and clear.
