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, the oscillations can be visually monitored or immediately recorded on any medium. Using 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, there was a special paper tape for recording vibrations. 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.
Oscilloscope Benefits
First of all, the possibility of freezing the image should be noted. You can do this at any time, which is very convenient. It is also necessary to mention the high accuracy of measurement. At the same time, the bandwidth is quite wide. Regardless of the scan speed, the image on the screen is always clear and bright. Until the starting moment, the signal is already shown on the display.
It is possible to detect impulse noise during operation. Measurement of signal parameters occurs in automatic mode. If necessary, the digital oscilloscope can be connected to a personal computer. You can use a printer to print 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 device is the cathode ray tube. It is she who fixes all the deviations of the beam. In this case, the voltage in the device reaches 300 V. Also, to design the signal amplitude, the digital oscilloscope (the diagram is shown below) must have an amplifier. He is also able to control the speed of acceleration of the luminograph.
To eliminate violations of the frequency multiplicity, a lock is set. It blocks the beam during the return stroke. In turn, the sweep generator transmits data to the modulator. To correct deviations of the signal there is a phase shifter. Also, a homemade digital oscilloscope is equipped with a regulator to stabilize the oscillations. Diodes usually install a tunnel type.
How to choose a quality oscilloscope?
First of all, attention should be paid to the average sampling rate. This parameter must be between 400 - 600 MV / s. Additionally, good oscilloscopes are capable of making equivalent sampling. Screen resolution should be no less than 480 by 234 pixels. The frequency counter is only six-digit. Another device must 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.
Models of the Siglent company
Oscilloscopes of this brand have great potential. Their average bandwidth is 25 MHz. Models can be used in a wide variety of industries. They differ in low noise. The average sampling rate reaches 500 MV / s. In this case, the amount of memory is 32 thousand points.
Among other things, the device has convenient 7-inch displays 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 laboratory and research projects.
Oscilloscope "Siglent SDS 1022": characteristics and price
This digital storage oscilloscope resolution is 6 bits. Moreover, 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 take place. Sweep speed ranges from 100 to 200 ms. Support for CP 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 multimeter-oscilloscope differs from the previous model in a larger bandwidth. The front rise rate is 5.8 ns. In total, 2 channels are provided in this model. Additionally, there is an input for external synchronization. The vertical sensitivity is quite high. The resolution indicator is in the region of 8 bits.
Sweep speed reaches 100 ms. The maximum input voltage is 400 V. By the parameters of the pulse, synchronization can be carried out. Data sampling occurs in real time. The total memory 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.
Oscilloscopes of the Rigol trademark
Oscilloscopes of this company are characterized by 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 eliminated. This is largely due to a quality filter. The oscilloscope has a dual time-lapse display. You can use the launch to view the diagrams. Oscilloscopes are pretty simple to use. To this end, manufacturers equipped the device with a signal intensity regulator. Typically, 2 channels are provided. The average rise time is 4 ns. The vertical resolution is 8 bits. DC and AC input connections are installed.
The (digital) oscilloscope Rigol DS1102C is the most common. You can start this device in the front or tilt mode. The interface is pretty straightforward. In total, 2 channels and an external trigger are provided. The average rise time is 5 ns. The vertical resolution setting is around 8 bits. The frequency counter is set fairly accurate, and the error reaches a maximum of 0.001%. Manual cursor lock mode is provided. It should also be noted the function of tracking the signal. In total, there are 2 formation modes (vector and point). The total memory capacity is 32 thousand points. The price of this model fluctuates around 20 thousand rubles.
Oscilloscope "Tectronics TDS 3064"
Most often, this digital storage oscilloscope is used to set 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 simple to set up. In addition, the oscilloscope is equipped with a recorder. In total, the model provides 20 automatic measurements. Storage and playback function in stock.
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 front or the pulse length. The device is also able to work with a delayed start. 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 for its nice design. There is a digital oscilloscope (portable) "Tektroniks TDS 3064" in specialized stores about 22 thousand rubles.
Specifications "Tektroniks MSO 4104"
The maximum bandwidth in this model reaches 100 MHz. The sample rate at startup is around 1 Hz. The average rise time is 5 ns. Of the features we can distinguish the presence of input impedance. Horizontal scan time is on average 50 s. In total, the manufacturer provides 2 channels. In this case, an external start is installed. The total memory capacity of the oscilloscope is 1 MB.
Sensitivity vertically fluctuates around 1-10 V. Launch modes are provided for the video, as well as the front. All basic mathematical functions in the device can be performed. With automatic measurement, the rise time is taken into account. Cursor data can be retrieved automatically. In general, the model turned out to be quite compact. It weighs in assembled form only 2.4 kg. The digital oscilloscope (portable) Tektroniks MSO 4104 will cost 18 thousand rubles to the buyer.
Oscilloscopes
Akip Digital Oscilloscopes feature a user-friendly interface. In addition, they are multifunctional. The bandwidth usually fluctuates around 60 MHz. The average sampling rate is 550 MV / s. The standard memory capacity of 32 thousand points is provided. The resolution of the screens is 480 by 234 pixels. A hardware frequency meter is installed on all six-digit models. Support for CP commands is available.
Among other things, the test function should be noted. It occurs along the limits of "Pass" and "Fal." Oscilloscopes sweep speed is quite high. Among the shortcomings, poor vertical resolution can be noted. There are also certain problems with measurement errors. This is largely due to the input impedance. The maximum voltage of the oscilloscope is 400 V. Correction for the probe can be carried out. Oscilloscopes of the above trademark are relatively 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 this model. The measurement error is 3%. The vertical resolution of the screen is only 5 bits. In this case, the sweep speed is quite large. The input impedance in this oscilloscope is available. The maximum voltage of the device is 400 V. Correction for the probe can be done. The main synchronization modes are automatic and single. The signals are received by the system absolutely all kinds.
The total memory capacity is 32 thousand points. Form forming mode is available. Also worth noting is the signal recovery algorithm. 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. The humidity should be at most 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.
Oscilloscope "Ovon DS 20"
This digital oscilloscope can be used for various laboratory tests. It is distinguished by a high sampling rate. The capture speed is also good. In total there are 2 channels in this device. Setting up a digital filter is quite simple. Additionally, a recorder is installed in the device. With it, you can make a variety of measurements of vibrations. Automatic mode is provided in the oscilloscope. It is possible to record data by frame.
Another model is able to save and reproduce the waveform on a personal computer. If necessary, it can be printed on a printer. All mathematical functions of the model are supported. The Fourier transducer is provided in this oscilloscope. Of the features we can distinguish autocalibration. 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 rise rate is at around 6 ns. The display in this model is set to 5.6 inches. The sweep function works offline. The error of time intervals is 0.01%. Additionally, an external synchronization program with a delay is installed. The duty cycle measurement can be performed. In general, the model turned out pretty comfortable. It costs in stores about 22 thousand rubles.
Summarizing
The most multifunctional are oscilloscopes of the Siglent company. First of all, their great performance should be noted. Siglent SDS 1022 models are capable of boasting good measurement accuracy. In addition, they have reasonable prices, and this is an important factor. Oscilloscopes, in turn, are more suitable for novice researchers. They have acceptable characteristics, and the interface is simple and straightforward.