Rationale for choosing a modern electronic oscilloscope. Scheme, description

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Rationale for choosing a modern electronic oscilloscope. Encyclopedia of radio electronics and electrical engineering

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Encyclopedia of radio electronics and electrical engineering / Measuring technology

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For the work of a radio circuit engineer with electronic devices made using modern technologies, including digital, one of the main electronic devices for measuring electrical signals is an oscilloscope.

When working with a wide range of modern devices made using printed wiring, you need a modern, high-quality universal oscilloscope that would allow you to study both analog and digital electronic circuits.

At the same time, it should provide modern requirements for interfacing with computer technology for documenting research.

Therefore, in my (Pomelov Vladislav Nikolaevich) opinion, a universal modern oscilloscope for general use (not specialized, for example, in the field of high-frequency research), if you do not put the cheapness of the device in the first place, should have the following characteristics, functions, capabilities:

1. Several analog measurement channels (two or more);
2. Several digital measurement channels, for measuring and documenting digital logic nodes (four or more);
3. Buffer memory, which stores the measurement results for each channel;
4. Built-in standard port (Centronics, RS-232 or other) for saving measurement results in any electronic format;
5. Accordingly, to work with the ports, the manufacturer's oscilloscope software (if required for pairing) must be included in the package for at least Windows ® 95 and 98;
6. Based on their items 1-5, it is clear that the oscilloscope must be digital (memory) in its basis;
7. The bandwidth of the measurement channels must be at least 100 MHz;
8. The timebase must match the bandwidth, i.e. allow to see at least one period of a periodic signal with a maximum frequency on the oscilloscope screen (for a signal with a frequency of 100 MHz, the period will be 10 nanoseconds);
9. The oscilloscope must still be an external device in relation to the computer (i.e. not in the form of an expansion board) to exclude the influence of the measurement results of the board’s power parameters (from the computer power supply), the properties of operating systems installed on the PC, viruses and so on.;
10. Measurement accuracy is not worse than ±2%
11. Built-in device calibration;
12. AC power supply 50Hz 220V
13. Desirable to speed up work:

automatic selection of limits vertically, horizontally;
auto-measurement and alphanumeric indication of the main signal parameters (amplitude, frequency, duration).

Author: Pomelov Vladislav Nikolaevich; Publication: cxem.net

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