What is an oscilloscope?

A typical oscilloscope is a rectangular field with a small screen, numerous input connectors and control buttons and buttons on the front panel. For measuring to help the face is drawn grid called grid. Each square in gritle is known as a division. The signal to be measured is fed to one of the input connectors, which is usually a coaxial connector, such as BNC or N. If the signal source has its own coaxial connector, a simple coaxial cable is used; Otherwise, a specialized cable called the scope probe, supplied by an oscilloscope, is used. One of the controls, the control of the time base, sets the speed that the line is drawn and is calibrated in seconds on the division. If the input voltage leaves zero, the track is deflected either up or down. Other controls, vertical contract, set the scale of vertical deflection and is calibrated in the volts on the division. The resulting track is a chart of tension against time (present in variousLocation, the last past left, less recent past to the right).

If the input signal is periodic, then you can get almost a stable track by setting the time base to match the input signal frequency. For example, if the input signal is 50 Hz sinus wave, then its period is 20 ms, so the time base should be modified so that the time between subsequent horizontal sweeping is 20 ms. This regime is called constant sweeping. Unfortunately, the time base of the oscilloscope is not absolutely accurate and the frequency of the input signal is not perfectly stable, so the trace is carried through the screen, making the measurement more difficult.

To ensure a more stable track, the oscilloscope has a function called. This will cause the range to suspend the right side of the screen and wait for the specified event before returning to the left side of the screen and drawing another track.

effect is resynchronIzing the time base for the input signal and prevent the horizontal drift of the track. The trigger circuits allow you to display non -periodic signals such as individual pulses, as well as periodic signals such as sinus waves and square waves.

Types of triggers include:

• External trigger, pulse from an external source connected to the reserved input in the range.
• Edge Trigger, an edge detector that generates a pulse when the input signal passes through a specified threshold in a specified direction.
• Video Trigger, a circuit that extracts synchronization pulses from video formats such as PAL and NTSC, and triggers a time base on each line, a line, each field or every frame. This circuit is usually found in MONI in the equipment of the device.
• A delayed trigger, which will wait before starting the specified edge. No trigger circuit is instantly, so there is always a certain delay, but the trigger delay circuit extends this delay to knownand adjustable interval.

Most oscilloscopes also allow you to bypass the time base and supply the external signal to the horizontal amplifier. This is called the X-Y mode and is useful for viewing the phase relationship between two signals, which is commonly performed in radio and television engineering. When both sinusoid signals are different frequencies and phases, the resulting track is called the Lissajous curve.

Some oscilloscopes have cursors, which are lines that can be moved around the screen to measure the time interval between two points, or the difference between two voltages.

Most oscilloscopes have two or more input channels, allowing them to display more than one input signal on the screen. Usually Oscilloscope has a separate set of vertical controls for each channel, but only one trigger system and time base.

The double base oscilloscope has two trigger systems, so two signals can be viewed on different timing. This is alsoknown as the "magnification" mode. The user captures the desired, complex signal using the appropriate shutter setting. It then allows the function of "magnification", "zoom" or "dual time base" and can move the window and look at the details of the complex signal.

Sometimes an event that the user wants to see can only occasionally occur. To capture these events, some oscilloscopes are "storage ranges" that maintain the latest sweeping on the screen.

Some digital oscilloscopes can sweep at speed as slowly as once an hour, imitating the graph recorder. This means that the signal moves through the screen from the right to left. Most decorative oscilloscope moves from sweeping to the strip mode directly around one sweeping in ten seconds. This is because the other, the range looks broken: it collects data, but the dot cannot be seen.