In this article we will discuss about the CRO working and application . we will also learn about the main working and application.
CRO Working and application
The oscilloscope is an electronic measuring device which provides a visual presentation of any wave form applied to the input terminals.
Cathode Ray tube (CRT) like a television tube provides the visual display of the signal applied as a waveform on the front screen. It is also known as cathode Tay oscilloscope (CRO).
Block Diagram of CRO
For better understand CRO working and application we need to know about the block diagram of CRO.
Block Diagram of CRO
For knowing about CRO working and application we required to also know about the block diagram of CRO.
The Block diagram of CRO is shown below. It consists of various elements which must be known to us to understand the proper functioning of CRO.
The input signal should be attenuated to a suitable magnitude beforeit is applied to the amplifier. The attenuators are employed at the input of both vertical and horizontal amplifiers.
The amplifiers of an oscilloscope consist of a vertical amplifier and a horizontal amplifier. The vertical amplifiers amplify the vertical input signal before it is applied to the Y-plates. The horizontal amplifier amplifies the signal, before it is connected to the X-plates.
3. Saw-tooth Generator
For better know about CRO working and application we required to know about Saw-tooth generator.
The measuring signal of any shape is connected to the Y-input (plates) and then it appears on the screen. The signal on X-plates should be such that the image on the screen is similar to that on the Y-plates. Hence, a saw tooth signal is required to be connected to the x-plates which make the image on the screen like the signal connected at the vertical plate.
The saw-tooth signal is called the time base signal, and is produced by the saw-tooth generator. The shape of the saw-tooth signal is shown in figure. The time base signal consists of trace, retrace and hood-off period.
4. Gate Amplifier or Z-amplifier
It is desirable that the image seen on the screen of the CRT must be continuous. The electron beam is desired to appear only in the trace period of the time base signal. The retrace period of the electron beam must not be visible on the screen. Therefore, the gate amplifier is required to control the electron beam in order that it’s appears only in the trace period. It is very important for CRO working and application.
5. Trigger (Gate Amplifier Output)
As mentioned earlier, the measuring signal waveform is connected to Y-input, which appears on the screen.
In order to make the waveform stationary on the screen, it is required that the starting point of the time base signal has to be fixed related to the signal connected to the Y-input. This is known as synchronization.
There are three forms of triggering in an oscilloscope. For better know about CRO working and application we need to know about this.
1. Internal triggering
The signal which is supplied to the trigger is the internal signal of the CRO produced by using the signal form the vertical input signal.
2. External triggering
The signal which is supplied to the trigger is the external signal, produced by using the signal from the external synchronous.
3. Line Triggering
The signal which is supplied to the trigger is the signal from the power supply of CRO (not shown).
Switches are provided to select the form of triggers as required. In a CRO, suitable timing can be selected that causes the image on the screen to be stationary.
Application of CRO
1. Measurement of current
2. Measurement of voltage
3. Measurement of frequency
4. Measurement of inductance
5. Measurement of admittance
6. Measurement of power factor
7. Measurement of resistance.
Hence it is the main CRO working and application. If you will find any incorrect above please comment below in comment box.
For knowing more about the CRO working and application you must watch this video.