It is important to observe different signals when you testing for repairing any electronic device. For this reason, we use CRO and DSO. Today we will discuss cathode-ray oscilloscope and digital storage oscilloscope.
CATHODE RAY OSCILLOSCOPE
Cathode ray oscilloscope or CRO is a device used to measure signals like amplitude, frequency, etc.this device made by various devices like cathode ray tube or CRT, vertical amplifier, Delay Line, the Trigger circuit, Time Base Generator Horizontal amplifier, etc.
The Devices used in CRO:-
Cathode Ray Tube
CRT is called the heart of CRO.an electron gun in the. CRO produces an electron beam, which strikes a phosphor hosted screen and great a bright dot/spot of light of the screen which indicates the signal.
Vertical Amplifier
The signal received by CRO in which capacity is not enough. Hence the task of increasing the strength of the signal is performed by Vertical Amplifier.
Delay line
The Delay line is used to delay the signal which goes through the vertical section of CRO.
Without Delay line, one part of the signal is not received to the output. for this device, the signal strikes the vertical deflection plates with a delay.
Trigger Circuit
It is obviously necessary to start horizontal and vertical signals together at the same time. For this reason, the Trigger Circuit is used. Trigger circuit converts the input signal into trigger pulse which used in synchronization.
Time and Base Generator
Time and Base Generator is used to Generate a saw-tooth voltage through which the beam is deflected in the horizontal section. The value of saw-tooth voltage is constant.
Horizontal Amplifier
The saw-tooth voltage which produced by time and base generator has very low strength. Thus the Horizontal Amplifier is used to boost up the sawtooth voltage.
In today's time, we don't use the Cathode Ray Oscilloscope for its antiquity. There is a new Gadgets on Market which we use right now. Digital Storage Oscilloscope is widely used right now.
Now the question is how we can understand the difference between CRO and DSO.
DIGITAL STORAGE OSCILLOSCOPE
The Digital storage oscilloscope was designed to overcome the problem we face by using CRO.
In the DSO the signal indicated in a digital form. For this reason, a conventional cathode ray tube is used which reduces the price of it.
The devices used in DSO:-
A digital storage oscilloscope uses various types of components.
Input Attenuator
input attenuator removes the unwanted signal from the input signal and the necessary signal is sent to the vertical amplifier.
Vertical Amplifier
Vertical Amplifier is used to increasing the strength of the input signal. the required bandwidth of the signal can be gain by this amplifier.
Analog to Digital converter
Digital storage oscilloscope saw a signal in digital form. Thus the analog to digital converter is used to convert the analog signal to digital signal.
Memory
The name of DSO. Mean 'storage' is used for this special feature. By this feature, the obtained signal will store in binary form.
Trigger Circuit
Trigger Circuit is a common device that is used in both CRO and DSO to start the horizontal and vertical signals together.
Cathode Ray Tube
DSO uses a simple cathode ray tube. It has an electron gun inside it which generates an electron ray, which strikes a phosphor-coated screen and generates a bright spot on the screen.
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