1). What is called an analog signal?
An analog signal generally corresponds to linearity. Analog systems are utilized when the output levels of either current or voltage have to be proportional as per input values.
These systems have unlimited variability in nature.
It is time-varying and generally bound to a range (e.g. +24V to -24V), but there is an infinite number of values within that continuous range.
An analog signal uses a given property of the medium to convey the signal’s information, such as electricity moving through a wire.
In an electrical signal, the voltage, current, or frequency of the signal may be varied to represent the information.
When plotted on a voltage vs. time graph, an analog signal should produce a smooth and continuous curve. There should not be any discrete value changes.
2). What are the benefits of analog signal?
* Analog signal is easier to process.
* Analog signal best suited for audio and video transmission.
* Analog signal is more accurate as it has much higher density, and can present more refined information.
* Analog signal use less bandwidth than digital signals.
So Flexibility with bandwidth is good.
* Analog signal provide a more accurate representation of changes in physical phenomena, such as sound, light, temperature, position, or pressure.
* Analog Signal has less distortion as it has less sensitive in terms of electrical tolerance.
* Analog Signal has great lifespan and, ambient weather dependencies are low.
* Analog Signal is easy to handle not expensive, over-sensitive routings.
* And also, Analog Signal has extensive performance even in high load conditions.
3). What are the disadvantages of analog signal?
* High cost of signal conversion inside the display
* Upgrade to digital interface not possible.
* No security for transmission data.
* Needed perfect receiver and Transmitter for specific communication scenario.
* If you move into a new system and you want to change the analog signal you need to tune or change both reciver and Transmitter.
* Data transmission at long distances may result in undesirable signal disturbances.
* Analog signal is prone to generation loss.
* Analog signals are generally lower quality signals than digital signals.