Following the previous question, indicate which of the following signals are digital signals.
previous question?
what following?
To determine whether a signal is digital or not, you need to understand the characteristics of a digital signal. A digital signal is a discrete-time, discrete-amplitude signal that only takes on a limited number of distinct values. It is represented using binary digits, commonly known as bits, and can only have two possible states: 0 or 1.
Now, let's go through the list of signals and identify which ones are digital:
1. Morse Code: Morse code is a system of representing letters and numbers using a combination of dots and dashes. It is not a digital signal because it uses a continuous waveform to represent different characters.
2. Mobile phone audio signal: When you make a phone call, the audio signal transmitted over the mobile network is typically digital. However, once it reaches the mobile phone speaker, it is converted into an analog audio signal. So, the mobile phone audio signal itself is not a digital signal.
3. Analog clock ticking sound: An analog clock ticking sound is a continuous waveform generated by the mechanical movement of the clock's gears and hands. Hence, it is not a digital signal.
4. Binary data on a computer hard drive: Binary data is the foundation of digital information storage and processing. It consists of sequences of 0s and 1s, representing various types of data. Therefore, binary data on a computer hard drive is a digital signal.
5. Blurred image: An image, whether it is blurred or not, consists of continuous visual information. It is typically represented by continuous analog signals such as those captured by cameras or displayed on screens. So, a blurred image is not a digital signal.
In summary, out of the given signals, binary data on a computer hard drive is the only one that is a digital signal. The others do not exhibit the discrete, binary characteristics of digital signals.