Category: Telecommunication Systems
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What is the difference between Broadband and Baseband Transmission?
Broadband transmission is used for a network in which information is modulated onto a radio frequency carrier which passes through the transmission medium such as a coaxial cable. Broadband transmission allows a number of modulated radio frequency carriers to be … Read more
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Tuned Amplifier Applications
A tuned amplifier operates over a band of frequencies centered on a resonant frequency. Its two main requirements are to provide high gain and good selectivity. We have several applications in telecommunications systems where it is necessary to amplify a … Read more
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Applications of Filters in Telecommunication Systems
Electronic filters have many applications in the telecommunication and data communications industry. For example, they are used in a multichannel communication system employing a technique known as time-division multiplexing (TDM). In this system, several channels are transmitted through a medium … Read more
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Features of FM Receivers
FM receivers employ heterodyne principle. The FM broadcast signals lie in the frequency range between 88 MHz and 108 MHz. The intermediate frequency (IF) of a FM receiver is 10.7 MHz which is much higher than the IF value of … Read more
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Radio Frequency (RF) and Microwave – Multiple Choice Questions & Answers (MCQ3)
The Answers have been provided at the end of Questions. Q1. What is the approximate bandwidth of radio frequency (RF) electromagnetic waves? A. 300 Hz to 300 GHz B. 20 Hz to 20 kHz C. 300 Hz to 3000 … Read more
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RF Power and Voltage Measurement
RF system’s output power level is often the key factor in the design and ultimately the performance of virtually all radio frequency and microwave equipment. For the measurement of average power, a sensor along with a calibrated power meter is … Read more
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Types of AM Radio Receivers
A radio receiver is a device which reproduces the modulated or radio waves into sound waves. The radio receivers used in reproducing amplitude modulated signals are called AM radio receivers. So as to reproduce the AM wave into sound waves, … Read more
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Demodulation in Telecommunication Systems
Demodulation is the process of recovering the audio signal from the modulated wave. Demodulation is also known as detection in communication systems. Why Demodulation is needed in Telecommunication Systems Amplitude modulated wave consists of carrier and sideband frequencies. The audio … Read more
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Modulation in Communication Systems
Introduction Modulation is the process of changing some characteristics (e.g. Amplitude, Frequency, or Phase) of a carrier wave in accordance with the intensity of the message signal. Modulation means to ‘’change’’. In Modulation, some characteristics of the carrier wave … Read more
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RF Scalar and Vector Network Analyzers
The RF network analyzer is an active test instrument which generates a signal that is applied to the device under test, and then it measures the response. Functions of a RF Network Analyzer Signal Separation The signal separation element is … Read more