This set of Analog Communications Multiple Choice Questions & Answers (MCQs) focuses on “Linear Modulation”. 1. Discone antenna is mainly used in UHF range. a) True b) False 2. Squelch circuit is normally inserted in receiver ________ a) after detector b) before detector c) before mixer d) after power amplifier 3. Each frequency gives rise … Read more
This set of Analog Communications Multiple Choice Questions & Answers (MCQs) focuses on “Envelope Detector”. 1. Envelope Detector is a/an ________ a) Coherent detector b) Asynchronous Detector c) Synchronous Detector d) Product Demodulator 2. Effective radiated power (ERP) is equal to ________ a) Pt×Gt×Pd b) Pt×Pd c) Gt×Pd d) Pt×Gt 3. Power density from an … Read more
This set of Analog Communications Questions and Answers for Entrance exams focuses on “Generation of AM Using Amplifiers”. 1. Consider a wave, v = 15 sin (3πt + 5sin1300t), what is the carrier and signal frequency? a) 2.5Hz and 200Hz b) 1.5Hz and 100Hz c) 1.5Hz and 207Hz d) 5.5Hz and 500Hz 2. SWR is … Read more
This set of Analog Communications Interview Questions and Answers focuses on “Modulation Using Non-Linear Devices (Balanced Modulator)”. 1. The approximate aspect ratio for television is ________ a) 2 : 1 b) 3 : 2 c) 4 : 3 d) 3 : 4 2. Signal to Noise ratio for a hi-fi system is equal to ________ … Read more
This set of Analog Communications Multiple Choice Questions & Answers (MCQs) focuses on “Spectrum of Multitone Signal”. 1. Video signals are transmitted through ________ a) Frequency Modulation b) Amplitude Modulation c) Pulse Modulation d) Either frequency or amplitude modulation 2. What you understand by the term discone antenna? a) combination of disc and cone b) … Read more
This set of Analog Communications Multiple Choice Questions & Answers (MCQs) focuses on “Power Calculation”. 1. If peak voltage of a carrier wave is 10V, what is the peak voltage of modulating signal if modulation index is 50%? a) 10V b) 20V c) 8V d) 5V 2. Maximum Amplitude of an amplitude modulated 10V and … Read more
This set of Analog Communications Multiple Choice Questions & Answers (MCQs) focuses on “Methods of Reducing Distortion”. 1. Quantization error occurs in ________ a) Time Division Multiplexing b) Frequency Division Multiplexing c) Pulse Code Modulation d) Pulse Width Modulation 2. If power transmitted is 90kW, what is the field at a distance of 45km? a) … Read more
This set of Analog Communications Multiple Choice Questions & Answers (MCQs) focuses on “FDM System”. 1. Frequency difference between WDM (Wavelength Division Multiplexing) and FDM (Frequency Division Multiplexing) is ________ a) 1 b) 0 c) slightly greater than 1 d) infinity 2. FDM stands for ________ a) Frequency Density Multiplexing b) Frequency Difference Multiplexing c) … Read more
This set of Analog Communications Multiple Choice Questions & Answers (MCQs) focuses on “Problems of AM”. 1. If the modulating frequency of a carrier wave varies between 700Hz and 7KHz, find it’s bandwidth? a) 10 KHz b) 23 KHz c) 17.3 KHz d) 12.6 KHz 2. A 400W carrier wave is modulated to a depth … Read more
This set of Analog Communications Multiple Choice Questions & Answers (MCQs) focuses on “Detection of AM Waves”. 1. Detection is same as ________ a) Modulation b) Mixing c) Filtering d) Demodulation 2. Most commonly used modulation system for telegraphy is ________ a) Multi-tone modulation b) Single tone modulation c) PCM d) FSK 3. What do … Read more
