Frequency Shift Keying Question & Answers November 5, 2022 By WatElectronics This article lists 20 Frequency Shift Keying MCQs for engineering students. All the Frequency Shift Keying Questions & Answers given below include a hint and a link wherever possible to the relevant topic. This is helpful for users who are preparing for their exams, or interviews, or professionals who would like to brush up on the fundamentals of Frequency Shift Keying. Discrete signals are utilized in transmitting digitized signals and a method involved in such purpose is Frequency Shift Keying. Earlier modems in computers used Frequency shift keying to achieve a baud rate up to 1200, for call signaling FSKs used in second generations of cellular technology. After the bandwidths required reaches a certain point or rate FSKs considered to be inefficient. The simplest form of FSK is BFSK (Binary Frequency Shift Keying). Binary information i.e., 0 & 1 transmitted in BFSK. 1 in BFSK is referred to as Mark frequency and Space frequency is 0. FSKS operating with multiple frequencies i.e., discrete is referred to as MFSK (Multiple Frequency Shift Keying). M-ary Orthogonal modulation is used in MFSK for simultaneous transmission of more than two bits. Despite limited bandwidth in FSK, it can be used in lower bandwidth applications where the highest reliability transportation is a major concern. Higher rates of throughput replaced FSKs by various techniques of Digital modulation are Amplitude-shift Keying, Phase-shift Keying, and Quadrature Amplitude Modulation. 1). Which of these belongs to the category of Digital Modulation? Phase Modulation Amplitude Modulation Frequency Shift Keying Frequency Modulation None Hint 2). How many frequencies are involved in FSK signals? One Two More Than One More Than Two None Hint 3). What gets shifted in the signals involved in Frequency Shift Keying? Amplitude Frequency Phase a & b None Hint 4). FSK carrier’s amplitude & phase are ______________? Varying Constant Dynamic Varied Accordance to Input None Hint 5). How many correlators can be used for Coherent detection of FSK? Four Three Two One None Hint Frequency Shift Keying MCQs for Quiz 6). What is tuned in ‘non-coherent detection of FSKs’ at distinct frequencies? Low Pass Filter High Pass Filter Band Pass Filter Band Rejection Filter None Hint 7). In BFSKs __________ represent high frequency of carrier signals? Binary 1 Binary 0 Neither a nor b a & b None Hint 8). How BFSKs bandwidth related to BPSK? Higher Than Lesser Than Equal To Greater and Equal To None Hint 9). What does an Asynchronous detector of FSK consists? Band Pass Filter Envelope Detector Decision Circuit All Mentioned Above None Hint 10). FSKs reception can be _____________? Amplitude Coherent Phase Non-coherent Phase Coherent Phase Coherent & Non-coherent None Hint Frequency Shift Keying MCQs for Students 11). What is measured in ‘Non-coherent FSKs reception’? Phase Power Frequency Energy None Hint 12). Continuous FSK have no discontinuities of _____________? Time Amplitude Phase Frequency None Hint 13). Which of these digitized techniques of modulations can be decoded based on ‘non-coherent detection’? BPSK APSK BFSK QAM None Hint 14). Telegraphy prefers ____________? ON-OFF Keying FSK PSK ASK None Hint 15). Which of these have Low Probability of Error? ON-OFF Keying FSK PSK ASK None Hint Frequency Shift Keying MCQs for Interviews 16). FSK signals are robust to _____________? Phase Distortions Frequency Distortions Amplitude Distortions Time Distortions None Hint 17). GSM cellular networks uses ___________? ON-OFF Keying FSK PSK ASK None Hint 18). What are the various advantages of FSK? Immunity to Noise Simple Transmission Long-distance Transmission All Mentioned Above None Hint 19). Which of these have inefficient bandwidths? ON-OFF Keying FSK PSK ASK None Hint 20). What are the various methods involved in FSKs demodulation? Synchronous Symmetric Asynchronous a & b None Hint For More MCQs Pulse Width Modulation Question & Answers Phase Modulation Question & Answers Digital Modulation Question & Answers Demodulation Question & Answers Sampling Theory and Pulse Modulation Question & Answers Frequency Modulation Question & Answers Amplitude Modulation Question & Answers Modulation Question & Answers Pulse Code Modulation Question & Answers Please fill in the comment box below. Time's up
