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MCQ in Modulation Part 4 – Answers

MCQ in Modulation Part 4 | ECE Board Exam

Below are the answers key for the Multiple Choice Questions in Modulation Part 4.

151. Crossmodulation

152. Stray coupling is minimized

153. 4

154. Prevent the generation of spurious oscillations

155. Blocking dynamic range

156. RF amplifier, mixer, IF amplifier, AF amplifier

157. Filter ringing

158. IF amplifier

159. Better signal-to-noise-ratio

160. Low-level modulation

161. Ensuring good RF shielding between the transmitter

162. 3,000 Hz

163. A3C

164. In the receiver front end

165. Installing a filter at the receiver

166. F3E

167. The presence of a strong signal on a nearby frequency

168. Amplitude of the modulating tone and frequency of the carrier

169. Better rejection ratio

170. Bandwidth and noise figure

171. Undesired signals will reach the audio stage

172. FM receiver

173. Prevents any amplitude modulation of the IF signal

174. Loose

175. Multiplied by four

176. 2.4 kHz

177. Resistor

178. Avoid the requirement of neutralizing the stage

179. Rectifies and filters

180. All of these

181. Insulating enclosures around the receiver

182. Television

183. Approximately 1000 W

184. Limiter stage

185. Single sideband, suppressed carrier

186.  Approximately 2.5 to 1

187. Higher

188. Improvement in frequency stability of the oscillator

189. A3F

190. A network consisting of one inductor and two capacitors

191. With a reactance modulator on the oscillator

192. Installing resistive spark plugs

193. Transmitter’s output signal when the modulation is zero

194. Final IF amplifier, which also acts as a limiter stage

195. Discriminator

196. The loudest signal received is the only demodulated signal

197. Modulating the plate voltage of a class-C amplifier

198. High modulating frequencies

199. The modulation of an unwanted signal is heard on the desired signal

200. FM receiver

Questions and Answers in Modulation Series

Following is the list of multiple choice questions in this brand new series:

MCQ in Modulation
PART 1: MCQ from Number 1 – 50                        Answer key: PART 1
PART 2: MCQ from Number 51 – 100                   Answer key: PART 2
PART 3: MCQ from Number 101 – 150                 Answer key: PART 3
PART 4: MCQ from Number 151 – 200                 Answer key: PART 4
PART 5: MCQ from Number 201 – 250                 Answer key: PART 5
PART 6: MCQ from Number 251 – 300                 Answer key: PART 6
PART 7: MCQ from Number 301 – 350                 Answer key: PART 7
PART 8: MCQ from Number 351 – 400                 Answer key: PART 8
PART 9: MCQ from Number 401 – 450                 Answer key: PART 9
PART 10: MCQ from Number 451 – 500                 Answer key: PART 10

Complete List of MCQ in Communications Engineering per topic

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