Radio Receivers Questions

• In a broadcast superheterodynes receiver having no RF amplifier, the loaded Q of the antenna coupling circuit is 100. If the intermediate frequency is 455 kHz. The rejection ratio at 25 MHz will be
• A notch filter is sometimes used in communication receivers to
• Which one of the following is not a useful quantity for comparing the noise performance of receivers?
• The noise produced by a resistor is proportional to
• The noise generated by a resistor depends upon
• Transistor are free from which type of noise?
• Which of the following is used to provide tracking between RF amplifier and local oscillator stages of receiver?
• The selectivity of most receivers is determined largely by
• EM 84 tube is used in radio receivers as
• Which are the popular IF frequencies for microwave and radar receivers operating on frequencies in the range 1 to 10 GHz
• Which of the following statement about the advantage of phase discriminator over the slope detector is false?
• High IF in a superheat receiver
• Which of the following noise becomes of great importance at high frequencies?
• The image frequency of a superheterodyne receiver is
• In a radio receiver
• In a receiver, at higher frequencies
• The IF stage of a receiver employs
• In an FM signal, the power
• A trimmer is basically a
• In radio receiver, the maximum contribution to noise is from