Exam 6: Receivers

What principle does the synchronous detector rely on?

_______________ is the process of stepping down the RF signal to a first,relatively high IF frequency and then mixing down again to a second,lower,final IF frequency.

What type of detector is a circuit designed to respond only to frequency changes of the input signal?

Which of the following quantifies how the received signal is impaired by both noise voltages and distortion components?

What is one of the great advantages of the diode (envelope)detector?

What is one advantage of the direct-conversion architecture?

Which of the following silences the audio amplifier stages until a carrier is detected?

What is the name for the additional signal used to transmit music programming that is usually commercial-free but paid for by subscription?

Which of the following is responsible for the image frequency rejection characteristics of the receiver?

What is the key to the superior selectivity of the superheterodyne receiver?

What is created in a receiver with reception of electromagnetic interference (EMI)?

An essential function within any receiver is some form of ____________.

A __________ function in an FM receiver is to remove any residual amplitude modulation and the amplitude variations resulting from noise.

Why is amplification with an antenna?

___________ are used in the vast majority of AM detection schemes where the carrier and sidebands are present.

What technique is used to obtain variable selectivity?

The ___________ of an amplifier or receiver is the input power range over which it provides a useful output.

A receiver's _________ is the extent to which a receiver is capable of differentiating between the desired signal and unwanted radio signals and noise.

A receiver's ________ is the minimum input signal,expressed as a voltage,required to produce a specified output.

Many communications receivers are equipped with a(n)____________ that provides a visual indication of received signal strength.