A receivers sensitivity is its:
  1. ability to pick up and make weak signals audible 2. ability to separate signals close in frequency 3. method of detection of received signals 4. measured power of the audio amplifier

Of two receivers, the one capable of receiving the weakest signal would have:
1. an RF gain control 2. the least internally generated noise 3. the loudest audio output 4. the greatest tuning range

Selectivity in a superhet communications receiver
is achieved primarily in the:
1. RF amplifier 2. mixer 3. IF amplifier 4. audio stage

The ability of a receiver to separate signals
close in frequency is called its:
1. noise figure 2. sensitivity 3. bandwidth 4. selectivity

One important application for diodes is recovering
information from transmitted signals. This is referred to as:
1. biasing 2. rejuvenation 3. ionization 4. demodulation

Which two stages of a superhetrodyne receiver
have tuned input circuits tuned to the same frequency:
1. RF and IF 2. IF and local oscillator 3. RF and first mixer 4. RF and local oscillator

A superhetrodyne receiver receives an incoming signal of 3540 khz and the local oscillator produces a signal of 3995 khz. To which frequency should the IF be tuned:
1. 455 khz 2. 3540 khz 3. 3995 khz 4. 7435 khz

A superhet receiver designed for SSB reception must
have a BFO (beat frequency oscillator) because:
1. the suppressed carrier must be replaced for detection 2. it phases out the unwanted sideband signal 3. it reduces the passband of the IF stages 4. it beats with the received carrier to produce the other sideband

An audio amplifier is necessary in a communications receiver because:
1. signals leaving the detector are too weak 2. the carier frequency must be replaced 3. the signal requires demodulation 4. RF vibrations are not heard by the human ear

The AGC circuit in a receiver is usually applied to:
1. the audio stage 2. the mixer stage 3. the power supply 4. RF and IF stages