Exam 18: Communication Devices and Methods

In an FM receiver, recovery of the signal is done with the limiter.

Figure 2 Block diagram for an FM radio receiver -Refer to Figure 2. The block with the ? represents the

The purpose of AGC is to

The output of an AM demodulator is only the audio signal.

In an AM or FM receiver, the local oscillator is tuned to the

The RF amplifier in both AM and FM receivers is tuned to

Before a phase- locked loop (PLL)is locked the VCO is said to be

In a balanced AM modulator there is

In an AM receiver, the input signal to the IF amplifier will have

In an AM receiver, the output signal from the IF amplifier will have

In an AM receiver, the local oscillator generates a 455 kHz frequency.

In a phase- locked loop, the phase- detector output is an error voltage.

The process of modifying a high frequency carrier by a low frequency signal is called

Figure 3 -Refer to Figure 3. This circuit is a basic

To recover the audio from an AM signal, the receiver uses

Both AM and FM receivers have a

In an AM receiver, the IF amplifier is designed for a single frequency.

When a phase- locked loop is used as an FM demodulator, the output is the same as the

When a phase- locked loop is locked, the difference frequency (fi - f0)is

A linear four- quadrant multiplier can basically