Communications

For high-index signal, a method of determining the bandwidth is called ________ approach

The primary disadvantage of FM is its

The highest side frequencies from one channel are allowed to spill over into adjacent channels producing an interference known as _________

The primary disadvantage of direct PM

A circuit that compares the frequency of the noncrystal carrier oscillator to a crystal reference oscillator and then produces a correction voltage proportional to the difference between the two frequencies

In FM receivers, which of the ff rejects the image frequency?

In FM receivers, which of the ff provides most gain and selectivity of the receiver?

The final IF amplifier in FM receivers is sometimes called ___________

It is simply two-single ended slope detectors connected in parallel and fed 180 degrees out of phase

Which of the ff tuned-circuit frequency discriminator is relatively immune to amplitude variations in its input signal?

In FM demodulators, it is also called coincidence detector

In FM receivers, limiters produce a constant-amplitude output of all signals above a prescribed minimum input level called ___________

A crystal oscillator whose frequency can be changed by an input voltage is called _______

Which of the ff frequency demodulators requires an input limiter?

Provides a slight automatic control over the local oscillator circuit and compensates for its drift that would otherwise cause a station to become detuned

_______ of an FM receiver is the minimum dB difference signal strength between two received signals necessary for the capture effect to suppress the weaker signal

When two limiter stages are used, this is called _______

One of the prominent advantage of FM over PM is

Each speaker assembly at the receiver reproduces exactly the same information

In a pulse averaging discriminator, the pulses are produced by an