Fill in the Blanks


1		Noise containing frequencies and varying randomly is known as white noise.


2		Electronic components in a receiver such as resistors, diodes, and transistors are major sources of noise.


3		Flicker noise is the result of minute random variations of in semiconductor material.


4		Intermodulation distortion results from the generation of new signals and harmonics caused by circuit .


5		The noise factor is the ratio of the power at the input to the S/N power at the output.


6		Distortion refers to the present in a signal caused by nonlinearities.


7		is the science of the behavior at extremely low temperatures or temperatures approaching absolute zero.


8		The amplifier, also called a low-noise amplifier processes the very weak input signals, increasing their amplitude prior to mixing.


9		amplifiers are tuned class A amplifiers capable of providing a gain in the 10- to 30-dB range.


10		One technique used to the bandwidth of an IF amplifier is to connect resistors across the parallel tuned circuits.


11		One or more of the IF amplifier stages used to remove any amplitude variations on the FM signal before the signal is applied to the demodulator is the .


12		Automatic gain controls are used so that the overall receiver gain does not interfere with the receiver’s ability to handle signals.


13		The circuit is used to keep the receiver audio turned off until an RF signal appears at the receiver input.


14		receivers use the beat frequency oscillator to recover transmitted information.


15		Two-way radio communication equipment is packaged so that both transmitter and receiver are in a unit known as a(n) .

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