Site MapHelpFeedbackTrue or False
True or False
(See related pages)

1
Radio receivers must provide the sensitivity and selectivity that permit full recovery of the original intelligence signal.
A)True
B)False
2
Selectivity in a receiver is obtained by using tuned circuits and/or filters.
A)True
B)False
3
The optimum bandwidth is wide enough to pass the signal and its sidebands but narrow enough to greatly attenuate signals on adjacent frequencies.
A)True
B)False
4
A communication receiver’s selectivity is mainly a function of overall gain.
A)True
B)False
5
Bit error rate is the number of errors made in the transmission of many parallel data bits.
A)True
B)False
6
The main problem with superheterodyne receivers lies in tracking the tuned circuits.
A)True
B)False
7
Superheterodyne receivers convert all incoming signals to a lower frequency known as the intermediate frequency.
A)True
B)False
8
In superheterodyne receivers, the local oscillator acts like a simple amplitude modulator to produce sum and difference frequencies.
A)True
B)False
9
MOSFETs and hot carrier diodes are generally used as mixers because of their low noise characteristics.
A)True
B)False
10
AGC circuits help maintain a constant output voltage level over a wide range of RF input signal levels.
A)True
B)False
11
Noise that contains all frequencies and varies randomly is known as white noise.
A)True
B)False
12
Internal noise is typically produced by motors and generators.
A)True
B)False
13
Filtered or band-limited noise is referred to as pink noise.
A)True
B)False
14
Flicker noise is also referred to as excess noise and occurs in semiconductors, resistors, and conductors.
A)True
B)False
15
Distortion refers to the harmonics present in a signal caused by nonlinearities.
A)True
B)False





To learn more about the book this website supports, please visit its Information Center.
(c)2008 Tata McGraw-Hill
Any use is subject to the Terms of Use and Privacy Policy.
Tata McGraw-Hill is one of the many fine businesses ofThe McGraw-Hill Companies.


Frenzel Louis E.Online Learning Center

Home > Chapter 9 > True or False