|
The spectrum of a 500 kilohertz fm modulated carrier has ___
|
|
0
|
210
|
June 8, 2022
|
|
A 50-megahertz fm carrier varies between 49.925 megahertz and ___
|
|
0
|
144
|
June 8, 2022
|
|
Modulation index may be figured by using which of the following formulas?
|
|
0
|
131
|
June 8, 2022
|
|
Frequencies that are located between adjacent channels to ___
|
|
0
|
149
|
June 8, 2022
|
|
An fm transmitter has a 50-watt carrier with no ___
|
|
0
|
118
|
June 8, 2022
|
|
The maximum deviation for a 1.5 MHz carrier is set ___
|
|
0
|
177
|
June 8, 2022
|
|
A 1,000-hertz tone of a certain loudness causes the ___
|
|
0
|
162
|
June 8, 2022
|
|
In an fm signal, (a) the RATE of shift is proportional to what characteristic of ___
|
|
0
|
164
|
June 8, 2022
|
|
The "ratio of transmitted powers" provides what information? c
|
|
0
|
128
|
June 8, 2022
|
|
Fsk has which of the following advantages over cw?
|
|
0
|
155
|
June 8, 2022
|
|
In an fsk transmitter with a doubler and a tripler stage, the desired ___
|
|
0
|
133
|
June 8, 2022
|
|
When the amount of oscillator frequency shift in an fsk transmitter is ___
|
|
0
|
142
|
June 8, 2022
|
|
In an fsk transmitter, what stage is keyed?
|
|
0
|
139
|
June 8, 2022
|
|
Fsk is NOT affected by noise interfecrence for which of the following reasons?
|
|
0
|
132
|
June 8, 2022
|
|
If an fsk transmitter has a MARK frequency of ___
|
|
0
|
145
|
June 8, 2022
|
|
In a frequency-shift keyed signal, where is the intelligence contained?
|
|
0
|
138
|
June 8, 2022
|
|
Frequency-shift keying is generated using which of the following methods?
|
|
0
|
136
|
June 8, 2022
|
|
Frequency-shift keying resembles what type of AM modulation?
|
|
0
|
155
|
June 8, 2022
|
|
In a cathode modulator, the modulating voltage is in series with ___
|
|
0
|
125
|
June 8, 2022
|
|
A cathode modulator is used in which of the following situations?
|
|
0
|
171
|
June 8, 2022
|
|
The control-grid modulator is similar to which of the following modulator circuits?
|
|
0
|
131
|
June 8, 2022
|
|
Compared to a plate modulator, the control-grid modulator has ___
|
|
0
|
113
|
June 8, 2022
|
|
Excessive modulating signal levels have which, if any, of the following effects on ___
|
|
0
|
132
|
June 8, 2022
|
|
Which of the following inputs is/are applied to the grid of a control-grid modulator?
|
|
0
|
167
|
June 8, 2022
|
|
A control-grid modulator would be used in which of the following situations?
|
|
0
|
150
|
June 8, 2022
|
|
Plate- and collector-injection modulators are the most commonly ___
|
|
0
|
162
|
June 8, 2022
|
|
In the collector-injection modulator, af and rf are heterodyned by ___
|
|
0
|
146
|
June 8, 2022
|
|
In a plate modulator, with no modulation, how will the plate ___
|
|
0
|
204
|
June 8, 2022
|
|
To achieve 100-percent modulation in a plate modulator, what maximum ___
|
|
0
|
130
|
June 8, 2022
|
|
A plate modulator produces a modulated rf output by ___
|
|
0
|
134
|
June 8, 2022
|