The main function of a balanced modulator is to
A). Produce balanced modulation of a carrier wave
B). Produce 100% modulation
C). Suppress carrier signal in order to create a single-sideband or double sideband
D). Limit noise picked by a receiver
For telegraphy the most commonly used modulation system is
A). FSK
B). Two tone modulation
C). PCM
D). Single tone modulation
Average value of a sine wave is 0.707 times the peak value.
A). True
B). False
A sine wave with an rms value of 12 V is riding on a dc level of 18 V. The maximum value of the resulting waveform is
A). 6 V
B). 30 V
C). 35 V
D). 0 V
The conductive loop on the rotor of a simple two-pole, single-phase generator rotates at a rate of 400 rps. The frequency of the induced output voltage is
A). 40 Hz
B). 100 Hz
C). 400 Hz
D). Indeterminable