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A message signal of frequency 10 kHz and peak voltage 10 V is used to modulate a carrier wave of frequency 1 MHz and peak voltage 20 V. If the modulation index is 0.5, what is the peak voltage of the upper sideband?
2.5 V
5 V
10 V
20 V
A message signal of frequency 10 kHz and peak voltage of 10 V is used to modulate a carrier of frequency 1 MHz and peak voltage of 20 V. What is the modulation index?
0.2
0.5
2.0
1.0
Identify the incorrect statement from the following
detectionย is carried out using a rectifier and an envelop detector
Pulse Position denotes the time of rise or fall of the pulse amplitude
Modulation index ฮผ is kept โฅ1, to avoid distortion
Facsimile (FAX) scans the contents of the document to create electronic signals
The modulation index of a FM signal is 0.25. If modulating frequency is 2kHz, the maximum derivative in frequency would be
500 Hz
1000 Hz
1500 Hz
500 kHz
If and are carrier and modulating signals respectively, The modulation index isย
56%
30%
50%
48%
The maximum peak to peak voltage of an AM wire is 24 mV and the minimum peak to peak voltage is 8 mV. The modulation factor is
10%
20%
25%
50%
A carrier frequency of 1MHz and peak value of 10V is amplitude modulated with a signal frequency of 10 kHz with peak value of 0.5 V. Then the modulation index and the side band frequencies respectively are
0.05 and
0.5 and
0.05 and
0.5 and
The antenna current of an AM transmitter is 8 A when only the carrier is sent, but it increases to 8.93 A when the carrier is modulated by single sine wave. Find the percentage modulation.
50%
60.18%
70.15%
85.32%
The antenna current of an AM transmitter is 8 A when only the carrier is sent, but it increases to 8.93 A when the carrier is modulated by single sine wave. Find the percentage modulation.
60.10%
70.10%
80.10%
50.10%
