1.
PCM is the type of analog modulation
Answer : False
2.
RJ45 connector is used for LAN
Answer
: True
3. A
signal having frequency 1KHz is used modulate the carrier signal with frequency
1MHz and amplitude twice of the signal. The modulated signal will be
Answer:
Under modulated
4.
The HLR has information of
Answer
: Local subscriber
5.
frequency modulation is
Answer
: Changing the frequency of the carrier with respect to the amplitude of
information signal
6.
The bandwidth of the AM signal is
Answer
: 2Fm
7.
The telephone traffic has ___ Distribution
Answer
: Poisson
8.
Which of the following is not a pulse modulation
Answer
: PCM
9.
For a signal 4*sin*1540t, the minimum sampling frequency required will be
Answer
: 490.19Hz
10.
What is modulation
Answer
: Shifting the information signal to the carrier frequency
11.
Which of the following devices is used to generate AM waves?
Answer
: Square-law modulator
12.
For getting 100% modulation, carrier amplitude should ________
Answer
: be equal to signal amplitude
13.
The biggest disadvantage of PCM is—
Answer
: The large bandwidths that are required for it
14.
Indicate which of the following pulse modulation systems is analog?
Answer
: PWM
15.
The modulation system inherently most noise-resistant is—
Answer
: Pulse-code modulation
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