EST
Signal and Communication Systems Quiz
Test your knowledge on signal processing, communication systems, and related technologies with our engaging quiz! Designed for both enthusiasts and professionals, this quiz covers a range of topics including modulation techniques, fiber optics, and network protocols.
- 25 challenging multiple-choice questions
- Evaluate your understanding of key concepts
- Ideal for students and practitioners in the field
Which of the following is the impulse response of FIR filter?
Infinite
Finite
Zero
Negative
As the wavelength increases, the frequency _____.
Adding
Multiplying
Increasing
Decreasing
This type of overmodulation creates spurious frequencies known as _______, which cause the modulated signal to have increased bandwidth.
Eye pattern
Splatter
Disturtion
Interference
In _________, only one bit is transmitted per sample. That bit is a one if the current sample is more positive than the previous sample, zero if the current sample is more negative.
Pulse Code Modulation
Delta Modulation
Adaptive Delta Modulation
Vocoders
Which is not belong to the group?
Amplitude Modulation
Amplitude Shift Keying
Frequency Modulation
Phase Modulation
It is use of two or more RF channels to transmit the same information, usually done to avoid fading
Space diversity
Polarization diversity
Frequency Diversity
Time diversity
It is the ability of a receiver to discriminate against unwanted signals and noise
Efficiency
Sensitivity
Selectivity
Synthesizer
The power of a signal is 10 mW and the power of the noise is 1 uW; what is the value of SNR(dB)?
20
30
50
40
A network with bandwidth of 10 Mbps can pass only an average of 12,000 frames per minute with each frame carrying an average of 10,000 bits. What is the throughput of this network in Mbps?
2
4
8
6
If a periodic signal is decomposed into five sine waves with frequencies of 100, 300, 500, 700, and 900 Hz, what is its bandwidth in Hz?
200
100
800
1200
For a single-mode optical cable with 0.25-dB/km loss, determine the optical power 100 km from a 0.1-mW light source.
-45 dBm
-25 dBm
-35 dBm
-65 dBm
An FDAS component that can be individually identified of its status or used to individually control other function.
Addressable Fire Detection and Alarm System
Non Addressable Fire Detection and Alarm System
Conventional Fire Detection and Alarm System
Semi Conventional Fire Detection and Alarm System
Which topology requires a multipoint connection?
Bus
Star
Mesh
Ring
In computer networking classful addressing is important as it gives as millions of network addresses. Given that IP address 224-224.224.224 identify what classful address this numbers belong.
Class A
Class B
Class C
Class D
For sky-wave propagation, which highest frequency can be used for communications between two locations at a given angle of incidence and time of day.
UHF
MUF
FOT
OFW
An antenna has an impedance of 40 V. An unmodulated AM signal produces a current of 4.8 A. The modulation is 90 percent. Calculate the total power.
1395 W
1435 W
1295 W
1465 W
A signal wave with velocity of 360,000 feet per second has a frequency of 4,400 Hz. What is the wavelength of the signal in meters.
29.53
82.00
4.99
24.99
In a 50/125 graded-index multimode fiber optic cable, 50 refers to the diameter of fiber cable's ____ ___
Inner cladding
Outer cladding
Core
Braid
Which line coding format binary 0 represents by no pulses and binary 1 represented by a positive pulse?
NRZ bipolar format
RZ bipolar format
NRZ unipolar format
Manchester format
Which of the following transmission line losses that describes a transmission lines act as antennas when the separation distance between the conductors is very small as compared to their wavelength.
Copper loss
Dielectric loss
Radiation loss
Corona
Determine the free space path loss for a 3.4 GHz signal propagating 20000 m.
156.10 dBm
162.09 dBm
140.08 dBm
129.09 dBm
If 16-QAM is four bits per baud, how many bits per baud do a 256-QAM represents
128
64
32
8
In what values are RF feed line losses expressed?
Ohms per MHz
DB per MHz
Ohms per metre
DB per unit length
What may happen if an SSB transmitter is operated with the microphone gain set too high?
It may cause splatter interference to other stations operating near its frequency
It may cause interference to other stations operating on a higher frequency band
It may cause atmospheric interference in the air around the antenna
It may cause digital interference to computer equipment
A line-of-sight radio link operated at frequency of 4 GHz has a separation distance of 50 km between antennas. Calculate the radius of the first Fresnel zone
30.58 m
18.35 m
50.38 m
15.85 m
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