Electronic Devices Circuits Digital Transmission Online Exam Quiz
Electronic Devices Circuits Digital Transmission GK Quiz. Question and Answers related to Electronic Devices Circuits Digital Transmission. MCQ (Multiple Choice Questions with answers about Electronic Devices Circuits Digital Transmission
A speech signal has a total duration of 20 sec. It is sampled at the rate of 8 kHz and then PCM encoded. The signal-to-quantization noise ratio is required to be 40 dB. The minimum storage capacity needed to accommodate this signal is
Options
A : 1.12 KBytes
B : 140 KBytes
C : 168 KBytes
D : None of the mentioned
A TDM link has 20 signal channels and each channel is sampled 8000 times/sec. Each sample is represented by seven binary bits and contains an additional bit for synchronization. The total bit rate for the TDM link is
Options
A : 1180 K bits/sec
B : 1280 K bits/sec
C : 1180 M bits/sec
D : 1280 M bits/sec
Analog data having highest harmonic at 30 kHz generated by a sensor has been digitized using 6 level PCM. What will be the rate of digital signal generated?
Options
A : 120 kbps
B : 200 kbps
C : 240 kbps
D : 180 kbps
A linear delta modulator is designed to operate on speech signals limited to 3.4 kHz. The sampling rate is 10 time the Nyquist rate of the speech signal. The step size is 100 m V. The modulator is tested with a this test signal required to avoid slope overload is
Options
A : 2.04 V
B : 1.08 V
C : 4.08 V
D : 2.16 V
A speech signal occupying the bandwidth of 300 Hz to 3 kHz is converted into PCM format for use in digital communication. If the sampling frequency is8 kHz and each sample is quantized into 256 levels, then the output bit the rate will be
Options
A : 3 kb/s
B : 8 kb/s
C : 64 kb/s
D : 256 kb/s
Four signals each band limited to 5 kHz are sampled at twice the Nyquist rate. The resulting PAM samples are transmitted over a single channel after time division multiplexing. The theoretical minimum transmissions bandwidth of the channel should be equal to
Options
A : 5 kHz
B : 20 kHz
C : 40 kHz
D : 80 kHz
Assuming that the signal is quantized to satisfy the condition of previous question and assuming the approximate bandwidth of the signal is W. The minimum required bandwidth for transmission of a binary PCM signal based on this quantization scheme will be
Options
A : 5 W
B : 10 W
C : 20 W
D : None of the mentioned
A sinusoidal massage signal m(t) is transmitted by binary PCM without compression. If the signal to-quantization-noise ratio is required to be at least 48 dB, the minimum number of bits per sample will be
Options
A : 8
B : 10
C : 12
D : 14
Four voice signals. each limited to 4 kHz and sampled at Nyquist rate are converted into binary PCM signal using 256 quantization levels. The bit transmission rate for the time-division multiplexed signal will be
Options
A : 8 kbps
B : 64 kbps
C : 256 kbps
D : 512 kbps
In PCM system, if the quantization levels are increased form 2 to 8, the relative bandwidth requirement will
Options
A : Remain same
B : Be doubled
C : Be tripled
D : Become four times
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