American Standard Code for Information Interchange has 128 characters, which are binary coded. If a certain computer generates 1,000,000 character per second; then minimum bandwidth required to transmit this signal will be

1.  1.4 M bits/sec

2.   14 M bits/sec

3.  7 M bite/Sec

4.  0.7 M bite/sec

View Answer  
4
Correct Answer :

7 M bite/Sec


Explanation :
No Explanation available for this question

A binary channel with capacity 36k bits/sec is available for PCM voic transmission. If signal is band limited to 3.2 kHz, then appropriate values of quantizing level L and sampling frequency respectively will be

1.  32, 3.6 kHz

2.   64.7, 7.2 kHz

3.   64, 3.6 kHz

4.  32, 7.2 kHz

View Answer  
4
Correct Answer :

32, 7.2 kHz


Explanation :
No Explanation available for this question

Good voice reproduction via. PCM requires .128 quantization levels. If bandwidth of voice channel is 4 kHz, then data rate is

1.  256 kbps

2.  128 kbps

3.  56 kbps

4.   28 kbps

View Answer  
4
Correct Answer :

56 kbps


Explanation :
No Explanation available for this question

A TDM link has 20signal channel 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

1.  1180 M bits/sec

2.  1380 K bits/sec

3.  1180 M bits/sec

4.  1280 M bits/sec

View Answer  
4
Correct Answer :

1180 M bits/sec


Explanation :
No Explanation available for this question

For a PCM signal, if compression parameter noiseµ is 100 and minimum signal to quantization ratio is 50 dB, then number of bits per sample would be

1.  8

2.  10

3.  12

4.  14

View Answer  
4
Correct Answer :

10


Explanation :
No Explanation available for this question

A message signal band limited to 5kHz is sampled at the minimum rate as directly by the sampling theorem. The number of quantisation levels is 64. If sample are encoded in binary form, then transmission rate is

1.  60 kbps

2.  50 kbps

3.  32 kbps

4.  10kbps

View Answer  
4
Correct Answer :

60 kbps


Explanation :
No Explanation available for this question

If peak transmitted power in a radar system is increased by a factor of 81, then maximum range .11 be increased by a factor of

1.  3

2.   9

3.  27

4.  51

View Answer  
4
Correct Answer :

3


Explanation :
No Explanation available for this question

A PCM system uses a uniform quantizer followed by a 8-bit encoder. The bit rate of the system is equal to  108 bits/s. The maximum message bandwidth for which the system operates satisfactorily is

1.  25 MHz

2.  6.25 MHz

3.  12.5 MHz

4.  50 MHz

View Answer  
4
Correct Answer :

6.25 MHz


Explanation :
No Explanation available for this question

A binary channel with capacity 36 k bits/sec is available for PCM voice transmission. If signal is band limited .3.2 kHz, then appropriate values of quantizing level L and sampling frequency respectively will be

1.  32, 3.6 kHz

2.  64, 72 kHz

3.   64, 3.6 kHz

4.  32, 7.2 kHz

View Answer  
4
Correct Answer :

32, 7.2 kHz


Explanation :
No Explanation available for this question

Twenty-four r voice signals are sampled uniformly at rate of 8 kHz and, then time-division multiplexed. The sampling process uses flat-top samples with 1 µs duration. The multiplexing operation includes provision for synchronization by adding and  extra pulse of 1 µs duration . The spacing between successive pulses of the multiplexed signal is

1.  4 µs

2.  4 µs

3.  7.2 µs

4.  8.4 µs

View Answer  
4
Correct Answer :

4 µs


Explanation :
No Explanation available for this question
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