| 1. | In DSB-SC transmission, the frequency which is not transmitted is ? | |
|
The upper side frequency
|
||
|
The lower side frequency
|
||
|
Audio frequency
|
||
|
Carrier frequency
|
||
View Answer
Discuss in Forum
Report Question| 2. | Two carriers of 2 GHz and 4 GHz respectively are frequency modulated by a signal of 10 kHz, such that bandwidth of the FM signal in the two cases are same. The peak deviation in the two cases are in the ratio of ? | |
|
1:8
|
||
|
1:2
|
||
|
2:1
|
||
|
1:1
|
||
| 3. | Phase Modulation is generally not used for transmission because ? | |
|
It needs higher power
|
||
|
It needs large antenna size
|
||
|
It is complex for decoding
|
||
|
It does not carry much information
|
||
| 4. | The noise is more dominant in which of the following ? | |
|
PWM
|
||
|
PAM
|
||
|
PPM
|
||
|
FSK
|
||
| 5. | Types of Angle modulation are ? | |
|
PSK & FSK
|
||
|
Amplitude & Phase
|
||
|
PPM & PWM
|
||
|
FM & PM
|
||
| 6. | PCM is an example of . . . . . . . . . . . . . . conversion ? | |
|
Analog to digital
|
||
|
Digital to digital
|
||
|
Digital to analog
|
||
|
Analog to analog
|
||
| 7. | In a PCM system, if we increase the quantization levels from 2 to 8, how do the relative bandwidth requirements vary ? | |
|
Get doubled
|
||
|
Get tripled
|
||
|
Remain same
|
||
|
Become eight times
|
||
| 8. | The bandwidth of an n-bit binary coded PCM signal for an original signal bandwidth of B Hz is ? | |
|
B Hz
|
||
|
(B/N) Hz
|
||
|
nB Hz
|
||
|
N2B Hz
|
||
| 9. | Delta modulation uses…………bits sample ? | |
|
One
|
||
|
Two
|
||
|
Four
|
||
|
Eight
|
||
| 10. | Which of the following filters is used to demodulate a PAM signal ? | |
|
Band pass filter
|
||
|
Band reject filter
|
||
|
Low pass filter
|
||
|
High pass filter
|
||