IndiaBIX

Electronics and Communication Engineering - Communication Systems

Exercise : Communication Systems - Section 16
1.
The block diagram of AM transmitter in which high level modulation is used as shown in figure. The block X could be
audio power amplifier
buffer RF amplifier
compressor amplifier
none of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
2.
In FM 'guard band' is provided
to limit upper frequency limit
to limit lower frequency limit
so that there is less adjacent channel interference
to limit transmitted power of a station
Answer: Option
Explanation:
No answer description is available. Let's discuss.
3.

Assertion (A): FM requires more bandwidth than AM

Reason (R): Wide band FM is used for broadcast transmissions.

Both A and R are correct and R is correct explanation of A
Both A and R are correct but R is not correct explanation of A
A is correct but R is wrong
A is wrong but R is correct
Answer: Option
Explanation:
No answer description is available. Let's discuss.
4.
When E1, E2, E3 etc. are the simultaneous modulating voltages, then the total modulating voltage Et will be
Et = E1 + E2 + E3 + ...
Et= E12 + E22 + E32 + ...
Answer: Option
Explanation:
No answer description is available. Let's discuss.
5.
A frequency doubler has an FM signal input at 13 MHz with a deviation of 5 kHz. The output, frequency for the carrier will be
26 MHz
26.1 MHz
10 kHz
160 kHz
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers