UNIT – 2 PUZZLES
1) Pick the odd man out:
a. ratio detector
b. slope detector
c. balanced slope detector
d. envelope detector
2 Find the missing letters
a) Di- -r- - - - -t – r
b) _ _ S _ o _ _i _ _
c) O _ _ _l _ _ t _ r
3 Copy the letters in the numbered cells to other cells with the same number.
Thwie
Woehinntn
Guasinsa
Kpin
Wobrnr
ensio
4 Which is Discrete signal
5
6.
7.
8 Match the following:
Modulation Technique
a. Amplitude Modulation
b. Frequency Modulation
c. Vestigial Side band modulation
d. Phase modulation
e. Balanced Modulator
f. FM and PM
Applications
1. audio transmission
2. Digital synthesizers
3. video and image transmission
4. Phase Constant
5. Television signals
6. DSB-SC
Ans: a-3, b-1, c-5, d-2, e-6, f- 4
9
DOUBLE PUZZLE
UNIT 2
10
UNSCRAMBLE THE TITLE TO FIND THE WORD
11.
12.
13
CRISS – CROSS
ANS:
14 Fallen phrase
15. What does figure a. and b. represents?
ANSWERS
1. envelope detector. It is AM detection technique whereas all the others are FM detection
technique.
2. a) discriminator b) distortion c) oscillator d) broadband
3. White, Nonwhite, Gaussian, Pink, Brown, NOISE
4.
5.
6.
TIME DIVISION MULTIPLEXING
7.
SIGNAL TO NOISE RATIO
8.
a-3, b-1, c-5, d-2, e-6, f- 4
9.
SOURCE, TRANSMITTER, CHANNEL, RECEIVER, MODULATION, AMPLITUDE, FREQUENCY, PHASE,
BANDWIDTH, POSITION
10. ANS: BALANCED MODULATOR
11. ANS: THRESHOLD EFFECT
12. ANS: PRE EMPHASIS
13.
6. COMMUNICATION
1. WIDEBANDFM
2. MODULATION
3. PHASEMODULATION
4. CHANNEL
5. DIGITAL
7. ANALOG
14. Transmission bandwidth in vestigial sideband modulation is twice the modulating frequency
15. Ans: a. Represents time domain representation of an impulse signal
Represents frequency domain representation of an impulse signal