1. Consider a system shown in fig 5. Assume the Balanced Modulator is just a multiplier. The positive frequencies where Y( f) has spectral peak are (A) 1 kHz and 24 kHz (C) 1 kHz and 14 kHz (B) 2 kHz and 24 kHz (D) 2 kHz and 14 kHz X(f) Balanced HPF Balanced x(t) y(t) Modulator 10 kHz Modulator -f(kH: 3 -3 -1 10 kHz 13 kHz Figure 5

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Select the correct choice for each of the following items:
1. Consider a system shown in fig 5. Assume the Balanced Modulator is just a multiplier.
The positive frequencies where Y(f) has spectral peak are
(B) 2 kHz and 24 kHz
(D) 2 kHz and 14 kHz
(A) 1 kHz and 24 kHz
(C) 1 kHz and 14 kHz
X(f)
НPF
10 kHz
Balanced
Balanced
Modulator
x(t)
y(t)
Modulator
f(kH:
3
-3
-1
1
10 kHz
13 kHz
Figure 5
2. In a SSB demodulator system, the received signal power is 10-10 W with a modulating
signal frequency of 5 kHz. The 1-sided noise power spectral density is 10 -18 wW/Hz. The
signals-to-noise ratio at the input to the receiver is
(A) 5 000
(B) 10 000
(С) 40 000
(D) 20 000
Transcribed Image Text:Select the correct choice for each of the following items: 1. Consider a system shown in fig 5. Assume the Balanced Modulator is just a multiplier. The positive frequencies where Y(f) has spectral peak are (B) 2 kHz and 24 kHz (D) 2 kHz and 14 kHz (A) 1 kHz and 24 kHz (C) 1 kHz and 14 kHz X(f) НPF 10 kHz Balanced Balanced Modulator x(t) y(t) Modulator f(kH: 3 -3 -1 1 10 kHz 13 kHz Figure 5 2. In a SSB demodulator system, the received signal power is 10-10 W with a modulating signal frequency of 5 kHz. The 1-sided noise power spectral density is 10 -18 wW/Hz. The signals-to-noise ratio at the input to the receiver is (A) 5 000 (B) 10 000 (С) 40 000 (D) 20 000
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