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Unformatted text preview: used to ensure that the result is positive. In
other words, since we are discussing realvalued signals, every negativefrequency component is accompanied
by a positivefrequency counterpart. When asked for “the frequency” of a sinusoidal signal, we report the
positive number. 1 116 Solution
The bandwidth of a raisedcosine pulse is W = 21 (1 + β ). With T = 1µs and β = 0.5, W = 750kHz. The
T
bandwidth occupied by a DSBSC signal is 2W, hence the bandwidth occupied by the transmitted signal is
1.5 MHz. 2 31 Solution
The 8 possible topologies for a 2terminal RLC circuit are shown below R L
L
C (a) L C (b) C
R (c) C C C R L C L
R (d) R L R R
(e) L R (f) (g) L (h) C Figure 1: Eight possible twoterminal RLC circuits.
Only circuits (c), (e), (f), and (g) have ﬁnite, pur...
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 Spring '08
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