2.07 (a)(4/r)Isin(2rf)+(13)sin(2n(300+(1/5)sin(2(50)A 10 1 .ST:II 2.0T (b)(4/r)tsin(2n)+(1/3)sin(2m(300)+(15i(2rs0o+()sin2r( 0 1.0 1.0T 5了 (c)(4/r)2(1/k)sin(2r(f)Desu Figure 3.7 Frequency Components of Square Wave (T=10-HC 11
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Bits:po 1oo Pulses before transmission Bit rate. 2000 bits per second 」三几 Pulses after transmission Bandwidth 500 Hz Bandwidth 900 Hz AAAN Bandwidth 1300 Hz A Bandwidth 1700 Hz 几0几 系统带宽对信号的影响 Bandwidth 2500 Hz Bandwidth 4000 Hz Figure 3. 8 Effect of Bandwidth on a Digital Signal
12 系统带宽对信号的影响