1.2
Spectral Width = 0.8 nm
C-band refers to the wavelength range 1530–1565 nm.
C-band width range equal 35 nm.
So, 35 nm : 0.8 nm = 43 wavelength.
1.4
Phase = 1/6 x 180 = 30 degree
Phase = 0,51 radians
1.6
64 kbps, Tb = 0,15625 mikro second
5 Mbps, Tb = 20 mikro second
10 Gbps, Tb = 10 ns
1.8
Part A
1 pW = -90 dBm
1 nW = -60 dBm
1 mW = 0 dBm
10 mW = 10 dBm
50 mW = 16,98 dBm
Part B
-13 dBm = 50 mikro W
-6 dBm = 0,2 mW
6 dBm = 3,9 mW
17 dBm = 50,11 mW
10.10
3 Amp, 5 dB Gain. Total of Gain = 15 dB
Gain in numeric = 31,62 Times
10.12
B = 2 Mhz S/N=20dB
Shannon limit
Rb = B log (1+S/N)
=2 Mhz (log (21))
=2.64 Mbps
10.14
Sonet Frame = 125 mikro s
Virtual tributary = 1 / 125 mikro s = 8000
a. Bit rate / virtual tributary = 8 bps
b. Channel = 64 kbps / 8 bps = 8000 channel
c. Payload efficiency,