8.6 Summary
357
Table 8.6 Conversion rules
for a 3B4B code
Original code word
3B4B code word
Mode 1
Mode 2
000
0010
1101
001
0011
010
0101
011
0110
100
1001
101
1010
110
1100
111
1011
0100
Table 8.7 Data sequence
used in 4B5B code conversion
Data sequence
Encoded sequence
0000
11110
0001
01001
0010
10100
0011
10101
0100
01010
0101
01011
0110
01110
0111
01111
1000
10010
1001
10011
1010
10110
1011
10111
1100
11010
1101
11011
1110
11100
1111
11101
8.3 Find the maximum attenuation-limited transmission distance of the following
two systems operating at 100 Mb/s:
System 1 operating at 850 nm
(a) GaAlAs laser diode: 0-dBm (1-mW) fiber-coupled power
(b) Silicon avalanche photodiode: −50-dBm sensitivity
(c) Graded-index fiber: 3.5-dB/km attenuation at 850 nm
(d) Connector loss: 1 dB/connector
System 2 operating at 1300 nm