To calculate talkset distance D =
R / A:
D = talkset distance
R = dynamic range of talk set
A = typical fiber attenuation at
specified wavelength
Example 1 (multimode):
Wavelength = 1300nm, R = 20 dB, A
= 1.0 dB/km
D = 20 dB / (1.0 dB/km) = 20
km
Example 2 (single mode):
Wavelength = 1550nm, R=20 dB,
A=0.5dB/km
D = 20 dB / (0.5 dB/km) = 40
km |