Qfx5230-64Cd Management Cable Specifications And Pinouts - Juniper QFX5230-64CD Hardware Manual

P = 13 dB - 2 km (1 dB/km) - 5 (0.5 dB) - 2 (0.5 dB) - 0.5 dB
M
P = 13 dB - 2 dB - 2.5 dB - 1 dB - 0.5 dB
M
P = 7 dB
M
The following sample calculation for an 8-km-long single-mode link with a power budget (P
uses the estimated values from
fiber attenuation (8 km @ 0.5 dB/km, or 4 dB) and loss for seven connectors (0.5 dB per connector, or
3.5 dB). The power margin (P
P = P - LL
M B
P = 13 dB - 8 km (0.5 dB/km) - 7(0.5 dB)
M
P = 13 dB - 4 dB - 3.5 dB
M
P = 5.5 dB
M
In both examples, the calculated power margin is greater than zero, indicating that the link has sufficient
power for transmission and does not exceed the maximum receiver input power.
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Table 25 on page 56 . This example calculates link loss (LL) as the sum of
) is calculated as follows:
M
57
) of 13 dB
B