Black Box TS255A Specifikace stáhnout pdf (Strana 36)

Attenuation

Chapter 3 Optical TAPs

rev. 1

This shows the power loss budget for Link A to Link B.

The budget for the network side is 8.356 dB. Any split ratio is valid

because 8.356 dB is greater than any of the insertion losses from

Tabl e 5 on page 33.

Before we can say that any split ratio will work though, we must also

check the light power to the analyzer.

Link A ↔ Link B

Send Device Power -9.000

Receive Device Sensitivity - -19.5

Power Loss Budget 10.500

Number of Connectors 4.0

Connector Loss

1. Multimode.

x 0.5

Connector Loss 2.0

Fiber Length Link A (8 meters) 0.008

Fiber Loss Link A

2. 850nm multimode.

x 3.0

Fiber Loss Link A total +0.024

Fiber Length Link B (40 meters) 0.04

Fiber Loss Link B x 3.0

Fiber Loss Link B total +0.120

Attenuation -2.144

Power Loss Budget - Attenuation

3. Light power available for network. Any network split ratio smaller than

this number is feasible so long as the analyzer side is also feasible.

8.356

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Black Box TS255A Specifikace Strana 36