MIL-STD-2042-6 Fiber Optic Cable Topology Installation Standard Methods For Naval Ships Tests Part 6 Of 7 PartsThis standard practice provides detailed methods for testing optical fiber cable installations.

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MIL-STD-2042-6B(SH)

Reference cable

Test jumper

ST's, termini,

or splice ferrules

Light

source

connectors

Power meter

FIGURE 6F1-4. Connecting the test jumper. Step 10 -Record the power at the meter (P2).

Step 11 -Calculate the ST, terminus or splice connection loss using the

following formula:

BC = ( Pl - P2 )

Where: BC = ST, terminus or splice connection loss in dB P1 = Reference cable power in dBm

P2 = Test power in dBm

Step 12 -Record the ST, terminus or splice connection loss along with the test jumper identification.

Step 13 -Repeat step 9 through step 12 a minimum of three times (a maximum of ten times) for the selected MQJ. (A wipe dampened with alcohol may be used to clean the adapters/connectors and they may be blown dry with air before making each connection.)

3.3 Calculations.

Step 1 - Calculate the mean loss for each end of the MQJ using the following formula and record the results:

l m

μC = x ∑Bn

n=l

Where: uC = Mean connection loss in dB

Bn = Connection loss for measurement n in dB

m = Number of loss measurements performed

Step 2 - Calculate the standard deviation of the measured loss for each MQJ end using the following formula and record the results:

∑(Bn

- μC )

α C =

n=l

m −1

Where: sc = Standard deviation of the connection loss in dB

m = Number of loss measurements performed

6F1-5

METHOD 6F1