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)

NOTE: For single mode fiber measurements, the reference cable may include a single loop with a diameter of 30 mm (l in) to eliminate higher order mode power.

Reference cable

connectors

FIGURE 6Fl-l. Connecting the reference cable.

NOTE: The time delay between the measurement of Pl and P2 shall be kept to a minimum to prevent inaccurate readings.

NOTE: The reference cable to light source connection shall not be disturbed between measurement of Pl and P2 to prevent inaccurate readings.

Step 3 - Connect the MQJ to the reference cable using a single-mode ST to ST adapter and to the power meter using the applicable power meter adapter head (see figure 6Fl- 2).

Reference cable Test jumper

connectors

Light source

Power meter adapter

Power meter

FIGURE 6Fl-2. Connecting the test jumper. Step 4 - Record the power at the meter (P2).

Step 5 - Calculate the ST connector loss using the following formula:

BST = ( P1 - P2 )

Where: BST = ST connector loss in dB

Pl = Reference cable power in dBm

P2 = Test power in dBm

Step 6 - Record the ST connector loss along with the MQJ identification.

6Fl-3

METHOD 6Fl