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)

Step 4 - Adjust and place the cursor at the beginning of the trace to obtain the distance coordinate zl (see figure 6Bl-l).

Optical power (dB)

Z3 Z2

Zl Z4

Distance (Km)

FIGURE 6Bl-l. OTDR display - (typical).

Step 5 - Place the second cursor at the end of the trace to obtain the distance coordinate z2.

Step 6 - Adjust the group index setting until the difference (z2-zl) equals the length of the calibration cable.

Step 7 - Disconnect the calibration cable from the OTDR.

Step 8 - Select one end of the optical fiber cable under test.

NOTE: If the optical fiber cable is terminated on one end, select the terminated end.

NOTE: If both ends of the optical fiber are unterminated, install the bare fiber adapter on the prepared end of the fiber.

Step 9 - Select the applicable MQJ from table 6Bl-III. Connect the optical fiber cable under test to the OTDR using the MQJ as shown in figure

6Bl-2.

NOTE: For optical fiber cables under test terminated with M83522 or COTS ST connectors, an ST to ST adapter, is required to connect the MQJ to the optical fiber cable under test. For optical fiber cables under test terminated with COTS SC or other COTS fiber optic connectors, a hybrid adapter is required to connect the MQJ to the optical fiber cable

under test.

6Bl-4

METHOD 6Bl