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)

SC connector               Hybrid adapter

ST connector

ORLM

interface

cable

6 mm mandrel

Input MQJ

SC/AFC

connector

FIGURE 6K1-1.  ORLM reference setup (typical).

Step 6 - Wrap the input MQJ (or the appropriate single fiber cable of the input

MQJ) around a 6 mm (0.25 in) mandrel.

NOTE:    The input MQJ (or the appropriate single fiber cable of the input MQJ)

should be wrapped around the mandrel until a stable value greater than

30 dB is indicated on the ORLM display.  Ten mandrel wraps are usually

sufficient to obtain a stable value.

NOTE:        When measuring enhanced polish products a stable value greater than 40 dB should be indicated on the ORLM display.

Step 7 - Reference the ORLM. (Refer to the manufacturer's instructions for additional information.)

Step 8 - Unwrap the input MQJ from the mandrel.

NOTE:        Do not unwrap the MQJ from the mandrel until the referencing process is complete.

Step 9 - Verify that the ORLM is displaying a value between 14.3 dB and 15.9 dB.

NOTE:        If a different value is displayed, then reconnect the ORLM interface cable to the input MQJ and repeat steps 6, 7, 8 and 9.  If this does not remedy the problem, then clean the ORLM interface cable and the input MQJ connections, and repeat steps 4 through 9.

Step 10 -CAUTION:  Make sure that the keys are correctly aligned to the mating keyways before mating MQJs to MIL-C-28876 optical fiber cables. Incorrect keyway alignment will result in damage to the connector pins.

Connect the appropriate end of the optical fiber cable assembly under test to the input MQJ.

NOTE:        For optical fiber cable assemblies under test terminated with M83522 or COTS ST connectors, an ST to ST adapter is required to connect the input MQJ to the optical fiber cable assembly under test.  For optical fiber cable assemblies under test terminated with COTS SC or other

COTS fiber optic connectors, a hybrid adapter is required to connect the input MQJ to the optical fiber cable assembly under test.

6K1-4

METHOD 6K1