MIL-STD-2042-6B(SH)
Step 11 -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.
Select the applicable output MQJ from table 6L1-II, and connect the output MQJ to the other end of the FOCT link under test as shown in figure 6L1-2.
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 output 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 output MQJ to the optical fiber cable assembly under test.
SC connector Hybrid adapter
ST connector
ORLM
interface cable
Input MQJ
SC/AFC
connector
ST connector
FOCT link under test
6 mm mandrel
Output MQJ
FIGURE 6L1-2. ORLM cable topology end-to-end measurement setup (typical).
Step 12 -Wrap the output MQJ (or the appropriate single fiber cable of the output MQJ) around a 6 mm (0.25 in) mandrel.
NOTE: The output MQJ (or the appropriate single fiber cable of the output MQJ) should be wrapped around the mandrel until a stable value is indicated on the ORLM display. Ten mandrel wraps are usually sufficient to obtain a stable value.
Step 13 -Record the value displayed by the ORLM. Step 14 -Unwrap the output MQJ from the mandrel.
NOTE: Do not unwrap the MQJ from the mandrel until the return loss value has been recorded.
Step 15 -Repeat the test for each fiber in the FOCT link under test.
6L1-5
METHOD 6L1
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