MIL-STD-2042-6B(SH)
3.2 Frocedure.
WARNING:Do not stare into the end of an optical fiber connected to an LED or laser diode. Light may not be visible but can still damage the eye.
NOTE: Ensure the test equipment calibration is current.
NOTE: Use a wipe dampened with alcohol to clean the adapters/connectors and wipe them dry with a clean, lint free, cotton (100%) cloth before making the connections.
NOTE: This procedure involves the use of Measurement Quality Jumper cables (MQJs). Dirty or defective MQJs will lead to low or unacceptable cable assembly return loss values. MQJs used in these procedures should be clean and should be of known quality. Test organizations are encouraged to institute an MQJ verification program in which the quality of MQJs is regularly validated. Additional guidance on establishing an MQJ verification program can be obtained from the Naval Surface Warfare Center (see 1.1.1).
NOTE: Make sure of the specified return loss for the cable assembly under test. Use standard dome polish MQJs for test of cable assemblies with return loss requirements not less than 30 dB. Use enhanced dome
polish MQJs for test of cable assemblies with return loss requirements not less than 40 dB.
Step 1 - Energize the ORLM.
NOTE: Make sure that the ORLM has been energized for at least 10 minutes, to ensure stable performance, before making measurements.
Step 2 - Set the ORLM in optical return loss mode. (Refer to the manufacturer's instructions for additional information.)
Step 3 - Select the 1310 nm wavelength (if the ORLM can perform return loss measurements at multiple wavelengths).
Step 4 - Attach the SC/AFC connector of the ORLM interface cable to the optical receptacle of the ORLM.
NOTE: The SC/AFC connector is an angle polished SC connector. The angle on the end of the connector ferrule can be observed in a visual inspection.
NOTE: If the ORLM input port is an ST connection, do not use an ORLM
interface cable.
Step 5 - Select the applicable input MQJ from table 6K1-II, and connect the input MQJ to the ORLM interface cable using the hybrid adapter as shown in figure 6K1-1.
NOTE: If the ORLM input port is an ST connection, connect the input
MQJ directly to the ORLM.
NOTE: Do not connect the input MQJ to the optical fiber cable assembly under test. This connection is not completed until step 10.
6K1-2
METHOD 6K1
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