Test Method for Insertion Loss/Optical Throughput:
Remove all equipment dust caps and dry wipe lenses (very gently). Dry wipe all connector terminations at least once before making measurements. Verify unusual measurements by re-wiping terminations and lenses. Dry wipe all dust caps before replacing them on the connectors or optical equipment.
Each segment of the launch cables should be measured independently and then concatenated as it will be used during the vibration test. To determine the throughput, attach the cable, or link, of interest as shown below - between emitter source A (or B) and the O/E converter. The oscilloscope data is given in mV. Convert to dBm by dividing by 5, taking the log10 and multiplying by 10. Control measurements should be taken at the beginning of each measurement session using the D80-D90 control cable, the SMA-ST adapter cables (used on attenuator) and the evaluation channels without launch cables. A control measurement should also be taken for each evaluation channel by using the SMA-ST adapter cables as launch cables. Data should be taken with the attenuator set to zero. The attenuation setting should then be recorded for a 0.008mW throughput.
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