All fiber optic power meters
When measuring Absolute Power in dBm or milliwatt, you observe a small measurement error. This could be observed in a laboratory or manufacturing environment.
Possible Cause 1: Incorrect FOA type is being used.
- FOA = Fiber Optic Adapter and is the part screwed on to the power meter detector receptacle.
- FOA-3XX series should be used in lab power meters, and FOA-XX should be used on field power meters.
- PX1 has a different type of adapter called FOAS.
Possible Cause 2: The light source type may be inappropriate.
- EXFO power meters are calibrated with narrow band laser sources.
- When using other source types ( LED, Fabry Perot, other) small variations are normal.
Possible Cause 3:The wavelength is not selected correctly.
- Sometimes light sources have nominal wavelength, but the true wavelength is different.
- For accurate measurements, it is best to measure the wavelength of the source, and set the power meter as close as possible to the same wavelength.
Possible Cause 4: There is dirt or contamination in the optical path.
- Inspecting and cleaning the FOA, the fiber end-face, and the detector window will help eliminate this possible source of error.
Possible Cause 5: The warm up period is not completed.
- To achieve full performance, some lab power meters require a warm-up and/or temperature stabilization period.
Possible Cause 6: A Calibration or Repair may be required.
- If on inspection, you observe that the detector window is scratched or otherwise damaged, a repair is required. On most power meters this part can be replaced. Please request an RMA for repair.
- Your power meter may require a calibration. Please request an RMA for calibration.