Exfo EPM-500 Power Meter Bedienungsanleitung PDF herunterladen (Seite 17)

EPM-500/ELS-500/EOT-500 12

3. Match the source and power meter wavelengths:

³ If the source emits an auto-wavelength signal

or is in auto-switching mode (see

Automatically Detecting Wavelength on

page 14 and Using Auto-Switching Mode on

page 17), the power meter automatically

matches the source wavelength.

³ Press to switch between calibrated wavelengths.

4. Hold down a few seconds. The power meter

stores the currently detected power as the new

reference power.

Reference power is displayed in the top right

corner (in dBm) and current loss reading is

automatically switched to dB.

5. Repeat the procedure for each wavelength you

want to reference (if you use auto-switching mode, the power meter

automatically references wavelengths one at a time).

Note: When using dB units, press to display the current wavelength for a

few seconds. To change this wavelength, press again while it is

displayed.

Measuring Power or Loss

Measuring absolute power or link loss is done the same way, except for the

referencing step.

To perform power or loss measurements:

1. If necessary, perform an offset nulling (see Nulling Electrical Offsets on page 10).

2. Check and clean your fibers appropriately for optimum performance

(see Cleaning and Connecting Optical Fibers on page 9).

3. For loss measurements, reference your power meter to a light source

(see Referencing Your Power Meter to a Source on page 11), then deactivate the

light source.

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Exfo EPM-500 Power Meter Bedienungsanleitung Seite 17