EXFO EPM-500 Power Meter - Manual (Page 24)

Using a Light Source (ELS-500 and EOT-500) or VFL 19
To use the actual source output power as reference (EOT-500 only):
1. Connect a fiber between the source and power meter of same unit.
2. Activate the source at the desired wavelength.
3. Match the source and power meter wavelengths:
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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.
OR
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Press to switch between calibrated wavelengths.
4. From normal operating mode, hold down and . The unit displays PREF
for a few seconds while saving the value, then returns to normal mode.
To send the source power value:
1. Activate the source.
2. Change the modulation signal to AUTO or auto-switching.
If you use auto-switching mode, the power value of each wavelength will
automatically be sent.
3. Hold down and to send the power value with an auto-wavelength
signal. The unit displays Send for a few seconds, then returns to normal mode.