EXFO EPM-500 Power Meter - Manual (Page 19)

EPM-500/ELS-500/EOT-500 14
Automatically Detecting Wavelength
Compatible sources (such as EOT-500 and ELS-500) can transmit their wavelength
value through the fiber, avoiding the need to manually match the source and power
meter wavelengths.
Note: When you receive an auto-wavelength signal or when the source is in
auto-switching mode, you cannot manually change the power meter
wavelength. The power meter behavior is totally determined by the
source.
To receive the auto-wavelength signal or detect the source's
auto-switching mode:
1. Connect a compatible source to your power meter.
2. Activate the source in Auto mode (EOT-500 and
ELS-500: see Modulating the Source Signal on
page 17) or in auto-switching mode (see Using
Auto-Switching Mode on page 17).
Your power meter automatically matches the
source wavelength. If the wavelengths differ, it also
beeps and returns you to normal operating mode.