EXFO FTB-800 Series for FTB-1 - Manual (Page 208)

Test Setup - Test Configurator, Timer, and System
198 FTB-700G/800 Series
Signal (Transport)
Signal (Transport)
From the Test menu, tap Setup, Test Configurator, the interface block,
and the Signal tab.
Physical Interface - Optical
Note: For electrical interface, see Physical Interface - Electrical on page 199.

Laser indicates the status of the laser: ON with the laser pictogram
(emitting an optical laser signal) or OFF.

TX Power (dBm) indicates, when supported, the transmit power level
of the optical laser in dBm.

Wavelength (nm) indicates, when supported, the detected laser
wavelength.

RX Power (dBm) indicates, when supported, the current received
power level of the optical laser in dBm.
Green: Power level in range.
Yellow: Power level out-of-range.
Red: Loss of signal or power level is close to damage.
Gray: Invalid operational range value.

Min RX Power (dBm) indicates, when supported, the minimum
received power level of the optical laser in dBm.

Max RX Power (dBm) indicates, when supported, the maximum
received power level of the optical laser in dBm.

Lasers OFF at Start-Up allows to automatically turn off the laser when
starting the module or when switching from one test application of the
same group (Transport, Ethernet, Packet Sync, Fibre Channel, or
Wireless) to another.

Power Range (dBm) indicates the SFP/SFP+ operational RX power
range.