EXFO FPM-600 Power Meter - Manual (Page 40)

Using a Light Source (FLS-600 and FOT-600) or VFL
34 FPM/FLS/FOT-600
Activating/Deactivating a Light Source or VFL
Activating/Deactivating a Light Source or VFL
Only one source may be active at a time. When no source is active, the unit
displays OFF.
To activate a light source (or VFL) and change the wavelength:
Press
to activate each available source in turn, including the VFL. The
unit displays the wavelength and modulation.
To deactivate the light source:
Press
until you get past the last source.
Modulating the Source Signal
When you activate the first source (after turning on the unit), the signal is
always CW (unmodulated). When you switch sources, the modulation
remains the same (VFL remembers its own modulation). Modulation is
indicated in the top left (port #1) or top right (port #2) corner.
Available modulation values are: CW, Auto, auto-switching mode,270 Hz,
1 kHz and 2 kHz (VFL: CW and 1 Hz only).
Note: Auto is a modulated signal detected by compatible units (see Automatically
Detecting Wavelength on page 29). It provides longer battery life than CW,
but covers a reduced power range.
FOT-600 FLS-600
Source wavelength (and VFL indicator)
and modulation (when active) Active source port