Exfo FPM-600 Power Meter User Manual download pdf (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

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

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Exfo FPM-600 Power Meter User Manual Page 40