EXFO PM-1600 High-Speed Power Meter User Manual

Page 24

Acquiring Power Measurements

PM-1600

Measuring Absolute Power

3. Press Shift a second time, then Display. The current correction factor

(CF) is displayed for the active channel (in dB or W/W units,
depending on the currently selected measurement unit).

4. Press Shift again, then Display. The Offset value (O) appears for the

active channel (in dB or W/W units, depending on the currently
selected measurement unit).

Note: On a PM-1610 single-channel power meter, two different data types

simultaneously appear at the bottom of the display. To select the desired
display mode, just press Display.

Measuring Absolute Power

When in absolute power, measured values are displayed in either dBm or
W units (pW, nW, µW, mW...) according to the power of the signal, and the
displayed value represents the absolute optical power reaching the
detector within specified uncertainty.

To display absolute power,
1. If necessary, select the desired channel (PM-1620). In the above figure,

channel #1 is currently selected.

AUTO

1310.00 nm

-14.278

dBm

LR2

1550.00 nm

1.26

W/W

Power reading

Current wavelength

Measurement unit