Performing Absolute Power Measurements - EXFO USER GUIDE User Manual

Typical Applications

Performing Absolute Power Measurements

Performing Absolute Power Measurements
Absolute power measurements are necessary when performing system or
component monitoring, quality control, system or component acceptance,
and troubleshooting.
To carry out absolute power measurements:
1. Perform an offset nulling as explained in Nulling Offsets on page 38.
2. Make sure that the source is off, then, using an appropriate test jumper
and connector adapter, connect the DUT to the detector port.
3. Adjust the power meter to the correct wavelength and set the display
unit to dBm or W.
4. Switch on the source and allow it to stabilize (the recommended time
is 60 minutes).
5. The absolute optical power can now be monitored and recorded.
Note: With a multichannel high-speed power meter, absolute power can be
simultaneously measured for each independent channel. Simply apply
each step of the above procedure to all channels being used.
94
ACTIVE
IQS-2100
Light Source
DUT
ANALOG OUT
C1
C2
EXT.
TRIG
IQS-1600
2-Ch Power Meter
IQS-1600