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Figure 2-2
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Taking Polarization Dependent Measurements
Measuring Polarization Dependent Loss
3 Activate the optical output.
If you use the internal light source, press S
turn the source on. The source indicator lamp must be lit.
If you have connected an external light source to the optical
input, press S
source indicator lamp must be off.
Starting the Measurement
1 Press A
to activate the "Select Applications" menu.
PPL
2 Choose "Pol. Depend. Loss".
3 Wait until the result is displayed.
The OLA immediately starts to measure. Depending on the PDL
value, the instrument automatically chooses the right amount of
samples to achieve the specified accuracy. The bargraph at the
bottom of the display shows the measurement in progress. The
larger the PDL value of the DUT is, the longer the measurement
takes.
Polarization Dependent Loss Display
42
O
/O
to turn the internal source off. The
OURCE
N
FF
O
/O
to
OURCE
N
FF
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