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Figure 4-2
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Testing Optical Couplers
Measuring Optical Coupler Characteristics
1 Connect the optical output to input no. 1 of the device under test
(DUT).
2 Connect optical head A to output no. 1 of the DUT.
3 Connect optical head B to output no. 2 of the DUT.
4 Activate the optical output.
If you want to use the internal light source, press S
O
to turn the source on. The source indicator lamp must be lit.
FF
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 "Coupler Test".
The first page of the coupler test is displayed.
Coupler Test Display, Page 1
The display shows the measured values for the Coupling Ratio
(CR) and the Splitting Ratio (SR).
68
O
/O
to turn the internal source off. The
OURCE
N
FF
O
/
OURCE
N
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