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Figure 4-4
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Testing Optical Couplers
Measuring Optical Coupler Characteristics
Measuring the Directivity
The Directivity is a measure of the isolation between the two input
ports of the coupler.
1 Connect one of the heads to the secondary input of the coupler.
2 Check the "Head" parameter on the display. If it does not show
the head to which you have connected the secondary input, press
H
B
or
H
EAD
3 Check the stability of your setup.
4 Press DIR.
Coupler Test Directivity Display
5 Press M
ORE
71
A
respectively.
EAD
and
C
.
to return to the Coupler Test screen.
OUP
TEST
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