48
Taking Polarization Dependent Measurements
Measuring the Polarization Dependent Characteristics of
Couplers
The display shows the measured values for the Polarization
Dependent Coupling Ratio (PDCR) and the Polarization Dependent
Splitting Ratio (PDSR).
Checking the Measurement Conditions
1
If not already done, check the general instrument settings by
pressing P
RESET
.
For highest resolution, the “No. of Digits” should read 0.1234
and “Low PDL” should be set. The “Mode” will affect the
measuring method (see section 1.6 “Getting Started” on
page 31). Press
P
REVIOUS
to return to the PD Coupler Test.
2
Check the “Head” parameter on the display. If you want to
measure the other output of the coupler, press
H
EAD
A
or
H
EAD
B
respectively.
Before you record the values of the Polarization Dependent
Coupling Ratio and the Polarization Dependent Splitting Ratio on
your test protocol, it is important to check the stability of your
setup.
Checking the Stability of the Setup
1
Press M
ORE
.
2
Press
S
TABILITY
.
3
Check the stability value. Refer to page 31 in section 1.6
“Getting Started” for information on the stability value.
4
Press
P
REVIOUS
to return to the previous page and read the PDL.
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