Measuring Pdl And Insertion Loss Simultaneously; Explanation Of The Results; Polarization Dependent Loss / Insertion Loss Display - Agilent Technologies HP E5574A User Manual

Figure 2-3
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Taking Polarization Dependent Measurements
Measuring Polarization Dependent Loss

Measuring PDL and Insertion Loss Simultaneously

ATTEN TI O N Before you measure Insertion Loss, you must at
least measure and store the reference power P ref. If you have not yet
stored the reference power, refer to page 31 in section 1.6 "Getting
Started".
1 Press A to activate the "Select Applications" menu.
PPL
2 Choose "PDL / Ins. Loss".
The instrument immediately starts to measure. Wait until the values
are displayed.

Polarization Dependent Loss / Insertion Loss Display

Explanation of the Results

The values are calculated according to the following formulas:
Polarization Dependent Loss
PDL =
PDL (dB)
A/B
For most components (except polarizers) the PDL is much smaller
than the Insertion Loss.
44
P
max
⋅
10 log ----------- -
P
min
P max
A/B
⋅
= 10 log ----------------------- -
P min
A/B