Agilent Technologies 8156A manual Head must not move until the measurements are finished

	Performance Tests
	V. Polarization Dependent Loss (PDL): Optional
CA UT I O N	The patchcords between the polarization controller and the optical
	head must not move until the measurements are finished.
	12. Set the 8156A Attenuator (DUT) to 0dB using the modify keys.
Figure D-14	PDL Test Setup 2: Power after DUT

13.Measure the optical power after the DUT a. Linear Horizontal polarized light.

•Set the λ /4 and λ /2 Retarder Plates for Linear Horizontal polarization. You need to select the λ /4 and λ /2 Retarder plates by pressing λ /4 and λ /2 respectively.

Type the appropriate value and press ENTER after each entry.

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