Agilent Technologies 8164B User Guide

Setting Attenuation and/or Power Levels How to Use a Variable Optical Attenuator module
198 Agilent 8163A/B, 8164A/B, and 8166A/B User’s Guide, Fourth Edition
During a test that utilizes the λ Offset Table
When the Offset (λ) feature is on the exact offset applied depends on
how the operating wavelength λ you set for the Attenuator module
relates to the λ Offset Table entries, as shown in Figure 124.
Figure 124 Extrapolation and Interpolation of Offset Values
• If the operating wavelength matches a wavelength stored in the λ
Offset Table, the exact offset value is used. The Attenuator status
display includes ‘Exa’.
• If the operating wavelength is between two wavelengths stored in
the λ Offset Table, the offset applied is calculated by linear
interpolation. The Attenuator status display includes ‘Int’.
• If the operating wavelength is greater than, or less than, the range of
wavelengths stored in the λ Offset Table, the offset value for the
closest wavelength is extrapolated. The Attenuator status display
includes ‘Ext’.
linear interpolation
extrapolation:
same value for
all
l < l
1
l
extrapolation:
same value for
all
l > l
n
Offset Value
l
1
l
n

Agilent Technologies 8164B Specifications

General

Brand	Agilent Technologies
Model	8164B
Category	Measuring Instruments
Language	English