Signal Conditioning Measurement Operations & Settings
Agilent 8163A/B, 8164A/B & 8166A/B Mainframes, Fifth Edition 159
The table of wavelength-dependent offsets
When enabled, the attenuator uses its λ offset table to compensate for
wavelength dependent losses in th e test set-up. This table contains, for
each wavelength specified, the add itional power offset to be applied .
• If the attenuator module is set to a wavelength corresponding to an entry in its
λ offset table, the stored offset is added to the global power offset.
• If the attenuator module is set to a wavelength bet ween entries in its λ offset
table, linear interpolation is used to calculate the appropriate offset to add to the
global power offset.
• If the attenuator module is set to a wavelength beyond the range of the entries
in its λ offset table, the offset stored for the nearest wavelength is added to the
global power offset.
• Whether an exact , inter polate d, or ext rapola ted offs et valu e is appl ied, th e algo-
rithm applied can be queried using “:STATusn:OPERation:CONDition?” on
page68
Figure 6 Extrapolation and interpolation of atte nuator module λ offset table