Figure 124 81576A/77A Setting P - Agilent Technologies 8163A Manual

How to Use a Variable Optical Attenuator module
NOTE
Agilent 8163A/B, 8164A/B & 8166A/B Mainframes, Sixth Edition
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6 Edit the P parameter to control the absolute power applied to the DUT. The
SET
α
attenuation, , displayed is updated to reflect the new P

Figure 124 81576A/77A Setting P

Figure 124 shows an absolute power P
• A power offset P
the Attenuator and the DUT.
• An attenuation factor
Your calibration is valid until there is some change to the optical path
between the Attenuator module and your DUT. Changes to the power
applied to the input of the Attenuator module are detectable by the
integrated powermeter.
For a multi-wavelength DWDM signal, your determined effective
wavelength λ
effective
optical power vs wavelength spectrum.
If either too much, or too little, input power is applied for the Attenuator to
maintain your desired P
Refer to "How to Use the Power Control Feature" on page 216 for
information about compensating for changes in input power.
Setting Attenuation and/or Power Levels
after calibration using [PM->Off]
SET
of -10 dBm applied to a DUT. Here:
SET
of 0.376 dB is applied to calibrate for losses between
Offset
α
of 7.656 dB is applied by the Attenuator's filter.
is valid until there is some change to the signal's
, the Attenuator status display includes 'Exp'.
SET
value.
SET
211