Figure 122 81570A/71A/73A - Attenuation Factor Applied With No Offset; Figure 123 81570A/71A/73A Attenuation Offset - Agilent Technologies 8163A Manual

How to Use a Variable Optical Attenuator module
Agilent 8163A/B, 8164A/B & 8166A/B Mainframes, Sixth Edition
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10 Use the cursor key to enter the insertion loss measured at
[OK].
11 Disconnect the patchcord from the reference powermeter and connect it to the
DUT input.

Figure 122 81570A/71A/73A - Attenuation factor applied with no offset

Figure 122 shows an attenuation factor α of 3.850 dB applied with no α

Figure 123 81570A/71A/73A Attenuation Offset

Setting Attenuation and/or Power Levels
Step 7, then press
.
Offset
205