Keysight Technologies 8163A, User Manual

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190 8163A/B, 8164A/B, 8166A/B User’s Guide
7 Return Loss Measurement
Tip: The Keysight 81000BR Back Reflector is such a component, offering a
return loss of 0.18
±
0.1 dB.
3 Move to the Return Loss channel, then press [Details]
4 Move to [
FPDelta ], press [Edit] , set the value to 0.000, then press [OK].
5 Move to [ RLref ] and make sure that the displayed value is correct. Set
[ RLref ] to the value of the return loss of the reference reflection you are
using. For example, if you are using the Keysight 81000BR reference
reflector, set [ RLref ] to 0.18 dB.
Figure 109 Measuring the Reflection Reference
6 Switch on the Laser.
7 Press [Menu]. Move to <
Reflectance calibration > and press Enter . The
instrument measures the power reflected by the back reflector. The
[ RL ] value changes to the same value as entered for [ RLref ].
Tip: An alternative step
step 7
is to select the Return Loss module’s
[Detail] screen, then press [RefCal]