Keysight Technologies 8163A User Manual page 191

7 Return Loss Measurement
190
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
[Detail] screen, then press [RefCal]
step 7
is to select the Return Loss module's
8163A/B, 8164A/B, 8166A/B User's Guide