Return Loss Measurement Return Loss Measurement
176 Agilent 8163A/B, 8164A/B & 8166A/B Mainframes, Sixth Edition
Calibrating the Return Loss Module
Whenever a Return Loss module is in the mainframe, a return loss value is
displayed. The calibration values used are either the most recently
measured, where these are available, or factory default values.
If you are unsure of any of the calibration values that you are using, or if
you have changed the measurement setup, take the appropriate
calibration measurements again.
• First, calibrate the return loss module against a component of known
reflectance.
• The Agilent 81000BR Reference Reflector allows you to make a Reflectance
Calibration and a Termination Calibration.
• These procedures are decribed in “Calibration using the Agilent 81000BR
Reference Reflector” on page 177.
• The Agilent 81610CC Reference Cable also allows you to make a Reflect-
ance Calibration. Use the measurement patchcord to make a Termination
Calibration.
• To measure insertion loss and the front panel delta of the system (see
“Calculating the Front Panel Delta” on page 195), you must also measure
the insertion loss of the Reference Cable and mesurement patchcord.
• These procedures are decribed in “Calibration using the Agilent 81610CC
Reference Cable” on page 180.
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