Technical data

282 Chapter 10
Distance to Fault
Measuring Distance to Fault
Distance to Fault
Agilent recommends that you select your cable type before performing calibrations.
Press [Mode], [Antenna/Cable], [Distance to Fault], [Cable Type] to set the cable
type.
The calibration remains valid until you do any one of the following:
• set the Distance to Fault frequency range to
Auto. Note that the calibration will
become valid again as soon as you switch from
Auto back to Manual Frequency
Range.
• power off the test set
• change the start frequency to a new value that lies below the start frequency of
your previous calibration
• change the stop frequency to a new value that lies above the stop frequency of
your previous calibration
• change any of the jumper leads that you used for the calibration
• change any of the attenuators that you used for the calibration
• change the type of cable specified under the [Cable Type] menu key.
NOTE None of the following calibrations are valid for Distance to Fault calibrations with
Frequency Range set to Auto:
• Distance to Fault calibrations performed with the
Frequency Range set to
Manual
• One Port Insertion Loss calibrations
• Two Port Insertion Loss calibrations
• Return Loss calibrations
Note also that Distance to Fault calibrations performed with the
Frequency Range
set to
Auto are not valid for any other measurement, including Distance to Fault
with the Frequency Range set to Manual.