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9.
Ensure the VSWR soft key is set to VSWR On.
6.1.5.3
Gather Test Data
To Gather Test Data
This is used to gather the required Test Data.
1.
Observe the VSWR trace.
2.
Adjust the markers to display the VSWR measurement at the desired frequency.
3.
To observe Return Loss measurement, open the Instrument Settings menu and set
the measurement mode to Return Loss.
6.2
Performing Distance to Fault (DTF) Tests
6.2.1 Scope of Test
Distance to Fault (DTF) measurements, provides the capability to analyze, troubleshoot
and identify signal path degradation in cables and transmission lines. Faults are a result of
conditions such as poor connections, damaged cables, or faulty antennas.
This test is used to evaluate the following performance issues:
•
The distance to fault of a coaxial cable.
6.2.2 UUT Parameters/Characteristics
The example in this section assumes the following UUT characteristics and settings; adjust
settings according to the operational capabilities of the UUT.
Parameter
Coaxial cable type
Coaxial cable length
6.2.3 Equipment Needed
The following equipment is required to perform the test procedures defined in this section:
•
CX100 ComXpert
•
Cable to best tested
22144016
October 2022
Table 6-3 DTF Test - Example Cable Characteristics
CX100 ComXpert Test and Measurement Guide
Chapter 6 Performing VSWR and DTF Tests
Performing Distance to Fault (DTF) Tests
Setting
RG58
20 ft
Rev 000
6 - 5
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