Table 5-33 - Viavi CX100 ComXpert Operation Manual

Chapter 5 RF Instrument Function Descriptions
VSWR/DTF
Soft-keys
Calibrate
Soft-key
Pause/Resume
Soft-key
5.4.4.3 DTF Instrument Settings
The Instrument Settings menu accesses the controls and settings that define how distance
to fault measurements are performed.
Control/Setting
Horizontal Range
Distance
Settings
Rev 002
5 - 66
Table 5-32 DTF Soft-keys (Continued)
Description
Calibration should be performed to ensure the accuracy of DTF
measurements.
An attention symbol is displayed on the Calibrate soft-key
when the specified frequency values are outside of the
calibrated frequency range and therefore a calibration needs to
be performed.
Pressing the Calibrate soft-key opens a window that contains
radio buttons that select the following:
Internal Calibration
The internal calibration procedure is an automated
procedure that utilizes the devices internal Short/Open/Load
(SOL).
External Calibration
The external calibration procedure requires use of external
equipment and connections. External procedure is a manual
procedure that requires the user to configure hardware
connections at various stages in the procedure. On-screen
instructions are provided at various stages of the calibration
procedure which guide the user through the procedure.
Pressing the Pause soft-key temporarily halts data updates to
the UI. When this occurs the soft-key updates to the Resume
soft-key. Pressing the Resume soft-key restarts the VSWR
measurement.
Table 5-33 DTF Instrument Settings
Description
The horizontal range allows the user to specify the distance unit
to use in the measurement. The selection is displayed on
horizontal axis.
Distance settings define the parameters used to evaluate the
transmission line.
Start
The Start field defines the beginning point along the length
of the cable which is the lower value of the measurement
range.
CX100 ComXpert Operation Manual 22144015
August 2023