DTF (Distance to Fault) Measurements 31
7. Disconnect any components or antenna that should NOT be measured and
connect a LOAD at the end of the DUT.
8. Press Meas Setup 4 then DTF Cable Specifications.
9. Either press Recall Coax Cable, or enter the Velocity Factor and Cable
Loss of the DUT.
10. Connect the start end of the DUT to the FieldFox.
11. Press Meas Setup 4 then Settings then Next Page. If the Alias-free Range
setting is False, then you may see Alias faults on the screen. Learn more on
page 37.
DTF Measurement Settings
DTF Settings Table
You can set and view all of the DTF settings, including some calculated values, on
the DTF Settings table. Learn about the calculated values on page 36.
How to make settings on the DTF settings table
Press Meas Setup 4.
Then Settings.
Press Next Page and Previous Page to view all settings.
To change a setting:
o Use the ▲|▼ arrows or rotary knob to highlight a setting.
o Numeric settings can be changed by pressing numbers using the numeric
keypad. Then press Enter or select a suffix if available.
o Other settings require you to press Edit, then press a softkey to change the
value.
o When finished changing a value, press Done Edit.
Press Dock Window to relocate the Settings table to a position relative to the
trace window. The Dock Window setting persists through a Preset. Choose
from the following:
o Full (Default setting) Only the Settings table is shown on the screen. The
trace window is temporarily not shown.
o Left The Settings table is shown to the left of the trace window.
o Bottom The Settings table is shown below the trace window.
When finished changing ALL settings, press Done to save your settings.
DTF Measurement (Format)
You can select from 3 different DTF Formats.
Press Measure 1
Then choose from:
o Distance to Fault (dB) Faults are displayed on the Y-axis in return loss
format, expressed as a positive number in dB.
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