Window Settings; Dtf Units; Calculated Dtf Values - Keysight N9923A FieldFox User Manual

The correction for loss at 5 meters in one direction: 0.18 dB/m * 5m = 0.9 dB.
All DTF measurements correct for loss for travel down the DUT and back, so double
the correction: 0.9 dB * 2 = 1.8 dB.

Window Settings

Window settings provide the ability to choose between optimizing DTF
measurements for resolving closely-spaced faults or for the ability to measure low-
level faults.
How to select Window settings
 Press Meas Setup 4.
 Then Settings.
 Then press ▲|▼ arrows to move to the Window row.
 Then press Edit.
 Then press
 Then press
 Again press Done.

DTF Units

The DTF Units setting is available ONLY on the DTF Settings table.
By default, X-axis units for DTF measurement settings are displayed in Meters.
How to change DTF units
 With a DTF measurement present, press Freq/Dist.
 Then
 The current selection is underlined

Calculated DTF values

Press
noted on the FieldFox screen with c - <setting>
Start Frequency – Start frequency that is used to calculate DTF.
Stop Frequency – Stop frequency that is used to calculate DTF.
Range Resolution. Indicates the accuracy of the distance to fault measurement. For
example, with range resolution of 500 mm, if the distance to fault is 10 meters, this
value could be inaccurate by +/- 500 mm or between 9.5 to 10.5 meters. This value
is calculated from frequency span / resolution (points).
60
1.8 GHz = 0.18 dB/m
2 GHz = 0.2 dB/m
repeatedly and choose from the following:
Window
Maximum – Optimized for dynamic range, the noise floor is lowered to provide
o
the ability to measure low-level responses. (Default setting)
Medium – Compromise between Min and Max window settings.
o
Minimum – Best Response Resolution, providing the ability to resolve between
o
two closely-spaced responses.
Done Edit.
DTF Units.
on the DTF Settings Table to view the following calculated Values
Next Page
m (meters) Feet.
FieldFox User's Guide