Keysight Technologies FieldFox N9912A104 User Manual page 60

DTF (Distance to Fault) Measurements
DTF Measurement Settings
— Press
How to Save or Recall a Cable
— Press
Enter a filename using the FieldFox labeler (learn more in
FieldFox labeler" on page
— Press
— Storage Device
is a different setting from the Save/Recall Storage Device setting. Choose
from Internal (default setting), USB (must be connected) or SD card.
About Cable files
— Cable files are saved to, and recalled from, the Cables folder. If the folder
does not already exist on a USB or SD card, it is created automatically
before storing the file.
— Cable files are stored as *.xml files. Existing cable files that are preloaded
into the FieldFox firmware can be overwritten. Your edited file will NOT be
overwritten when firmware is updated.
How the Freq/Loss pairs are applied
When the cable file contains one Freq/Loss pair, that correction value is
applied to the entire displayed frequency span.
When the cable file contains two or more Freq/Loss pairs, the Loss value that is
used is interpolated from the Freq/Loss pairs and the DTF center frequency.
For example, using a cable file with the following Freq/Loss pairs:
The center frequency for the measurement is determined from the
calculated (Stop – Start) frequency values (seen on the second page of
DTF Settings):
The Loss value for the measurement is interpolated from the Freq/Loss pairs at
the Center Freq:
4- 24
— Clear All then Yes. Remove all Freq/Loss pairs from the table and
resets header information to default settings.
Done to close the Cable Editor.
Save Cable to saves your changes to the specified Storage Device.
Recall Cable to load a Cable file from the specified Storage Device
Changes the device used to save or recall Cable files. This
1 GHz: 0.1 dB/m
2 GHz: 0.2 dB/m
Calculated Start = 2.0 MHz
Calculated Stop = 3.598 GHz
Center Freq = 1.80 GHz
1 GHz = 0.1 dB/m
17-3). Learn more about Cable files below.
Keysight N9912-90001 User's Guide
"How to use the