22 FieldFox User’s Guide
o Insertion Loss (2-Port) 2-port transmission measurement that accurately
displays the loss through a cable or other device in dB. Both ends of the
cable must be connected to the FieldFox. NO phase information is included
in this measurement. Learn more on page 29. This feature is available only
with an option on some FieldFox models. For detailed information, please
view the FieldFox Configuration Guide at:
http://cp.literature.agilent.com/litweb/pdf/5990-9836EN.pdf
o DTF (Lin) Distance to Fault in Linear format.
Coupled Frequency
This setting is available ONLY when a Return Loss & DTF measurement is
present and the DTF measurement is active. Otherwise, Coupled Frequency is set
to ON and can NOT be changed.
Coupled Frequency ON (default setting) – Both traces have the same frequency
range settings.
Coupled Frequency OFF - Both traces are allowed to have individual frequency
range settings. When set to OFF:
The Return Loss measurement frequency settings are made in the usual
manner. Learn how on page 23. When a new Start or Stop frequency is
selected, Coupled Frequency is automatically set to OFF.
The DTF measurement is made using the frequencies as determined by the
DTF Frequency Mode setting. Learn more on page 32.
How to set Coupled Frequency
With a Return Loss & DTF measurement present:
Press Meas Setup 4
Select the DTF measurement (Tr2) using the ▲|▼ arrows.
Then Coupled Freq ON OFF
Quick Settings Table
Both CAT and NA Modes allow you to view and change most relevant settings
from a single location. All of these settings are discussed in this chapter and,
unless otherwise noted, ALL of these settings can also be made using the
standard softkey menus.
How to view and change Quick Settings
Press Meas Setup 4.
Then Settings.
Press Next Page and Previous Page to view all settings. If these softkeys are
NOT available, then all available settings fit on one page.
To change a setting:
o Use the ▲|▼ arrows to highlight a setting.
o Then press Edit. The current setting changes to yellow.
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