Cat Mode Settings - Agilent Technologies FieldFox N9912A User Manual

CAT Mode Settings

Select CAT Mode before making any setting in this chapter.
How to select CAT Mode
 Press Mode.
 Then CAT.
Measurement Selection
How to select a CAT Mode Measurement
Learn more about the following measurements in the Supplemental Online
Help: http://na.tm.agilent.com/fieldfox/help/.
 Press Measure 1.
 Then choose one of the following: These softkeys also appear after CAT Mode
NOTE
20
is selected.
1-port reflection measurement that uses Inverse Fast
Distance to Fault
o
Fourier Transform (IFFT) calculations to determine and display the distance
to, and relative size of, a fault or disruption in the transmission line. Units
are in return loss format, expressed as a positive number in dB, unless the
measurement selected is DTF (VSWR). Learn more about DTF Measurements
on page 28.
Return Loss & DTF
o
and a Distance to Fault measurement in the bottom plot. Use this format to
display the frequency settings that are used to make the DTF measurement.
Learn more about Bandpass Mode on page 30.
All plot settings, such as Scale, Markers, and so forth, are made to the DTF
(bottom) plot, NOT to the Return Loss (top) plot. However, the frequency
range of the Return Loss plot can be changed using the Alternate Sweep
setting. Learn more on page on page 34.
1-port reflection measurement that displays the amount of
Return Loss
o
incident signal energy MINUS the amount of energy that is reflected. The
higher the trace is on the screen, the more energy being reflected back to the
FieldFox. Learn how to measure Return Loss on page 24.
(Voltage Standing Wave Ratio – also known as SWR) 1-port reflection
VSWR
o
measurement that displays the ratio of the maximum reflected voltage over
the minimum reflected voltage. The higher the trace is on the screen, the
more energy being reflected back to the FieldFox.
Distance to Fault in VSWR format.
DTF (VSWR)
o
1-port reflection measurement that displays the loss of a
1-Port Cable Loss
o
transmission line. Learn more on page 24.
2-Port Insertion Loss
o
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 27.
Displays a Return Loss measurement in the top plot
(Option 110 ONLY) 2-port transmission measurement
N9912A FieldFox User's Guide