Keysight Technologies FieldFox A Series, Руководство пользователя

Страница: 47 / 756

Keysight N9927-90001 User’s Guide 47
CAT (Cable and Antenna Test) Mode
CAT Mode Settings
CAT Mode Settings
Select CAT Mode before making any setting in this chapter.
How to select CAT Mode
— Press Mode .
— Then CAT/TDR .
Measurement Selection
How to select a CAT Mode Measurement
Learn more about the following measurements in the Supplemental Online
Help: http://na.support.keysight.com/fieldfox/help/SupHelp/FieldFox.htm
Press Measure 1 .
Then choose one of the following: These softkeys also appear after CAT Mode
is selected.
— Distance To Fault 1-port reflection measurement that uses Inverse Fourier
Transform (IFT) 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 refer to Chapter 4, “DTF (Distance to Fault)
Measurements.” .
— Return Loss & DTF Displays both a Return Loss measurement and a DTF
measurement. Use this format to display the frequency settings that are
used to make the DTF measurement. The frequency range settings for these
two measurements can be coupled or uncoupled. Learn more on page 54 .
Calibrations are applied to both traces
When in Hold mode and Single sweep is performed, only the active
trace is triggered. Use the
arrows to activate a trace
— Return Loss 1-port reflection measurement that displays the amount of
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 55 .
— VSWR (Voltage Standing Wave Ratio – also known as SWR) 1-port
reflection 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.
— DTF (VSWR) Distance to Fault in VSWR format.