Keysight N9927-90001 User’s Guide 45CAT (Cable and Antenna Test) ModeCAT Mode SettingsCAT Mode SettingsSelect CAT Mode before making any setting in this chapter.How to select CAT Mode— Press Mode.— Then CAT/TDR.Measurement SelectionHow to select a CAT Mode MeasurementLearn more about the following measurements in the Supplemental OnlineHelp: http://na.support.keysight.com/fieldfox/help/SupHelp/FieldFox.htmPress Measure 1.Then choose one of the following: These softkeys also appear after CAT Modeis selected.— Distance To Fault 1-port reflection measurement that uses Inverse FourierTransform (IFT) calculations to determine and display the distance to, andrelative size of, a fault or disruption in the transmission line. Units are inreturn loss format, expressed as a positive number in dB, unless themeasurement selected is DTF (VSWR). Learn more about DTFMeasurements refer to Chapter 4, “DTF (Distance to Fault)Measurements.”.— Return Loss & DTF Displays both a Return Loss measurement and a DTFmeasurement. Use this format to display the frequency settings that areused to make the DTF measurement. The frequency range settings for thesetwo measurements can be coupled or uncoupled. Learn more on page 52.Calibrations are applied to both tracesWhen in Hold mode and Single sweep is performed, only the activetrace is triggered. Use the arrows to activate a trace— Return Loss 1-port reflection measurement that displays the amount ofincident signal energy MINUS the amount of energy that is reflected. Thehigher the trace is on the screen, the more energy being reflected back tothe FieldFox. Learn how to measure Return Loss on page 53.— VSWR (Voltage Standing Wave Ratio – also known as SWR) 1-portreflection measurement that displays the ratio of the maximum reflectedvoltage over the minimum reflected voltage. The higher the trace is on thescreen, the more energy being reflected back to the FieldFox.— DTF (VSWR) Distance to Fault in VSWR format.
