Keysight N9923-90001 User’s Guide83CAT (Cable and Antenna Test) ModeCAT Mode SettingsOutput PowerSet the power level out of the FieldFox to High, Low, or manually set powerlevel to a value between High and Low.Generally, the high power setting is used when measuring passive, high-lossdevices to place the signal farther from the noise floor. However, for devicesthat are sensitive to high power levels such as amplifiers, use the Low powersetting.For best measurement accuracy, use the Manual power setting at -15 dBm.After calibration, the power level can be decreased for amplifiers, or increasedfor higher dynamic range.How to set Output Power— Press Meas Setup 4.— Then Power— Then Output Power—High (Default setting) Sets output power to the maximum achievablepower at all displayed frequencies. Output power is NOT FLAT acrossthe displayed FieldFox frequency span. Please see“Specifications/Data Sheet” on page 263 for expected power levels.—Low Sets output power to approximately –45 dBm, FLAT across thedisplayed FieldFox frequency span.—Man Set output power to an arbitrary value, FLAT across the displayedFieldFox frequency span. If flattened power can NOT be achieved, awarning message and beep occurs. To achieve a flattened outputpower, reduce the power level or stop frequency.—Then press Nominal Power—Then enter a value using the numeric keypad, the arrows, or therotary knob.Power Level settings in this mode will NOT change Power Level settings inother modes. To help prevent damage to your DUT, use caution whenchanging modes with your DUT connected to the FieldFox test ports.
