188 Keysight N9927-90001 User’s GuideSA (Spectrum Analyzer) ModeSA Mode SettingsIf the Detection method and Averaging type are set to Auto when you enable aBand/Interval Power marker, the Detection method will change to Average(RMS) and Averaging type will change to Power average. Other Detectionmethods or Averaging type settings will usually cause measurementinaccuracy. Learn more about Detection method in “Detection Method” onpage 184, and Averaging Type in “Average Type” on page 176.Summary:— In Zero span, an Interval Power Marker yields the average power over thespecified time interval.— In non-Zero span, a Band Power Marker yields the total power over thespecified frequency range.How to measure Band/Interval Power with a marker— Press Marker to create or select a Normal or Delta marker to use tomeasure Band/Interval Power.— Then press More— Then Marker Function— Then Band/Int Power— Then Band (or Interval) Span— Then choose from the following:—Auto Measures power over 5% of the displayed span, or ½ graticules.The Band Span is automatically updated to remain at 5% when youchange the frequency span.—Man Enter a frequency or time value using the arrows or therotary knob, then press Enter. Or enter a value using the numerickeypad and select a frequency or time suffix. The Band Span remainsat the frequency or time value that you set as the span changes.Frequency Counter at Marker— Available in SA Mode ONLY. Use any existing marker to makehighly-accurate frequency counter readings. For highest accuracy, lock theFieldFox to a stable external frequency reference. Learn how in “FrequencyReference Source” on page 492.When Frequency Counter is ON, the FieldFox uses background sweeps tozoom on the signal, measure the signal peak with 1 Hz resolution, and displaythe frequency of the signal peak in the marker annotation area. The markerdoes not move to the signal peak.When Freq Counter is ON, measurement sweeps are considerably slower.
