Agilent Technologies 8935 series e6380a Using the Spectrum Analyzer’s Delta Markers, Delta Level

Overview of the Test Set’s Built-In Tools

Using the Spectrum Analyzer

Using the Spectrum Analyzer’s Delta Markers

Delta markers are displayed when the Norm/Delta field on the spectrum analyzers Marker menu is set to Delta.

The delta makers are positioned in the same way as the normal markers using the Marker menu of the spectrum analyzer screen. See “Marker To” on page 205

When the delta maker is activated, the Marker To Peak, Next Peak, Center Freq, and Ref Level fields control only the delta marker.

•Peak or Next Peak - The normal marker remains stationary. When a delta marker to center frequency measurement would move the reference marker off the screen, the measurement is aborted and the following message is displayed: Attempt to move Reference Marker off the screen.

•Center Freq or Ref Level - The normal marker moves as necessary to stay at the same signal frequency when the spectrum display changes.

Delta Frequency

The delta marker frequency measurement (Delta Mrkr Freq) is the frequency of the delta marker minus the frequency of the normal marker. If the delta marker is to the right of the normal marker, the delta frequency is positive. If the delta marker is to the left of the normal marker, the delta frequency is negative.

The units for this measurement are GHz, MHz, kHz, and Hz.

Delta Level

The delta marker level measurement (Delta Mrkr Lvl) is the level of the normal marker minus the level of the delta marker in dBm. If the delta marker is higher than normal marker, the delta level is positive. If the delta marker is lower than the normal marker, the delta level is negative.

The units for this measurement are dB. (There is a percent unit available; however, since the spectrum analyzer level is always displayed on a logarithmic scale, linear units are inappropriate.)

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