Filter
Top Products
Chapter 4 113
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.)