ADInstruments AD8000 Series Instruction Manual page 85

AD8000 Series Spectrum Analyzer Instruction
Manual
If there is no marker on, the system will automatically turn on the normal
marker. If there are some markers on, the state of these markers will
remain unchanged.
(1) Normal Marker
After pressing the 'Mkr Normal' soft-key or pressing NORMAL key while no
marker is on, the normal marker will appear on x-axis at the center of the
screen moving up and down with the change of the amplitude. At the same
time the amplitude and frequency/time information of this marker will be
displayed on the up-right of the screen.
The signal amplitude would be read directly after turning on the marker.
Generally AD8000 series spectrum analyzer displays 2 digits after the decimal
point to show the amplitude in log unit. In linear unit 5 significant digits
would be saved.
When the span is zero, the wave display on the screen is a time domain
wave, so the x-axis changes from frequency to time. The start time is zero
and the stop time is equal to sweep time. The displayed marker
information changes to time as well.
The y-axis of the marker is signal amplitude which is not changeable. The
x-axis could be changed in 3 methods:
a) Press 'Up/Down' key. The step change of this method is 1/10 of span.
Fig. 3-47 Mark Menu (Page 2)
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