User`s guide

114 N9320A Spectrum Analyzer
4 Key Reference
Sweep/Trig
Accesses the following softkeys to provide selection of the
sweep mode and trigger mode of the analyzer:
Sweep Time
Auto Man
Selects the length of time the analyzer takes to tune across
the displayed frequency span (or, in zero span, the time the
analyzer takes to sweep the full screen). Reducing the sweep
time increases the sweep rate. Change the sweep time by
using the arrow keys, the knob, or the numeric keypad.
In non- zero spans, when the sweep time is auto- coupled, the
analyzer selects the optimum (shortest) sweep time for the
current settings. This selection process is influenced by
several factors:
• The max. tuning rate of the spectrum analyzer
• The selected resolution and video bandwidth filters
• The max. sample rate of the analog- to- digital converter
• The number of trace points
• The amplitude scale (logarithmic or linear)
• The detector mode
You may select a sweep time less than the auto- coupled
value; however this may generate measurement errors. The
minimum sweep time is 50 ms.
In zero span, the minimum sweep time is determined by the
maximum sample rate of the ADC and the number of sweep
points. The minimum sweep time is 2 microseconds. The
maximum sweep time is 4000 seconds.
Key access:
Sweep
Single
Pressing Sweep Single puts the analyzer in single- sweep
mode. Press Sweep Single to initiate a sweep when in
single- sweep mode.
Key access:
Sweep Cont causes one sweep to follows another as soon as it is
triggered. Pressing Preset (When Preset Type is set to Factory)
sets the sweep mode to continuous sweep.
Key access:
Sweep/
Tri g
Sweep/
Tri g
Sweep/
Tri g