
5Key Reference
76 N9340A User’s Guide
Sweep Time
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) using the knob, the arrow keys, or
numeric keypad.
Key access: [BW/SWP]
In non-zero spans:
When the sweep time is auto- coupled, the analyzer
selects the optimum (shortest) sweep time ranging
from 10 ms to 1000 s for the current settings. This
selection process is influenced by three factors:
• Frequency Span
• The selected Resolution Bandwidth
• The selected Video Bandwidth
Note that changing one of the three factors above
changes sweep time. The sweep time is in direct
ratio to frequency span and is in reverse ratio to
the selected resolution bandwidth and video
bandwidth when auto- coupled.
In zero span:
The auto- coupled status is invalid in zero span.
You can only set the sweep time manually. The
sweep time ranges from 6 s to 200 s in zero span.
NOTE
Reducing the sweep time increases the sweep rate.
CAU-CAUTION
With sweep time set to a value less than the minimum
auto-coupled value, an annotation “Data out of range”
appears in the active function block and the sweep time is
automatically converted to the minimum auto-coupled
value.
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