User`s guide

78 N9320A Spectrum Analyzer

4 Key Reference

VBW/RBW

Auto Man

Sets the ratio between the video and resolution bandwidths.

When a signal is weak and is visually masked by the noise

floor, set the ratio to less than 1 to lower the noise. When

the Preset Type is set to Factory and Preset is pressed, the

ratio is set to 1. Change the ratio by using the arrow keys,

knob, or numeric keypad. When VBW/RBW (Auto) is selected,

the ratio is determined automatically by the rules in

Figure 25.

Figure 25 VBW/RBW Ratio Auto Rules

Key access:

Is Detector peak

or Negative peak?

Is Trace

Average On?

Is Detector

Sample?

Is Avg Type

Power?

Is Trace

Average On?

Is Avg Type

Power?

Ratio=10

Ratio=1

Ratio=10

Ratio=1

Ratio=10

Ratio=1

Yes

BW/

Avg