Keysight Technologies N9322C User Manual page 114

Key Reference
BW
BW
106
This hardkey activates the resolution bandwidth function
and accesses the softkey menus that control the bandwidth
and averaging functions.
Res BW
controls the 3 dB resolution bandwidth of the analyzer from
Auto Man
10 Hz to 3 MHz using the knob or arrow keys. There are
four available bandwidths less than 1 KHz are 10, 30, 100 Hz
or 300 Hz. If an invalid bandwidth is entered using the
numeric keypad, the analyzer chooses the closest acceptable
bandwidth. As the resolution bandwidth is decreased, the
sweep time is modified in order to maintain amplitude
accuracy. Resolution bandwidth is also coordinated with the
frequency span. As the span is decreased, the resolution
bandwidth decreases. When the VBW/RBW is set to AUTO, if
the resolution bandwidth changes, the video bandwidth
changes to maintain the VBW/RBW ratio.
A "#" mark appears next to "Res BW" on the display when it
is not coupled. To recouple the resolution bandwidth, press
Res BW (Auto).
Key access: BW > RBW
Video BW
changes the analyzer post- detection filter from 1 Hz to 3
Auto Man
MHz using the knob or arrow keys. If an invalid bandwidth
is entered, the analyzer chooses the closest available
bandwidth. As the video bandwidth decreases, the sweep
time will increase to maintain amplitude accuracy.
A "#" mark appears next to "VBW" on the bottom of the
analyzer display when it is not coupled. To couple the video
bandwidth, press Video BW (Auto).
Key access: BW > VBW
VBW/RBW
Sets the ratio between the video and resolution bandwidths.
Auto Man
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,