Chapter 2 79
Front-Panel Key Reference
BW/Avg
VBW/RBW
Auto Man
Selects the ratio between the video and resolution bandwidths. If signal 
responses near the noise level are visually masked by the noise, the 
ratio can be set to less than 1 to lower the noise. The knob and step keys 
change the ratio in a 1, 3, 10 sequence. When 
Preset Type is set to 
Factory and Preset is pressed or Auto Couple, Auto All have been selected, 
the ratio is set to 1.000 X. The ratio can be changed using the step keys, 
knob, or numeric keypad. When 
VBW/RBW (Auto) is selected, the ratio is 
determined by the rules in Figure 2-3.
Figure 2-3  VBW/RBW Ratio Auto Rules
Key Access: 
BW/Avg