Rigol DSA800 Series User Manual

RIGOL Chapter 2 Front Panel Operation
User’s Guide for DSA800/E Series
2-24
VBW
Set the desired video bandwidth in order to filter out the noise outside the video
band.
Key Points:
 Reducing the VBW will smooth the spectrum line to differentiate small signals
from noise, but will increase the sweep time (Sweep Time is affected by a
combination of RBW and VBW when it is in Auto mode).
 VBW varies with RBW when it is set to Auto. While in Manual mode, VBW is
not affected by RBW.
 You can modify this parameter using the numeric keys, knob or direction keys.
For more details, please refer to “Parameter Setting”.
Table 2-14 VBW
Parameter Explanation
Default 1 MHz
Range 1 Hz to 3 MHz
Unit GHz, MHz, kHz, Hz
Knob Step
in 1, 3, 10 sequence
Direction Key Step
in 1, 3, 10 sequence
V/R Ratio
Set the ratio of VBW to RBW.
Key Points:
 This value is different while measuring different kinds of signals:
Sine signal: use 1 to 3 (for faster sweeps)
Pulse signal: use 10 (to reduce the influence on the amplitude of transient
signals)
Noise signal: generally use 0.1 (to obtain the average of noises)
 You can modify this parameter using the numeric keys, knob or direction keys.
For more details, please refer to “Parameter Setting”.

Rigol DSA800 Series Specifications

General

Brand	Rigol
Model	DSA800 Series
Category	Measuring Instruments
Language	English