RIGOL Front Panel Key Reference
2-22 User’s Guide for DSA1000 Series
Key Points:
Reducing the VBW to smooth the spectrum line and differentiate small signals
from the noise. However, this may cause a longer sweep time. (Sweep Time is
effected by a combination of RBW and VBW when it is in Auto mode).
VBW varies with RBW when it is set to Auto.
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
2.2.1.3 V/R Ratio
Sets the ratio of VBW to RBW.
Key Points:
This value is different while measuring different kinds of signals:
Sine signal: use 1 - 3 (for faster sweeps)
Pulse signal: use 10 (to reduce the influence on the amplitude of transient
signals)
Noise signal: 0.1 is perfect (to obtain an average of noises)
You can modify this parameter using the numeric keys, knob, or direction keys.
For more details, please refer to “Parameter Input”.
Table 2-15 V/R Ratio
Default 1
Range 0.0000010 to 300000.00
Unit N/A
Knob Step in 1, 3, 10 sequence
Direction Key Step in 1, 3, 10 sequence
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