Datasheet

5.2. VBW
Set the VBW (Video Bandwidth) in order to remove the band noise.
Key points:
 Reducing the VBW to smooth spectrum line and differentiate small signal from the noise, but
also will cause the longer sweep (In Auto Sweep mode, sweep time will be affected both by
RBW and VBW).
 In Auto mode, VBW will change with RBW, but not affected by RBW in Manual mode.
 You can modify this parameter by numeric keys, knob and arrow keys. For more details, please
refer to “Parameter Input”.
Table 2-13 VBW
5.3. V/R Ratio
Set the ratio of VBW to RBW. If the response of signal is very close to noise level, to avoid the signal
to be covered by noise, you need to set the ratio less than 1 to reduce noise.
Key points:
 Select right V/R Ratio while measuring different kinds of signal:
Sine signal: Select 1 to 3 (for faster sweeps).
Pulse Signal: Select 10 (reduce the influence on amplitude of transient signals)
 You can modify this parameter by numeric keys, knob and arrow keys. For more details, please
refer to “Parameter Input”.
Table 2-14 V/R Ratio
-22-
Parameter
Description
Default
1 MHz
Range
1 Hz ~ 1 MHz
Unit
GHz, MHz, kHz, Hz
Knob Step
In 1-3-10 sequence
Arrow Keys Step
In 1-3-10 sequence
Parameter
Description
Default
1
Range
0.000001 ~ 100000
Unit
No
Knob Step
In 1-3-10 sequence
Arrow Keys Step
In 1-3-10 sequence