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Video Bandwidth
Set Video Bandwidth, shortform is VBW, to filter the noise out of the video band.
Key Points:
•
Reduce VBW can make the spectral line be smooth, and the small signal which is
submerged in noise can stand out. But the scan time will be longer. (When scan time is
automatic, it is influenced by RBW and VBW together).
•
When VBW is automatic, it changes with RBW. But it is not influenced by RBW when
manually.
•
You can use numeric keys, knobs or direction keys to modify this parameter. The detail
method refers to the specification in "Parameter Setting".
VBW Reference
Parameter
Default
Range
Unit
Knob Step
Direction Key Step
V/R Ratio
Set the ratio of VBW and RBW.
Key Points:
•
Choose the ratio according to different signals:
•
When measure sine signals, normally choose 1~3 (to get shorter scan time). When measure
pulse signals, choose 10 (to reduce the influence to the amplitude of nstantaneous signal).
When measure noise signals, normally choose 0.1 (to get the average value of noise).
•
You can use numeric keys, knobs or direction keys to modify this parameter. The detail
method refers to the specification in "Parameter Setting".
V/R Ratio Reference
Parameter
Default
Range
Unit
Knob Step
Direction Key Step
3.2.2 Sweep
Set parameters about the Sweep and Trigger functions, including Time, Auto SWT, Mode,
Numbers, Trigger type, etc.
Mode
Set the sweep mode to "Single" or "Continue", the default is "Continue". The corresponding icon
of the sweep mode will be displayed in the status bar at the left side of the screen.
Instruction
1 MHz
1 Hz to 1 MHz
GHz, MHz, kHz, Hz
in 1, 3, 10 sequence
in 1, 3, 10 sequence
Instruction
1 MHz
0.000001 ~ 30000
N/A
in 1, 3, 10 sequence
in 1, 3, 10 sequence
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