resolution, but may also cause sweeps to take longer (Sweep
Time is effected by a combination of RBW and VBW when it is in
Auto mode).
⚫
RBW decreases with the span (non-zero span) in Auto RBW
mode.
5.5.2 [RBW Mode Def Cont]
Adjust resolution step mode, resolution mode can be set to 1-3-5,
Default or Continuous mode.
5.5.3 [VBW Auto Man]
Sets the desired video bandwidth in order to remove the band
noise. Set the video resolution displays in function area, ranging
from 10Hz to 1MHz by sequence step. You can modify this
parameter by numeric key, step key or knob. The underline under
Auto or Manual means Auto mode or Manual mode. Press [VBW
Auto Manual] and hold it in manual until the underline highlighted
under Auto to return auto mode.
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.
5.5.4 [Average On Off]
Trace average function. It doesn’t need narrow VBW to implement
smooth trace. This function set the wave detector to acquisition
mode, continuously get average of the trace to smooth it.
5.5.5 [EMI Filter►]
Pop out the menu for EMI measurement bandwidth.
1) [EMI Filter On Off]
Turn on or off EMI measurement resolution bandwidth.
2) [1MHz]
Set EMI measurement resolution to 1MHz.
3) [120kHz]
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