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Range
Unit
Knob Step
Direction Key Step
RF Preamp
Set the status of the preamplifier located at the front of the RF signal path. Turning on the
preamplifier reduces the displayed average noise level in order to distinguish small signals from
the noise when the signal under measurement is small.
Key Points:
The corresponding icon
the preamplifier is On.
Scale Value
Scale Value is on the left of display area. Select "ON", display. Select "OFF", do not display.
3.2 Sweep and Function Settings
3.2.1 BW
Set the RBW (Resolution Bandwidth), VBW (Video Bandwidth) and detector type parameters of
the analyzer.
RBW
Set the desired resolution bandwidth in order to distinguish between signals which are close in
frequency.
Key Points:
•
Reducing RBW will increase the frequency resolution, but will increase the sweep time
(Sweep Time is affected 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.
•
You can modify this parameter using the numeric keys, knob or direction keys. For more
details, please refer to "Parameter Setting".
Note: if detector type is "Quasi-Peak" or filter type is "EMI", RBW can be 200 Hz, 9 kHz or 120
kHz only.
RBW (Filter Type is Gauss)
Parameter
Default
Range
Unit
Knob Step
Direction Key Step
Video Bandwidth
Set Video Bandwidth, shortform is VBW, to filter the noise out of the video band.
-300 dB to 300 dB
dB
N/A
N/A
will be displayed in the status bar at the left side of the screen when
Explanation
1 MHz
100 Hz to 1 MHz
GHz, MHz, kHz, Hz
in 1, 3, 10 sequence
in 1, 3, 10 sequence
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