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3.5
Bandwidth / Average Settings
BW/AVG key sets the resolution bandwidth (RBW), video bandwidth (VBW) and
averaging functions. The resolution, sweep time, and averaging are in a trade-
off relationship, so configuration should be done with care.
3.5.1
Resolution Bandwidth Setting (RBW)
Description
►
RBW (Resolution Bandwidth) defines the width of the IF (intermediate
frequency) filter that is used to separate signal peaks from one another. The
narrower the RBW, the greater the capability to separate signals at close
frequencies. But it also makes the sweep time longer under specific frequency
spans (the display is updated less frequently).
SPAN-RBW Auto relationship
►
When the RBW is set to Auto, the RBW is determined by the frequency span.
This is shown in the table below.
SPAN-RBW relationship in Auto mode.
►
Span (Hz) = RBW (Hz)
200
650
2 k
6.5 k
20 k
200 k
Operation
►
Press
Set the resolution bandwidth and unit for Man mode.
Mode: Auto, Man
Frequency Range (3dB): 1 Hz ~ 1 MHz (1-3-10 step)
Frequency Range (6dB): 200 Hz, 9 kHz, 120 kHz, 1 MHz
February 2017
Span (Hz) = RBW (Hz)
1
650 k
3
2 M
10
6.5 M
30
20 M
100
65 M
1000
200 M
> RBW[F1] and set the RBW to Auto or Man.
3 000
10 000
30 000
100 000
300 000
1 000 000
42
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