Anritsu Spectrum Master MS2720T, User Manual

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3-14 BW (Bandwidth) Menu Interference Analyzer (Option 25)
3-40 PN: 10580-00349 Rev. H Spectrum Analyzer MG
3-14 BW (Bandwidth) Menu
Key Sequence:
BW
RBW: The current resolution bandwidth value is displayed in this submenu
key. The key displays the Zero Span RBW if Zero Span is selected. The RBW
can be changed using the keypad, the arrow keys, or the rotary knob.
Bandwidth values increment in a 1 to 3 sequence, from 1 Hz to 3 Hz to 10 Hz,
or from 10 Hz to 30 Hz to 100 Hz, for example. Refer to your instrument
Technical Data Sheet for the resolution bandwidth range.
Auto RBW On/Off: When Auto RBW is On, the instrument selects the
resolution bandwidth based on the current span width. The ratio of span width
to RBW can be specified using the Span/RBW submenu key.
VBW: The current video bandwidth value is displayed in this submenu key.
The key displays the Zero Span VBW if Zero Span is selected. The VBW can
be changed using the keypad, the arrow keys, or the rotary knob. Bandwidth
values increment in a 1 to 3 sequence, from 1 Hz to 3 Hz to 10 Hz, or from
10 Hz to 30 Hz to 100 Hz, for example. Refer to your instrument Technical
Data Sheet for the video bandwidth range.
Auto VBW On/Off: When Auto VBW is On, the instrument selects the video
bandwidth based on the resolution bandwidth. The ratio of video bandwidth to
resolution bandwidth can be set using the RBW/VBW submenu key.
VBW/Average Type: Toggles between Linear averaging (arithmetic mean)
and Logarithmic averaging (geometric mean).
RBW/VBW: This submenu key displays the ratio between resolution
bandwidth and video bandwidth. To change the ratio, press this submenu key
and use the keypad, the arrow keys, or the rotary knob to select a new ratio.
The default ratio is 3. When the quasi-peak detector is selected the
RBW/VBW ratio is changed to 1.
Span/RBW: This submenu key displays the ratio between the span width
and the resolution bandwidth. The default value is 100, meaning that the span
width is approximately 100 times the resolution bandwidth. The value is
approximate because resolution bandwidth filters come in discrete steps
while span width can be set to any value up to the limit of the instrument.
To change the ratio, press this submenu key and use the keypad, the arrow
keys, or the rotary knob to select a new ratio.
Figure 3-33. IA Bandwidth Menu
BW
RBW
3 MHz
VBW
1 MHz
RBW/VBW
3
Span/RBW
100
Auto RBW
On Off
Auto VBW
On Off
VBW/Average Type
Linear Log
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