RIGOL
Chapter 2 Functions of the Front Panel of GPSA
2-8
RSA3000E User Guide
SPAN
Sets the span of the analyzer. Changing this parameter will change the frequency
parameters, and after the span is changed, the sweep restarts.
Span
Sets the frequency range of the current channel. Press this key or touch the specified
menu item on the screen to set the frequency entry mode to Center Frequency/Span.
The center frequency and span values are respectively displayed at the lower left and
right side of the graticule.
Remarks:
When you modify the span, the start and stop frequency will be modified
automatically, with the center frequency remains to be unchanged.
In non-zero span, the span can be set to a minimum of 10 Hz. When the span is
set to a maximum value, the spectrum analyzer enters the full span mode.
You can set the span to 0 Hz manually; you can press the Zero Span menu item
or run the SCPI commands to enter the zero span mode.
When you modify the span in non-zero span mode, both CF step and RBW will
be changed automatically if they are in Auto mode. Besides, the change of RBW
will change the value of VBW (in Auto VBW mode).
Any variation in span, RBW, or VBW would cause a change in the sweep time.
You can use the numeric keys, the knob, and the arrow keys on the front panel
to modify this parameter; also you can modify it on the touchscreen. For details,
refer to descriptions in "Parameter Setting".
Table 2-6 Span
Parameter
Remarks
Default
Fmax
Range
[1]
0 Hz, 10 Hz to Fmax
Unit
GHz, MHz, kHz, Hz
Knob Step
span > 0, step = span/200
span = 0, step = 10
Min = 2 Hz
Left/Right Arrow Key Step
Up/Down Arrow Key Step
at 1-2-5 step
Note
[1]
: When the span of the analyzer is set to 0 Hz, the spectrum analyzer enters the zero span
mode.
Last Span
Sets the span to the previous span setting.
