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SIGLENT
SSA3000X User Manual 23
in Specifications. When the span is set to the maximum, the analyzer enters full span mode.
Modifying the span in non-zero span mode may cause an automatic change in both CF step
and RBW if they are in Auto mode. Besides, the charge of RBW may influence VBW (in Auto
VBW mode).
Variation in the span, RBW or VBW would cause a change in the sweep time.
In non-zero span mode, neither is ―Video‖ trigger nor ―1/time‖ readout function valid.
You can modify this parameter using the numeric keys, knob or direction keys, For more
details, please refer to ―Parameter Setting‖.
Table 2-5 Span
Parameter
Explanation
Default
Maximum bandwidth
Range
0 Hz~ 3.2GHz
Unit
GHz, MHz, kHz, Hz
Knob Step
Span/200, Min = 1 Hz
Direction Key Step
In 1-2-5 sequence
Related to
Start Freq, Stop Freq, Freq Step, RBW,
Sweep time
Note: 0 Hz is available only in zero span.
2.1.2.2 Full Span
Set the span of the analyzer to the maximum.
2.1.2.3 Zero Span
Set the span of the analyzer to 0Hz. Both the start and stop frequencies will equal the center
frequency and the horizontal axis will denote time. The analyzer measures the time domain
characteristics of the amplitude of the corresponding frequency point on the input signal. In
process of using pay attention to the following points:
The following functions are invalid in Zero span mode: Peak ->CF, Signal Track, Zoom In and
Zoom Out.
Frequency: Peak->CF;
SPAN: Zoom In and Zoom Out;
Marker-> : M ->CF, M->CF step, M->Start Freq, M->Stop Freq, M->CF and M->Span;
Marker: Frequency, Period and 1/Time(valid in Delta marker type);
2.1.2.4 Zoom In
Set the span to half of its current value. At this point, the signal on the screen is zoomed in to
observe signal details.
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