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SIGLENT
6.1.1.5 Freq Step
Setting the value of Freq Step will change the direction key step of center frequency, start frequency,
stop frequency and frequency offset.
● At a fixed step change the value of the center frequency can reach the purpose of switching
measurement channels rapidly and continuously.
● There are two kinds of frequency step modes：Auto and Manual. In Auto mode, the Freq step is
1/10 of the span. In Manual mode, you can set the step using the numeric keys.
Table 6-5 Freq Step
Parameter
Explanation
Default
Full Span/10
Range
1Hz ~ 40MHz
Unit
GHz, MHz, kHz, Hz
Knob Step
Step = Span/200
Direction Key Step
In 1-2-5 sequence
Related to
RBW, Span and related parameters
6.1.2 Span
Set the span of the analyzer. Any change of this parameter will affect the frequency parameters and
restart the sweep.
6.1.2.1 Span
Set the frequency range of the current sweep. The center frequency and span are displayed at the
bottom of the grid respectively.
● The start and stop frequency vary with the span when the center frequency is constant.
● The span can be set down to 5 kHz and up to 40 MHz described in Specifications. The maximum
span is the maximum real-time analysis bandwidth of the real-time spectrum analyzer.
● Modifying the span may cause an automatic change in both Freq Step and RBW if they are in Auto
mode.
● Variation in the span, RBW would cause a change in the acquisition time.
Table 6-6 Span
Parameter
Explanation
Default
40 MHz
Range
0 Hz ~ 40 MHz
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, Acq time
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