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SIGLENT
SSA3000X User Manual 19
Figure 2-2 after Peak -> CF
2.1.1.6 CF -> Step
Set the current center frequency as the CF step. At this point, the CF step will switch to “Manual”
mode automatically. This function is usually used with channel switching. Take harmonic waveform
measurement for example: locate a signal at the center frequency of a channel, execute CF->Step
and then press the down direction key continuously to measure each order of harmonic in sequence
2.1.2 Span
Set the span of the analyzer. The change of this parameter will affect the frequency parameters and
restart the sweep.
2.1.2.1 Span
Set the frequency range of the current channel. The center frequency and span are displayed at the
low left and right sides of the grid respectively. In process of using pay attention to the following points：
◆ The start and stop frequency vary with the span when the center frequency is constant.
◆ In manual span mode. The span can be set down to 100Hz and up to the full span described 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.
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