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SIGLENT
User Manual 15
Chapter 2 Spectrum Analyzer
Press Mode, select ‘Spectrum Analyzer’ to enter spectrum analyzer mode.
The ‘Spectrum Analyzer’ mode is the default mode of the analyzer. In this mode, the Mode backlight
does not light up; in other modes, the Mode backlight will light up.
This chapter introduces in detail the function keys and menu functions of the front panel in Spectrum
Analyzer Mode.
2.1 Basic Settings
2.1.1 Frequency
Set the frequency-related parameters and functions of the analyzer. The sweep will restart every time
the frequency parameters are modified.
The frequency range of a channel can be expressed by three parameters: Start Frequency, Center
Frequency and Stop Frequency. If any of the parameters change, the others will be adjusted
automatically in order to ensure the coupling relationship among them:
startstopspan
stopstartcenter
fff
)/2f(ff
−=
+=
, Where
span
f
is the span.
2.1.1.1 Center Frequency
Set the center frequency of the current sweep. The center frequency and span values are displayed at
the bottom of the grid respectively.
● Modifying the center frequency will modify both the start frequency and stop frequency when the
span is constant (except when the start frequency or stop frequency reaches the boundary).
● In Zero Span, the start frequency, stop frequency and center frequency are always the same value.
Table 2-1 Center Frequency
Parameter
Explanation
Default
Full Span/2
Range
Zero Span, 0 Hz ~ Full Span
Nonzero Span, 50 Hz ~ (Full Span -50Hz)
Unit
GHz, MHz, kHz, Hz
Knob Step
Span > 0, step = Span/200, min 1 Hz
Span = 0, step = RBW/100, min 1 Hz
Direction Key Step
Freq Step
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