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104
User Manual
4 Real-Time Spectrum Analyzer Mode
This chapter introduces the function keys and menu functions of the front panel under the
Real-Time Spectrum Analyzer Mode.
4.1 Frequency & SPAN
4.1.1 Frequency & Span
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 these parameters: Start Frequency,
Center Frequency, Stop Frequency and Span. If any of the parameters change, the others will be
adjusted automatically in order to ensure the coupling relationship among them:
start stop span
stop start center
f f f
)/2 f (f f
− =
+ =
, Where
s p a n
f
is the span.
Command Format [:SENSe]:FREQuency:CENTer
[:SENSe]:FREQuency:CENTer?
Instruction Sets the center frequency of the spectrum analyzer.
Gets the center frequency.
Parameter Type Float, unit: Hz, kHz, MHz, GHz
Parameter Range 2.5kHz~27.9999975 GHz
Return Float, unit: Hz
Example :FREQuency:CENTer 0.2 GHz
Command Format [:SENSe]:FREQuency:STARt
[:SENSe]:FREQuency:STARt?
Instruction Sets the start frequency of the spectrum analyzer.
Gets the start Frequency.
Parameter Range 0 Hz ~ 27.9999975 GHz
Example :FREQuency:STARt 100 Hz