3 Spectrum Analyzer Mode
3.9 SEM Measurement
When this parameter is on and the following conditions are met, the measurement is
performed with a single I/Q acquisition.
–
Stop Freq of the outermost Offset range is within the available IQ acquisition BW
–
Same RBW, VBW, Detector Type settings across all Offset ranges and Carrier
–
Sweep Type = FFT and Sweep Time = Auto across all Offset ranges and Carrier
Remote Command
[:SENSe]:SEMask:WBFFt:ENABle ON | OFF | 1 | 0
[:SENSe]:SEMask:WBFFt:ENABle?
Example
:SEM:WBFF:ENAB 1
:SEM:WBFF:ENAB?
Dependencies The maximum FFT BW depends on the µW preselector and the current frequency. In hi-band, the µW
preselector must be disabled to apply the FFT with wideband IF. Otherwise, the maximum FFT BW is
limited to 40MHz
Preset
OFF
State Saved Saved in instrument state
Range
ON|OFF
3.9.18.6 Global
The controls in this menu apply to all Modes in the instrument.
Some controls (for example, "Global Center Freq" on page 2034) allow you to switch
certain Meas Global parameters to a Mode Global state. These switches apply to all
Modes that support global settings. For example, no matter what Mode you are in
when you set Global Center Freq to ON, it applies to all Modes that support Global
settings.
Other controls (for example, Extend Low Band) are actually set in this menu, but
apply to all Modes.
Global Center Freq
The software maintains a Mode Global value called Global Center Freq.
When Global Center Freq is switched ON, the current Mode’s center frequency is
copied into the Global Center Frequency, and from then on all Modes that support
global settings use the Global Center Frequency, so you can switch between any of
these Modes and the Center Frequency remains unchanged.
Adjusting the Center Frequency of any Mode that supports Global Settings, while
Global Center Freq is ON, modifies the Global Center Freq.
1722 Spectrum Analyzer Mode User's &Programmer's Reference
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