FFT MARKERS

FFT

Menu

S p e c t r u m A n a l y z e r M o d e Kay D e s c r i p t i o n s

Spectrum Analyzer Mode Functions

if the FFT mode is already active, pressing FFT MARKERS only activates the FFT markers. If the FFT mode is not active, then the FFT marker will be activated and the FFT annotation will be displayed but an FFT will not be performed. Pressing the % AM ON OFF key will give a valid

value for the signal in trace B. Press FFT OFF to return the analyzer to normal operation.

An FFT trace can be saved and recalled. If a trace has been recalled, FFT MARKERS can be used to activate the markers so that the trace can be evaluated.

Front-Panel Key Access (MEAS/USER)

accesses the menu of keys to initiate and evaluate a Fourier transform of the analyzer displayed data. Activating other analyzer functions will automatically exit the FFT function or will corrupt the display. See Table 6-6.

Table 6-6. Compatibility of FFT With Other Functions

 

Function

Compatibility Info

 

Catalog functions

corrupts

the

display

 

DLP Editor

 

 

corrupts

the

display

 

Marker Table

 

 

exits FFT

 

 

 

N dB Points

measurement

exits

FFT

 

 

 

Peak Table

 

 

exits

FFT

 

 

 

Power Menu

measurementsi

e x i t s

FFT

 

 

 

 

 

 

 

corrupts

the

display

 

Time Gate functions

exits

FFT

 

 

 

TOI m e a s u r e m e n t

exits

FFT

 

 

 

 

 

 

exits

FFT

 

 

 

 

 

 

 

 

 

 

Front-Panel Key Access (MEAS/USER)

6-71