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FFTMKR
FFT Markers
Activates the
FFI’
markers and displays the FFT annotation on the spectrum analyzer display.
Syntax
FFTMKR
Equivalent
Softkey:
FFT MARKERS .
Related Commands:
FFTCONTS,
FFTOFF,
FFISNGLS,
FFTPCTAM, FFTPCTAMR, MKA, MKF.
Example
OUTPUT
718;"RCLT
TRA,l;"
Recalls the
FFl’
trace.
OUTPUT
718;"FFTMKR;"
Activates the FFT
markers.
Description
If the spectrum analyzer is
not
performing an FFT measurement, the FFTMKR command
displays the FFT annotation below the last graticule on the spectrum analyzer display, and
activates the marker in the
FFT
readout mode. (FFTMKR uses the current sweep time to
determine the FFT stop frequency that is displayed.) If the spectrum analyzer is already
performing an
FFI’,
executing FFI’MKR activates only the FFT markers. You need to execute
FFIOFF to exit out of the FFT measurement and return to normal spectrum analyzer
operation.
Restrictions
Executing FFTMKR turns off the following functions: windows display mode
(WINON),
N
dB
point measurement (NDBPNT), gate utility functions (GDRVUTIL), TO1 measurement
(TOI),
marker table (MKTBL), peak table (PKTBL), percent AM (PCTAM), peak zoom (PKZOOM),
power menu measurements (ACP, ACPE, CHP, and OBW), and Analog+ display mode
(ANLGPLUS).
The purpose of the
FFIMKR
command is to allow you to restore the FFT annotation when you
recall FFT trace data (the
FFI
annotation is not saved when you save trace data). The percent
AM readout can also be restored by executing the FFTPCTAM command after FFTMKR. (See
“FFI’PCTAM” for more information about the percent AM measurement.)
You can use the MKF or MKA commands to determine the amplitude or frequency of an
FFI’
marker.
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Programming Commands