Keysight E6680A - Length Ctrl; Window Length

3 IQ Analyzer (Basic) Mode
3.1 Complex Spectrum Measurement
Remote
Command
Complex Spectrum:
[:SENSe]:SPECtrum:FFT:WINDow[:TYPE] FLATtop | UNIForm | HANNing | HAMMing |
GAUSsian | BLACkman | BH4Tap | KB70 | KB90 | KB110
[:SENSe]:SPECtrum:FFT:WINDow[:TYPE]?
Streaming:
[:SENSe]:STReaming:FFT:WINDow[:TYPE] FLATtop | UNIForm | HANNing | HAMMing |
GAUSsian | BLACkman | BH4Tap | KB70 | KB90 | KB110
[:SENSe]:STReaming:FFT:WINDow[:TYPE]?
Example
:SPEC:FFT:WIND KB90
:SPEC:FFT:WIND?
Notes Affects the acquisition point quantity and the FFT size, based on the resolution bandwidth selected
Preset
FLATtop
State Saved Yes
Range Flat Top (High AmptdAcc) | Uniform | Hanning | Hamming | Gaussian (Alpha3.5) | Blackman | Blackman-
Harris | K-B 70 dB (Kaiser-Bessel) | K-B 90 dB (Kaiser-Bessel) | K-B 110 dB (Kaiser-Bessel)
Length Ctrl
Provides control of the FFT window or length settings. Press Length Ctrl (Auto) to
disable the FFT window or length settings. This setting is directly coupled to "Res
BW" on page 186 as follows: Enabling Length Ctrl disables Res BW, while disabling
Length Ctrl allows Res BW control.
Remote
Command
Complex Spectrum:
[:SENSe]:SPECtrum:FFT:LENGth:AUTO ON | OFF | 1 | 0
[:SENSe]:SPECtrum:FFT:LENGth:AUTO?
Streaming:
[:SENSe]:STReaming:FFT:LENGth:AUTO ON | OFF | 1 | 0
[:SENSe]:STReaming:FFT:LENGth:AUTO?
Example
:SPEC:FFT:LENG:AUTO 0
:SPEC:FFT:LENG:AUTO?
Preset
ON
State Saved Yes
Range Auto | Man
Window Length
Lets you set the FFT window length. This value is only used if Length Ctrl is set to
Manual. This is an advanced control that normally does not need to be changed.
241 IQ Analyzer Mode User's &Programmer's Reference