3 IQ Analyzer (Basic) Mode
3.1 Complex Spectrum Measurement
The “points” is the number of points for IQ pairs. For example, if Window Length is
set to 10, it means the window length is for 10 I and 10 Q points, not 5 I and 5 Q
points.
Remote Command Complex Spectrum:
[:SENSe]:SPECtrum:FFT:WINDow:LENGth <integer>
[:SENSe]:SPECtrum:FFT:WINDow:LENGth?
Streaming:
[:SENSe]:STReaming:FFT:WINDow:LENGth <integer>
[:SENSe]:STReaming:FFT:WINDow:LENGth?
Example
:SPEC:FFT:WIND:LENG 100
:SPEC:FFT:WIND:LENG?
Dependencies Grayed-out when Length Ctrl is set to Auto
Preset 237
When Option DP2, B40, or wider IF Bandwidth option is not installed, the Preset value is 355
State Saved Yes
Min 8
Max 8000000
FFT Length
Lets you set the FFT length. This value is only used if Length Ctrl is set to Manual.
The value must be greater than or equal to the window length value. Any amount
greater than the window length is implemented by zero padding. This is an
advanced control that normally does not need to be changed.
The “points” is the number of points for IQ pairs. For example, if Window Length is
set to 10, it means the window length is for 10 I and 10 Q points, not 5 I and 5 Q
points.
Remote Command Complex Spectrum:
[:SENSe]:SPECtrum:FFT:LENGth <integer>
[:SENSe]:SPECtrum:FFT:LENGth?
Streaming:
[:SENSe]:STReaming:FFT:LENGth <integer>
[:SENSe]:STReaming:FFT:LENGth?
Example
:SPEC:FFT:LENG 566
:SPEC:FFT:LENG?
Dependencies Grayed-out when Length Ctrl is set to Auto
Preset 2048
IQ Analyzer Mode User's &Programmer's Reference 242
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