RIGOL
DS4000E Programming Guide
2-49
:CALCulate:FFT:VOFFset
Syntax
:CALCulate:FFT:VOFFset <offs>
:CALCulate:FFT:VOFFset?
Description
Sets or queries the horizontal position of the FFT operation waveform. The unit is related to the current
vertical scale type of FFT operation and the current amplitude unit of the source channel.
Parameter
Name
Type
Range
Default
<offs>
Real
(-40 x vertical scale of the FFT operation waveform) to (40 x
vertical scale of the FFT operation waveform)
60 dBV
Return Format
The query returns the vertical position in scientific notation.
:CALCulate:FFT:VSCale
Syntax
:CALCulate:FFT:VSCale <scale>
:CALCulate:FFT:VSCale?
Description
Sets or queries the vertical scale of the FFT operation waveform. The unit is related to the current vertical
scale type of FFT operation and the current amplitude unit of the source channel.
Parameter
Name
Type
Range
Default
<scale>
Real
Refer to Remarks
20 dBV/div
Remarks
The range of <scale> is related to the vertical scale type of FFT operation (refer to
the :CALCulate:FFT:VSMode command).
When the vertical scale type is "DB", the range of <scale> is from 1 dBV/div to 100 dBV/div, at 1-2-5
step.
When the vertical scale type is "VRMS", the default range of <scale> is from 0.01 V/div to 200 V/div.
Its actual range is related to the vertical scale of the source channel (refer to the :CHANnel<n>:SCALe
command), at 1-2-5 step.
Note: After the vertical scale of the source channel is modified, the range of <scale> will not be
changed until the FFT operation is re-enabled.
Return Format
The query returns the vertical scale in scientific notation.
:CALCulate:FFT:VSMode
Syntax
:CALCulate:FFT:VSMode <vmode>
:CALCulate:FFT:VSMode?
Description
Sets or queries the vertical scale type of FFT operation.
