GDS-1000B Programming Manual 
54 
:MATH:FFT:HORizontal:SCALe 
 
Sets or queries the zoom scale for FFT math.  
:MATH:FFT:HORizonatal:SCALe {<NRf> | ?} 
Zoom scale: 1 to 20 times  
:MATH:FFT:HORizontal:SCALe 5 
Sets the zoom scale to 5X. 
MATH:FFT:HORizontal:POSition 
 
Sets the horizontal position of the displayed FFT 
result.  
MATH:FFT:HORizontal:POSition { <NRf> | ? } 
Horizontal position: 0Hz ~ 999.9kHz 
Returns the vertical position. 
:MATH:FFT:HORizontal:POSition 6.0e5 
Sets the FFT horizontal position to 600kHz. 
 
Sets or queries the advanced math expression as a 
string.  
:MATH:DEFine {<string>| ?} 
An expression enclosed in double 
quotes. Note, ensure parentheses are 
used correctly in the expression. The 
expression can contain the following 
parts: