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3 - 46 USING THE COMBISCOPE INSTRUMENTS
3.9.1.2 Specify the settings of the post processing function.
When desired, specify the settings of the post processing function to be used. The
following settings can be programmed:
- the filter type of the FFT function RECTanguler | HAMMing | HANNing
- the width of the low-pass filter window 3, 5, 7, .., 39, 41 points
- the width of the differential window 3, 5, 7, .., 127, 129 points
Example:
Send
→ CALCulate2:TRANsform:FREQuency:WINDow HAMMing
’Defines the Hamming filter for the FFT process.
3.9.1.3 Enable the post processing function.
Enable the desired post processing function by using the :STATe command of the
calculate function concerned. The following post processing functions are
available:
STANDARD AVAILABLE:
- mathematical calculations :MATH
- frequency filtering :FILTer:FREQuency
- frequency domain transformations (FFT) :TRANsform:FREQuency
OPTIONAL:
- histogram transformation :TRANsform:HISTogram
- integrating traces :INTegral
- differentiating traces :DERivative (alias :DIFFerential)
Example:
Send
→ CALCulate2:TRANsform:FREQuency:STATe ON ’Enables FFT
The post processing is automatically executed when a trace that is fed into the
CALCulate function is changed. If a mathematical function is switched on, the
other functions are automatically switched off.
SENSe
CH1
CH2
CH3
CH4
TRACe
M1_1
M1_2
M1_3
M1_4
M2_1
M2_2
M2_3
M2_4
M3_1
M3_2
M3_3
M3_4
M50_1
M50_2
M50_3
M50_4
CALCulate[1]
CALCulate2
ST7162
CALCulate
CALCulate:FEED"M3_2"
CALCulate2:FEED"M2_4"
Figure 3.18 Post processing feed definition