CALCulate[1|2|3|4]:CFIT:ORDer:AUTO command/query
Determines the operation of the curve fitter.
Command Syntax: CALCulate[1|2|3|4]:CFIT:ORDer:AUTO OFF|0|ON|1
Example Statements: OUTPUT 711;"Calc:Cfit:Ord:Auto OFF"
OUTPUT 711;"CALCULATE3:CFIT:ORDER:AUTO OFF"
Query Syntax: CALCulate[1|2|3|4]:CFIT:ORDer:AUTO?
Return Format: Integer
Attribute Summary: Option: 1D3 Curve Fit/Synthesis
Synchronization Required: no
Preset State: ON (+1)
SCPI Compliance: instrument-specific
Description:
This command determines the curve fit operation mode. AUTO ON (the default value) places the curve
fitter in automatic order selection. AUTO OFF gives a model with fixed numerator and denominator
order.
In automatic order selection (CALC:CFIT:ORDER:AUTO is ON), the curve fit operation starts with 1
pole and 1 zero. If the fit is poor, the orders increment and another curve fit operation is performed. This
iterative process continues until a model is found which more closely matches the measured frequency
response. The curve fit operation uses the number of poles and zeros specified with the
CALC:CFIT:ORD:POLES and CALC:CFIT:ORD:ZER commands as the upper bounds for this iterative
search.
If CALC:CFIT:ORDER:AUTO OFF is sent, the curve fit operation provides a model with the number of
poles and zeros specified with the CALC:CFIT:ORD:POLES and CALC:CFIT:ORD:ZER commands.
There is no iterative search for a better model.
Note This command is not trace specific. It ignores the trace specifier.
CALCulate
6-14
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