:FUNCtion:PARameters:DEPort:RESolution

Command Syntax

:FUNCtionN:PARameters:DEPort:RESolution <min_freq_resolution>

<min_freq_resolution> is a double.

Where N identifies one of up to 64 possible operators {1:64} that can be defined as part of a math function. The operators are numbered in the order that they were originally added to the function.

Query Syntax

:FUNCtionN:PARameters:DEPort:RESolution?

Description

Specifies the filter size of a 4-Port, 1-Source DeEmbedding operator (:FUNCtion:FOPerator) by specifying its minimum frequency resolution (in Hertz).

The correction transfer function is applied by means of a FIR digital filter. The size of this filter determines the time span of the transformation it can apply. However, there is a trade-off. Using a longer filter corrects longer time constants, but it can take longer to calculate. By default, Infiniium tries to choose a filter size that preserves the coarsest frequency resolution used by all of the model blocks. However, you can limit the filter size by increasing the minimum frequency resolution.

Increasing the minimum frequency resolution makes the frequency resolution less fine and automatically decreases the maximum time span (:FUNCtion:PARameters:DEPort:SPAN) (which corresponds to a higher update rate). Therefore, you would do this if you wanted a higher update rate with the trade-off of a shorter transfer function impulse response.

The minimum frequency resolution control is the reciprocal of the maximum time span control (:FUNCtion:PARameters:DEPort:SPAN), and these controls are tied together, so as you set one to a lower value, the other one raises to a higher value and vice versa.