# :FUNCtion:PARameters:BUTTerworth:IMPulse

Butterworth Parameters Commands

- :FUNCtion:PARameters:BUTTerworth:BANDwidth
- :FUNCtion:PARameters:BUTTerworth:IMPulse
- :FUNCtion:PARameters:BUTTerworth:ORDer
- :FUNCtion:PARameters:BUTTerworth:STEP
- :FUNCtion:PARameters:BUTTerworth:TFUNction

## Command Syntax

    :FUNCtionN:PARameters:BUTTerworth:IMPulse {ON | OFF | 1 | 0}

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

    :FUNCtion{1:64}:PARameters:BUTTerworth:IMPulse?

## Query Response

    {1 | 0}

## Description

For the Butterworth filter operator (`:FUNCtion:FOPerator`), this command turns on and off the Show Impulse Response option. When selected (on), the network is automatically loaded into the S-Parameter/Transfer Function Viewer and an impulse response chart is added.