# :FUNCtion:PARameters:DEPort:BLIMit

DeEmbed (4 port, 1 source) Parameters Commands

- :FUNCtion:PARameters:DEPort:ALIGn
- :FUNCtion:PARameters:DEPort:BANDwidth
- :FUNCtion:PARameters:DEPort:BLIMit
- :FUNCtion:PARameters:DEPort:BSPan?
- :FUNCtion:PARameters:DEPort:CFRequency
- :FUNCtion:PARameters:DEPort:DRESult
- :FUNCtion:PARameters:DEPort:FNAMe
- :FUNCtion:PARameters:DEPort:IMPulse
- :FUNCtion:PARameters:DEPort:MEASsim
- :FUNCtion:PARameters:DEPort:RCORr
- :FUNCtion:PARameters:DEPort:RESolution
- :FUNCtion:PARameters:DEPort:SPAN
- :FUNCtion:PARameters:DEPort:STEP

## Command Syntax

    :FUNCtionN:PARameters:DEPort:BLIMit {NONE | BRICkwall | BESSel | BUTTerworth | BANDpass}

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:BLIMit?

## Description

Specifies the type of bandwidth filter used for a 4-Port 1-Source DeEmbedding operator (`:FUNCtion:FOPerator`). Use the `:FUNCtion:PARameters:DEPort:BANDwidth` command to specify the function's bandwidth. Use the `:FUNCtion:PARameters:DEPort:BLIMit` command to select the type of bandwidth filter used. Use the `:FUNCtion:PARameters:DEPort:FNAMe` command to open an existing network file that models your test setup.

NONE
  No filter is applied.
BRICkwall
  Specifies a Brick-Wall response for the bandwidth limit filter. This response has a sharp roll-off.
BESSel
  Specifies a 4th order Bessel response for the bandwidth limit filter. This response has a more gradual roll-off.

  To achieve the 4th order Bessel response, the maximum bandwidth you can specify is about 2/3 of the maximum bandwidth you could specify with the Brick-Wall filter. Also with the Bessel filter, the brick-wall response takes over at what would be the brick-wall filter's maximum bandwidth. Therefore, you can have a combination of roll-off responses with this selection.

BUTTerworth
  Specifies a 4th order Butterworth response for the bandwidth limit filter. This response has a roll-off that is between the Brick Wall and Bessel responses.

  To achieve the 4th order Butterworth response, the maximum bandwidth you can specify is about 80% of the maximum bandwidth you could specify with the Brick-Wall filter. Also with the Butterworth filter, the brick-wall response takes over at what would be the brick-wall filter's maximum bandwidth. Therefore, you can have a combination of roll-off responses with this selection.

BANDpass
  This option is used with the Phase Noise analysis application. Because you do not have control over the slope of the transition from the pass band to the rejected bands, this option has limited usefulness as a general-purpose bandpass filter.

## Example Command Sequence

    :FUNCtion2:FOPerator DEPort
    :FUNCtion2:PARameters:DEPort:FNAMe "C:\Users<user_name>\Documents\Keysight\Infiniium\De-Embedding Networks\DUT_4.tf4"
    :FUNCtion2:PARameters:DEPort:BANDwidth 7.5E9
    :FUNCtion2:PARameters:DEPort:BLIMit BRICkwall
    :FUNCtion2:COLor TCOLor4
    :FUNCtion2:DISPlay ON
    *OPC?
    …  //  Your code to synchronize execution timing.