For any of the Filter "Stage" parameters to take effect, SENS:IF:FILT:AUTO must be set to OFF (MANUAL) and mode, and SENS:IF:FILT:CMOD must be set to OFF.
Stage2 settings are ignored when using DSP 5 versions.
Programs that control these settings, or state files that are saved, will yield different results when run or recalled on VNAs with DSP 4 versions versus DSP 5 versions. Learn more about DSP versions.
Critical Note: These commands act on the selected measurement. You can select one measurement for each channel using Calc:Par:Select

SENSe<cnum>:IF:BANDwidth:FILTer <enum>

Applicable Models: N522xB and N524xB (Read-Write) Sets and returns the IF bandwidth filter shape. Learn more. Critical Note
Parameters
<cnum>	Existing channel number. If unspecified, <cnum> is set to 1.
<enum>	(String) Filter shape. Chose from: STANdard - Legacy filter. This filter is the fastest, but has side lobes that rise to ~-32 dBc. GAUSsian - The Gaussian filter takes longer to acquire a point but has no side lobes.
Examples	SENS:IF:BAND:FILT GAUS sense2:if:bandwidth:filter standard
Query Syntax	SENSe<cnum>:IF:BANDwidth:FILTer?
Return Type	String
Default	STANdard

SENSe<cnum>:IF:FILTer:AUTO <bool>

Applicable Models: N522xB and N524xB (Read-Write) Sets and returns whether the VNA configures the 3-stage digital filter settings or they will be configured manually. When making manual settings, also send SENS:IF:FILT:CMOD OFF which routes the IF through the 3-stage filter. Critical Note
Parameters
<cnum>	Existing channel number. If unspecified, <cnum> is set to 1.
<bool>	(Boolean) ON (or 1) - Automatic: VNA controls digital filter settings. OFF (or 0) - Manual: You control digital filter settings using other Sens:IF commands.
Examples	SENS:IF:FILT:AUTO 1 sense2:if:filter:auto 0
Query Syntax	SENSe<cnum>:IF:FILTer:AUTO?
Return Type	Boolean
Default	ON

SENSe:IF:FILTer:CMODe <bool>

Applicable Models: N522xB and N524xB (Read-Write) Sets and returns the ADC capture mode modeled as a 2-pole switch in the above diagram. The switch either bypasses or routes the IF through the 3-stage digital filter. Critical Note
Parameters
<bool>	(Boolean) ON (or 1) - The digital filters are bypassed and the raw ADC readings are taken directly. With DSP 4 versions, a maximum of 4096 data points per sweep can be acquired. With DSP 5 versions, the VNA maximum data points per sweep can be acquired. Learn more about DSP Versions. OFF (or 0) - The digital filters are used to process IF information. The filters can be configured automatically or manually using SENS:IF:FILT:AUTO.
Examples	SENS:IF:FILT:CMOD 1 sense2:if:filter:cmode 0
Query Syntax	SENSe<cnum>:IF:FILTer:CMODe?
Return Type	Boolean
Default	OFF

SENSe<cnum>:IF:FILTer:ERRors?

Applicable Models: N522xB and N524xB (Read-only) Returns the error string associated with the digital filters. The return string has three fields separated by commas: "stage1 status, stage2 status, stage3 status" Each of these fields can contain one or more of the following error codes: NO ERROR NUMBER-OF-COEFFICIENTS - the number of coefficients is excessive for that filter-stage COEFFICIENT VALUE - one or more coefficients are out of range for that filter-stage SUM-OF-COEFFICIENTS - the sum of all coefficients is excessive for that filter-stage, FREQUENCY - the frequency for Stage 1 is out of range (only applies stage1 field), *PARAMETER - one or more parameters are out of range (only applies to stage 3 field) Critical Note
Parameters
<cnum>	Existing channel number. If unspecified, <cnum> is set to 1.
Examples	SENS:IF:FILT:ERR? 'example return strings" NO ERROR, NO ERROR, NO ERROR indicates no errors, SUM-OF-COEFFICIENTS, NO ERROR, NO ERROR indicates that the sum of all filter coefficients exceed the maximum value for the Stage-1 filter, COEFFICIENT SUM-OF-COEFFICIENTS, NO ERROR, PARAMETER indicates a problems with Stage 1 coefficients and a problem with one or more of the parameters associated with the Stage 3 filter.
Return Type	String
Default	Not Applicable

SENSe<cnum>:IF:FILTer:STAGe<n>:COEFficients <coef>

Applicable Models: N522xB and N524xB (Read-Write) Sets and returns the digital filter coefficients of the specified stage. Note: Stage2 settings are ignored when using DSP Version 5. Learn more. Critical Note
Parameters
<cnum>	Existing channel number. If unspecified, <cnum> is set to 1.
<n>	Stage number. Choose 1, 2, or 3.
<coef>	Filter coefficients. For stages 1 and 2, values can be sent as integers or in floating point format. If floating point, the values are truncated to integers. The valid range is 0 to 131071. For stage 3: An array of floating point values. The valid range is any value within range of a floating point.
Examples	SENS:IF:FILT:STAG2:COEF 0,0.1,0.7,0.7,0.1 sense2:if:filter:stage3:coefficients +0.0E+000,+6.4E+001,+2.56E+002
Query Syntax	SENSe<cnum>:IF:FILTer:STAGe<n>:COEFficients?
Example	SENS:IF:FILT:STAG2:COEF?
Return Type	Floating point values
Default	Stage dependent

SENSe<cnum>:IF:FILTer:STAGe<n>:COUNt? [char]

Applicable Models: N522xB and N524xB (Read-only) Returns the number of taps in the digital filter of the specified stage. The filter sample count setting is only used when SENSe:IF:FILTer:AUTO is set to False (MANUAL). Note: Stage2 settings are ignored when using DSP Version 5. Learn more. Critical Note
Parameters
<cnum>	Existing channel number. If unspecified, <cnum> is set to 1.
<n>	Stage number. Choose 1, 2, or 3
[char]	Optional parameter. Choose from: MIN - returns the minimum number of coefficients for the specified stage. Stage1: 10, Stage2: 1, Stage3: 2 MAX - returns the maximum number of coefficients for the specified stage. Stage1 & 2: 1024, Stage3: 102400
Examples	SENS:IF:FILT:STAG2:COUN? sense2:if:filter:stage1:count? max
Return Type	Numeric
Default	Stage dependent

SENSe<cnum>:IF:FILTer:STAGe1:FREQuency <value>

Applicable Models: N522xB and N524xB (Read-Write) Sets and returns the Numerically Controlled Oscillator (NCO) frequency. This command is only used when SENSe:IF:FILTer:AUTO is set to False (Manual). Critical Note
Parameters
<cnum>	Existing channel number. If unspecified, <cnum> is set to 1.
<value>	Stage 1 Frequency. Min value= 0 Hz With DSP 4 versions, Max value= 15 MHz. With DSP 5 versions, Max value = 38 MHz. Or programmatically use the Max and Min queries to determine the range of settable values. Learn more about DSP versions.
Examples	SENS:IF:FILT:STAGe1:FREQ 9e6 sense2:if:filter:stage1:frequency 9.2e6
Query Syntax	SENSe<cnum>:IF:FILTer:STAGe1:FREQuency? 'returns the current parameter value SENSe<cnum>:IF:FILTer:STAGe1:FREQuency? Min 'returns the minimum frequency value. SENSe<cnum>:IF:FILTer:STAGe1:FREQuency? Max 'returns the maximum frequency value.
Return Type	Numeric
Default	Nominal IF Frequency. Learn more

SENSe<cnum>:IF:FILTer:STAGe3:CATalog?

Applicable Models: N522xB and N524xB (Read-only) Returns a list of strings for the currently supported filter types that can be used for the stage 3 filter. This command is only used when SENSe:IF:FILTer:AUTO is set to False (Manual). See SENS:IF:FILT:STAGe3:TYPE for a list of currently supported filter types. Critical Note
Parameters
<cnum>	Existing channel number. If unspecified, <cnum> is set to 1.
Examples	SENS:IF:FILT:STAGe3:CAT? sense2:if:filter:stage3:catalog?
Return Type	String array
Default	Not Applicable

SENSe<cnum>:IF:FILTer:STAGe3:PARameter <p>, <value>

Applicable Models: N522xB and N524xB (Read-Write) Sets and returns the Stage 3 filter parameters. Must first select the filter type (SENS:IF:FILT:STAGe3:TYPE) before setting these parameters Use SENSe:IF:FILT:STAGe3:PCAT? to return a list of the available parameters for the currently selected filter type. Critical Note
Parameters
<cnum>	Existing channel number. If unspecified, <cnum> is set to 1.
<p>	(String) Filter parameter. Case Sensitive. Choose from: "C" - Tap count (Tukey, RECT, PWIN) "P" - Period (PWIN ONLY) "D" - Delay (PWIN ONLY) "W" - Width (PWIN ONLY) "R" - Ramp Count (PWIN ONLY) "M" - Number of times to repeat the user-supplied array for each data point (COEF ONLY)
<value>	(Numeric) Parameter Value for the specified stage 3 parameter. Use the query form to return the minimum and maximum values for the specified parameter.
Examples	SENS:IF:FILT:STAGe3:PAR "C",64 sense2:if:filter:stage3:parameter "d",0.5E-6
Query Syntax	SENSe<cnum>:IF:FILTer:STAGe3:PARameter? <p> returns the current parameter value SENSe<cnum>:IF:FILTer:STAGe3:PARameter? <p>,Min returns the minimum parameter value. SENSe<cnum>:IF:FILTer:STAGe3:PARameter? <p>,Max returns the maximum parameter value.
Examples	SENS:IF:FILT:STAGe3:PAR? "C" sense2:if:filter:stage3:parameter? "d",min
Return Type	Numeric
Default	RECT: C = 1 PWIN: C=1E6, P=10ms, D=50us, W=50us, R=7 TUKEY: C=1 COEF: M=1

SENSe<cnum>:IF:FILTer:STAGe3:PCATalog?

Applicable Models: N522xB and N524xB (Read-only) Returns a list of the available parameters for the currently selected filter type. Critical Note
Parameters
<cnum>	Existing channel number. If unspecified, <cnum> is set to 1.
Examples	SENS:IF:FILT:STAGe3:PCAT? sense2:if:filter:stage3:pcatalog?
Return Type	String
Default	Not Applicable

SENSe<cnum>:IF:FILTer:STAGe3:TYPE <value>

Applicable Models: N522xB and N524xB (Read-Write) Sets and returns the Stage 3 filter type. This command is only used when SENSe:IF:FILTer:AUTO is set to False (Manual). Critical Note
Parameters
<cnum>	Existing channel number. If unspecified, <cnum> is set to 1.
<value>	(String) Filter type. Chose from: "RECT" Rectangular Window Filter "TUKEY" Tukey Filter "PWIN" Pulse Window Filter "COEF" User-supplied array
Examples	SENS:IF:FILT:STAGe3:TYPE RECT sense2:if:filter:stage3:type pwin
Query Syntax	SENSe<cnum>:IF:FILTer:STAGe3:TYPE?
Return Type	String
Default	"TUKEY"

SENSe<cnum>:IF:FREQuency:AUTO <bool>

Applicable Models: N522xB and N524xB (Read-Write) Sets and returns the method for specifying the way the IF Frequency is determined. Critical Note
Parameters
<cnum>	Existing channel number. If unspecified, <cnum> is set to 1.
<bool>	(Boolean) ON (or 1) - Automatic. VNA determines the setting for the IF frequency. The IF frequency is based on many VNA settings, including measurement frequency. Therefore, it is NOT possible to read the IF frequency that is being used. OFF (or 0) - Manual. Use SENS:IF:FREQ to set the frequency.
Examples	SENS:IF:FREQ:AUTO 1 sense2:if:frequency:auto 0
Query Syntax	SENSe<cnum>:IF:FREQuency:AUTO?
Return Type	Boolean
Default	ON

SENSe<cnum>:IF:FREQuency[:VALue] <value>

Applicable Models: N522xB and N524xB (Read-Write) Sets and returns the IF frequency for ALL receiver paths being used for the specified channel. To set this frequency, SENS:IF:FREQ:AUTO must be set to OFF (Manual). Also returns the maximum and minimum allowable frequency settings. Learn more. Critical Note
Parameters
<cnum>	Existing channel number. If unspecified, <cnum> is set to 1.
<value>	(Numeric) Frequency value. Use the Max and Min Queries to determine the range of this setting. (SENS:IF:FREQ? Max)
Examples	SENS:IF:FREQ 9.1e6 sense2:if:frequency:value 8.9e6
Query Syntax	SENSe<cnum>:IF:FREQuency? 'returns the current frequency setting SENSe<cnum>:IF:FREQuency? Max 'returns the maximum allowable frequency setting SENSe<cnum>:IF:FREQuency? Min 'returns the minimum allowable frequency setting
Return Type	Numeric
Default	9 MHz