#### CALCulate<Chn>:FILTer[:GATE]...

This subsystem defines the properties of the time gate optimize the time domain response (with option ZVAB-K2, Time Domain).

Command tree: CALCulate<Chn>:FILTer[:GATE]

:TIME

:CENTer

:DCHebyshev

:SHAPe

:SPAN

:STARt

:STATe

:STOP

[:TYPE]

:WINDow

##### CALCulate<Chn>:FILTer[:GATE]:TIME:CENTer <numeric_value>

Defines the center time of the time gate.

<Chn> | Channel number used to identify the active trace
<numeric_value> | Center time of the time gate
Range [def. unit] | -99.8999999 s to +99.8999999 s. The increment (parameters UP or DOWN) is 0.1 ns. [s]
*RST value | 1.5E-009 s
SCPI, Command Types | Confirmed, command or query
Example: | ``*`RST; CALC:TRAN:TIME:STAT ON; CALC:FILT:TIME:STAT ON` Reset the instrument and enable the time domain representation and the time gate. `CALC:FILT:TIME:CENT 0; SPAN 5ns` `S`et the center time to 0 ns and the time span to 5 ns.

##### CALCulate<Chn>:FILTer[:GATE]:TIME:DCHebyshev <numeric_value>

Sets the sideband suppression for the Dolph-Chebyshev time gate. The command is only available if a Dolph-Chebyshev time gate is active (CALCulate<Chn>:FILTer[:GATE]:TIME:WINDow DCHebyshev
).

<Chn> | Channel number used to identify the active trace
<numeric_value> | Sideband suppression
Range [def. unit] | 10 dB to 120 dB. The increment (parameters UP or DOWN) is 10 dB. [dB]
*RST value | 32 dB
SCPI, Command Types | Device-specific, command or query
Example: | `*RST; CALC:FILT:TIME:WIND DCH` Reset the instrument and select a Dolph-Chebyshev time gate for filtering the data in the frequency domain. `CALC:FILT:TIME:DCH 25` `S`et the sideband suppression to 25 dB.

##### CALCulate<Chn>:FILTer[:GATE]:TIME:SHAPe
MAXimum | WIDE | NORMal | MINimum

Selects the time gate to be applied to the time domain transform.

Use the generalized command CALCulate<Chn>:FILTer[:GATE]:TIME:WINDow
if you wish to select a Dolph-Chebychev time gate.

<Chn> | Channel number used to identify the active trace
Parameters | MINimum – Steepest edges (rectangle) WIDE – Normal gate (Hann) NORM – Steep edges (Hamming) Maximum – Maximum flatness (Bohman)
*RST value | WIDE
SCPI, Command Types | Device-specific, command or query
Example: | *RST; CALC:FILT:TIME:SHAP? Reset the instrument and query the type of time gate used. The response is WIDE.

##### CALCulate<Chn>:FILTer[:GATE]:TIME:SPAN <numeric_value>

Defines the span of the time gate.

<Chn> | Channel number used to identify the active trace
<numeric_value> | Span of the time gate.
Range [def. unit] | 2E-012 s to 200 s. The increment (parameters UP or DOWN) is 0.1 ns. [s]
*RST value | 5E-009 s
SCPI, Command Types | Confirmed, command or query
Example: | `See CALCulate<Chn>:FILTer[:GATE]:TIME:CENTer`

##### CALCulate<Chn>:FILTer[:GATE]:TIME:STARt <numeric_value>

Defines the start time of the time gate.

<Chn> | Channel number used to identify the active trace
<numeric_value> | Start time of the time gate.
Range [def. unit] | –100 s to +99.999999999998 s. The increment (parameters UP or DOWN) is 0.1 ns. [s]
*RST value | –1E-009 s
SCPI, Command Types | Confirmed, command or query
Example: | `*RST; CALC:TRAN:TIME:STAT ON; CALC:FILT:TIME:STAT ON` Reset the instrument and enable the time domain representation and the time gate. `CALC:FILT:TIME:STAR 0; STOP 10ns` `S`et the start time to 0 ns and the stop time to 10 ns.

Note: If the start frequency entered is greater than the current stop frequency (CALCulate<Chn>:FILTer[:GATE]:TIME:STOP
), the stop frequency is set to the start frequency plus the minimum frequency span (CALCulate<Chn>:FILTer[:GATE]:TIME:SPAN
).

##### CALCulate<Chn>:FILTer[:GATE]:TIME:STATe <Boolean>

Determines whether the time gate for trace no. <Chn> is enabled.

<Chn> | Channel number used to identify the active trace
<Boolean> | ON – Time gate enabled OFF – Time gate disabled
*RST value | OFF [–]
SCPI, Command Types | Confirmed, command or query
Example: | *RST; CALC:TRAN:TIME:STAT?; CALC:FILT:TIME:STAT? Reset the instrument, activating a frequency sweep, and query whether the default trace is displayed in the time domain and whether the time gate is enabled. The response is 0;0.

##### CALCulate<Chn>:FILTer[:GATE]:TIME:STOP <numeric_value>

Defines the stop time of the time gate.

<Chn> | Channel number used to identify the active trace
<numeric_value> | Stop time of the time gate.
Range [def. unit] | –99.999999999998 s to +100 s. The increment (parameters UP or DOWN) is 0.1 ns. [s]
*RST value | +4E-009 s
SCPI, Command Types | Confirmed, command or query
Example: | See CALCulate<Chn>:FILTer[:GATE]:TIME:STARt .

Note: If the stop frequency entered is smaller than the current start frequency (CALCulate<Chn>:FILTer[:GATE]:TIME:STARt
), the start frequency is set to the stop frequency minus the minimum frequency span (CALCulate<Chn>:FILTer[:GATE]:TIME:SPAN
).

##### CALCulate<Chn>:FILTer[:GATE]:TIME[:TYPE]
BPASs | NOTCh

Selects the time gate filter type, defining what occurs to the data in the specific time region.

<Chn> | Channel number used to identify the active trace
Parameters | BPASs – Band pass filter: pass all information in specified time region and reject all else NOTCh – Notch filter: reject all information in specified time region and pass all else.
*RST value | BPASs
SCPI, Command Types | Confirmed, command or query
Example: | `*RST; CALC:FILT:TIME:STAT ON` `Reset the instrument and enable the time gate.` `CALC:FILT:TIME NOTCh` Select a notch filter in order to reject unwanted pulses.

##### CALCulate<Chn>:FILTer[:GATE]:TIME:WINDow
RECT | HAMMing | HANN | BOHMan | DCHebyshev

Selects the time gate to be applied to the time domain transform.

<Chn> | Channel number used to identify the active trace
Parameters | RECT – Steepest edges (rectangle) HANN – Normal gate (Hann) HAMMing – Steep edges (Hamming) BOHMan – Minimum flatness (Bohman) DCHebyshev – Arbitrary gate shape (Dolph-Chebychev)
*RST value | HANN
SCPI, Command Types | Confirmed (with some device-specific parameters), command or query
Example: | `See` `CALCulate<Chn>:FILTer[:GATE]:TIME:DCHebychev`