[SENSe<Ch>:]SWEep...    Related Topics

This subsystem provides general settings to control the sweep. Most of the settings have an impact on the sweep time.

 

Command tree: [SENSe<Ch>:]SWEep

:AXIS

:FREQuency

:POWer

:COUNt

:DWELl

:POINts

:SPACing

:SRCPort

:STEP

:TIME

:AUTO

:TYPE

The [SENSe<Ch>:]SWEep... settings apply to non-segmented sweep types. Segmented sweeps are selected via [SENSe<Ch>:]SWEep:TPYE SEGMent and configured in the [SENSe<Ch>:]SEGMent<Seg>... subsystem.     

[SENSe<Ch>:]SWEep:AXIS:FREQuency '<frequency_ref>'

Selects the stimulus signal that is used for the definition of the frequency sweep range or CW frequency.

For R&S ZVB analyzers, all frequencies are coupled so that this selection has no effect.

<Ch>

Channel number. If unspecified the numeric suffix is set to 1.

 

'<frequency_ref>'

String parameter, one of the following signals:
'Channel Base; Source' – Base channel frequency
'Port 1; Source' – Source frequency at port 1,
'Port 2; Source' – Source frequency at port 2
...
'Port All; Receiver' – Receiver frequency (equal for all analyzer ports)
'Gen 1; Source' – External generator frequency 1
...
'Pmtr 1; Receiver' – External power meter frequency 1
...

*RST value

'Channel Base: Source'

 

SCPI, Command Types

Device-specific, command or query

 

 

 

 

[SENSe<Ch>:]SWEep:AXIS:POWer '<power_ref>'

Selects the stimulus signal that is used for the definition of the power sweep range or fixed power.

For R&S ZVB analyzers, all powers are coupled so that this selection has no effect.

<Ch>

Channel number.  

 

'<frequency_ref>'

String parameter, one of the following signals:
'Channel Base; Source' – Base channel power
'Port 1; Source' – Source power at port 1,
'Port 2; Source' – Source power at port 2
...
'Gen 1; Source' – External generator power 1
...

*RST value

'Channel Base; Source'

 

SCPI, Command Types

Device-specific, command or query

 

 

 

 

[SENSe<Ch>:]SWEep:COUNt <No_of_Sweeps>

Defines the number of sweeps to be measured in single sweep mode (INITiate<Ch>:CONTinuous OFF).

<Ch>

Channel number. If the single sweep mode settings apply to all channels (INITiate<Ch>[:IMMediate]:SCOPe ALL), this suffix is ignored; see program example in section Single Sweep Mode.

 

<No_of_Sweeps>

Number of consecutive sweeps to be measured.

Range [def. unit]

1 to 999. [–]

*RST value

1

 

SCPI, Command Types

Confirmed, command or query

 

Example:

See CALCulate<Chn>:DATA:NSWeep:FIRSt?.

 

 

[SENSe<Ch>:]SWEep:DWELl <delay>

Defines the Meas. Delay time for each partial measurement. Setting a delay disables the automatic calculation of the (minimum) sweep time; see [SENSe<Ch>:]SWEep:TIME:AUTO.

<Ch>

Channel number.  

 

<delay>

Meas. delay before each partial measurement.

Range [def. unit]

0 s to 3.179551E+002 s. [s] Changing the delay leaves the number of points unchanged but has an impact on the duration of the sweep ([SENSe<Ch>:]SWEep:TIME).  

*RST value

0 s

 

SCPI, Command Types

Confirmed, command or query

 

Example:

FUNC "XFR:POW:S12"

Activate a frequency sweep and select the S-parameter S12 as measured parameter for channel and trace no. 1.

SWE:TIME?

Query total sweep time.

SWE:DWEL 1

Set a delay of 1 s for each partial measurement.

SWE:TIME?

Query total sweep time. The time is extended by the delay times the total number of partial measurements per sweep.

 

 

[SENSe<Ch>:]SWEep:POINts <no_points>

Defines the total number of measurement points per sweep (Number of Points).

<Ch>

Channel number 1.

 

<no_points>

Number of points per sweep.

Range [def. unit]

1 to 60001. [–]

*RST value

201

 

SCPI, Command Types

Confirmed, command or query

 

Example:

FUNC "XFR:POW:S12"

Activate a frequency sweep and select the S-parameter S12 as measured parameter for channel and trace no. 1.

SWE:TIME?

Query total sweep time.

SWE:POIN 2010

Multiply the (default) number of points by 10.

SWE:TIME?

Query total sweep time again. The analyzer estimates a sweep time that is also multiplied by 10.

 

 

[SENSe<Ch>:]SWEep:SPACing  LINear | LOGarithmic

Defines the frequency vs. time characteristics of a frequency sweep (Lin. Frequency or Log Frequency). The command has no effect on segmented frequency, power or time sweeps.

Note: Use [SENSe<Ch>:]SWEep:TPYE to select sweep types other than Lin. Frequency or Log. Frequency.

<Ch>

Channel number.

 

LINear

The stimulus frequency is swept in equidistant steps over the frequency range. In a Cartesian diagram, the x-axis is a linear frequency axis.

LOGarithmic

The frequency is swept in equidistant steps on a logarithmic scale. In a Cartesian diagram, the x-axis is a logarithmic frequency axis.

*RST value

LINear

 

SCPI, Command Types

Confirmed, command or query

 

Example:

FUNC "XFR:POW:S12"

Activate a frequency sweep and select the S-parameter S12 as measured parameter for channel and trace no. 1.

SWE:SPAC LOG

Change to sweep type Log Frequency.

 

 

[SENSe<Chn>:]SWEep:SRCPort 1 | 2 | 3 | 4

Selects a source port for the stimulus signal (Drive Port). The setting acts on the active trace. The effect of the drive port selection depends on the measurement parameter associated to the active trace:

<Chn>

Channel number used to identify the active trace. If unspecified the numeric suffix is set to 1.

 

1 ...

Test port number of the analyzer, 1 to 2, 3 or 4, depending on the analyzer model.

*RST value

1 (test port 1)

 

SCPI, Command Types

Device-specific, with query.

 

Example:

CALC4:PAR:SDEF "Ch4Tr1", "A1"

Create channel 4 and a trace named Ch4Tr1 to measure the wave quantity a1. The trace automatically becomes the active trace.

SENS4:SWE:SRCP 2

Select drive port 2 for the active trace.

 

 

[SENSe<Ch>:]SWEep:STEP <step_size>

Sets the distance between two consecutive sweep points.

This setting is valid for sweep types with equidistant sweep points only. It does not apply to logarithmic and segmented sweeps.

<Ch>

Channel number.

 

<step_size>

Stimulus step size.

Range [def. unit]

Depending on the other channel settings. The minimum step size is equal to the sweep span divided by the maximum number of points minus one ([SENSe<Ch>:]SWEep:POINts), the maximum step size is equal to the sweep span ([SENSe<Ch>:]FREQuency:SPAN). See also description of manual control and program example below. [–]

*RST value

Depending on the analyzer model. The default step size is equal to the default sweep span of the analyzer divided by the default number of points minus one.

 

SCPI, Command Types

Confirmed, with query.

 

Example:

*RST; :SWE:STEP?

Query the default step size. For a 24 GHz analyzer, the response is 119950000. 119950000 Hz = (24 GHz – 10 MHz) / 200.

SWE:STEP UP

Increase the step size.

FREQ:STOP?; :SWE:POIN?

Query the stop frequency of the sweep and the number of points. Increasing the step size has changed both values.

 

 

[SENSe<Ch>:]SWEep:TIME <duration>

Sets the duration of the sweep (Sweep Time). Setting a duration disables the automatic calculation of the (minimum) sweep time; see [SENSe<Ch>:]SWEep:TIME:AUTO.

Note: The sweep duration is ignored for the sweep types Time and CW Mode.     

<Ch>

Channel number.

 

<duration>

Duration of the sweep.

Range [def. unit]

The minimum duration depends on the other channel settings, in particular on the number of points ([SENSe<Ch>:]SWEep:POINts), the IF bandwidth (BWID) and the Meas. Delay for each partial measurement ([SENSe<Ch>:]SWEep:DWELl). The maximum is 100000 s. [s] Changing the duration leaves the number of points unchanged but directly affects the delay.

*RST value

MIN, depending on the channel settings

 

SCPI, Command Types

Confirmed, command or query

 

Example:

SWE:TIME 1

Set a total sweep time of 1 s.

SWE:DWEL?

Query the delay for each partial measurement.

SWE:TIME 2

Increase the total sweep time to 2 s.

SWE:DWEL?

Query the meas. delay for each partial measurement again. The delay is increased by 1 s divided by the total number of partial measurements per sweep.

 

 

[SENSe<Ch>:]SWEep:TIME:AUTO <Boolean>

When enabled, the (minimum) sweep duration is calculated internally using the other channel settings and zero delay ([SENSe<Ch>:]SWEep:DWELl).

Note: The automatically calculated sweep duration is ignored for the sweep types Time and CW Mode.   

<Ch>

Channel number.

 

<Boolean>

ON | OFF - Turns the automatic calculation of the sweep time on or off. OFF is also set if the sweep duration or delay is set explicitly using [SENSe<Ch>:]SWEep:TIME or [SENSe<Ch>:]SWEep:DWELl.  

*RST value

ON

 

SCPI, Command Types

Confirmed, command or query

 

Example:

SWE:TIME 1

Set a total sweep time of 1 s.

SWE:TIME:AUTO?

A query returns the value 1.

 

 

[SENSe<Ch>:]SWEep:TYPE
LINear | LOGarithmic | SEGMent | POWer | CW | POINt

Selects the sweep type, i.e. the sweep variable (frequency/power/time) and the position of the sweep points across the sweep range.

<Ch>

Channel number.

 

LINear

Lin. frequency sweep at constant source power (SOURce<Ch>:POWer<Pt>[:LEVel][:IMMediate][:AMPlitude]). The stimulus frequency ([SENSe<Ch>:]FREQuency:...) is swept in equidistant steps over the frequency range. In a Cartesian diagram, the x-axis is a linear frequency axis.

LOGarithmic

Log. frequency sweep. The frequency is swept in equidistant steps on a logarithmic scale. In a Cartesian diagram, the x-axis is a logarithmic frequency axis.

SEGMent

Segmented frequency sweep. The sweep range is composed of several continuous frequency ranges or single frequency points defined by means of the commands in the [SENSe<Ch>:]SEGMent<Seg>... subsystem.  

POWer

Power sweep. The measurement is performed at constant frequency (SOURce<Ch>:FREQuency<Pt>:CW|FIXed) but with variable generator power that is swept in linear, equidistant steps over a continuous range (SOURce<Ch>:POWer<Pt>:STARt, SOURce<Ch>:POWer<Pt>:STOP). In a Cartesian diagram, the x-axis is a dB-linear power axis.   

CW

Time sweep. The measurement is performed at constant frequency (SOURce<Ch>:FREQuency<Pt>:CW|FIXed) and source power (SOURce<Ch>:POWer<Pt>[:LEVel][:IMMediate][:AMPlitude]) and repeated over a specified period of time at constant time intervals.   

POINt

CW Mode sweep, time sweep triggered according to the current trigger settings.

 

 

 

 

 

 

*RST value

LINear

 

SCPI, Command Types

Device-specific, command or query

 

Example:

FUNC "XFR:POW:S12"

Activate a frequency sweep and select the S-parameter S12 as measured parameter for channel and trace no. 1.

SWE:TYPE LOG

Change to sweep type Log Frequency.