SWEep Subsystem Introduction

To generate a frequency sweep:

1. Select the waveform shape, amplitude and offset: Use APPLy or the equivalent FUNCtion, FREQuency, VOLTage, and VOLTage:OFFSet commands to select the function, frequency, amplitude, and offset. You can select a sine, square, ramp, pulse, or arbitrary waveform (noise, PRBS, and DC are not allowed).
2. Select sweep's frequency boundaries: FREQuency:STARt and FREQuency:STOP , or FREQuency:CENTer and FREQuency:SPAN
3. Select linear or logarithmic sweep mode: SWEep:SPACing
4. Set sweep time: SWEep:TIME
5. Set sweep hold and return times: SWEep:HTIMe and SWEep:RTIMe
6. Select sweep trigger source: TRIGger[1|2]:SOURce
7. Set the marker frequency (optional): MARKer:FREQuency
8. Enable sweep: SWEep:STATe ON

The following code produces the waveform shown below.

SOURce1:FUNCtion SINE
SOURce1:FREQuency +2.0E+03
SOURce1:FREQuency:STARt +2.0E+03
SOURce1:FREQuency:STOP +6.0E+03
SOURce1:VOLTage +1.0
SOURce1:VOLTage:OFFS +0.0
SOURce1:SWEep:TIME +5.0E-03
TRIGger1:SOURce IMM
SOURce1:FREQuency:MODE SWE
OUTPut1 1

[SOURce[1|2]:]SWEep:HTIMe {<hold_time>|MINimum|MAXimum|DEFault}
[SOURce[1|2]:]SWEep:HTIMe? [{MINimum|MAXimum}]

Sets number of seconds the sweep holds (pauses) at the stop frequency before returning to the start frequency.

Parameter	Typical Return
0 to 3600, default 0	+3.400000000000000E+00
Set sweep hold time to 3.4 seconds: SWE:HTIM 3.4

[SOURce[1|2]:]SWEep:RTIMe {<return_time>|MINimum|MAXimum|DEFault}
[SOURce[1|2]:]SWEep:RTIMe? [{MINimum|MAXimum}]

Sets number of seconds the sweep takes to return from stop frequency to start frequency.

Parameter	Typical Return
0 to 3600, default 0	+5.600000000000000E+00
Set sweep return time to 5.6 s: SWE:RTIM 5.6

• The return sweep is always a linear sweep, regardless of the setting of SWEep:SPACing.

[SOURce[1|2]:]SWEep:SPACing {LINear|LOGarithmic}
[SOURce[1|2]:]SWEep:SPACing?

Selects linear or logarithmic spacing for sweep.

Parameter	Typical Return
{LINear|LOGarithmic}, default LIN	LIN or LOG
Set logarithmic sweep spacing: SWE:SPAC LIN

• LINear: output frequency varies linearly (from start frequency to stop frequency) during sweep.
• LOGarithmic: output frequency varies logarithmically (from start frequency to stop frequency) during sweep.

[SOURce[1|2]:]SWEep:STATe {ON|1|OFF|0}
[SOURce[1|2]:]SWEep:STATe?

Enables or disables the sweep.

Parameter	Typical Return
{ON|1|OFF|0}, default OFF	0 (OFF) or 1 (ON)
Enable sweep: SWE:STAT ON

[SOURce[1|2]:]SWEep:TIME {<seconds>|MINimum|MAXimum|DEFault}
[SOURce[1|2]:]SWEep:TIME? [{MINimum|MAXimum}]

Sets time (seconds) to sweep from start frequency to stop frequency.

Parameter	Typical Return
1 ms to 250,000 s for linear sweep, up to 500 s for logarithmic sweep; default 1 s	+2.500000000000000E+01
Set sweep time to 25 s: SWE:TIME 25

• The number of discrete frequency points in the sweep is calculated based on the sweep time.