Tektronix AFG2021 Programmer's Manual page 90

Command Descriptions
Returns
Examples
[SOURce[1]]:SWEep:SPACing
Group
Syntax
Arguments
Returns
Examples
[SOURce[1]]:SWEep:TIME
Group
2-72
<NRf> is the return time in seconds.
<units>::=[ns | μs | ms | s]
<seconds>
SOURce1:SWEep:RTIMe 1ms
sets the CH 1 return time to 1 ms.
The [SOURce[1]]:SWEep:SPACing command selects linear or logarithmic
spacing for the sweep for the specified channel.
The query command returns the type for the sweep spacing for the specified
channel.
Source
[SOURce[1]]:SWEep:SPACing
[SOURce[1]]:SWEep:SPACing?
LINear sets the sweep spacing to linear.
LOGarithmic sets the sweep spacing to logarithmic.
LIN|LOG
SOURce1:SWEep:SPACing LINear
sets the CH1 sweep spacing to linear.
This command sets or queries the sweep time for the sweep for the specified
channel. The sweep time does not include hold time and return time. The setting
range is 1 ms to 300 s.
Source
AFG2021 Arbitrary Function Generator Programmer Manual
{LINear|LOGarithmic}