Tektronix AFG2021 Programmer's Manual page 84

Command Descriptions
[SOURce[1]]:PWM:INTernal:FREQuency
Group
Syntax
Related Commands
Arguments
Returns
Examples
[SOURce[1]]:PWM:INTernal:FUNCtion
Group
2-66
This command sets or queries the internal modulation frequency of PWM
modulation for the specified channel. You can use this command only when the
internal modulation source is selected.
You can set the internal modulation frequency from 2 mHz to 50.00 kHz with
resolution of 1 mHz.
You can select the source of modulating signal by using the
[SOURce[1]]:PWM:SOURce [INTernal|EXTernal] command.
Source
[SOURce[1]]:PWM:INTernal:FREQuency
{<frequency>|MINimum|MAXimum}
[SOURce[1]]:PWM:INTernal:FREQuency
[SOURce[1]]:PWM:SOURce
<frequency>::=<NRf>[<units>]
where <NRf> is the modulation frequency.
<units>::=[Hz | kHz | MHz]
<frequency>
SOURce1:PWM:INTernal:FREQuency 10kHz
sets the CH 1 internal frequency to 10 kHz.
This command sets or queries the modulating waveform of PWM modulation
for the specified channel. You can use this command only when the internal
modulation source is selected.
If you specify EFILe when there is no EFILe or the EFILe is not yet defined,
this command causes an error.
Source
AFG2021 Arbitrary Function Generator Programmer Manual
? {MINimum|MAXimum}