On LT3000 series, there is a limit to the maximum output frequency depending on the number of channels used.
31.5.14.2 Pulse Output Usage Restrictions
Sets up the pulse output frequency.
On LT3000 series, there is a limit to the maximum output frequency depending on the number of channels used. 31.5.14.2 Pulse Output Usage Restrictions
Set up with System Variables
Define the output frequency in the system variable (#L_PLS*_LHZ). The system variable name differs depending on the channel number mapped to pulse output.