VXI VT1538A user manual SOURceFUNCtionSHAPeSQUare, SOURceFUNCtionSTEPper, Parameters

PULM state is enabled then the pulse width modulated mode is active. If both the FM and the PULM states are disabled then the PULSe channel is in the single pulse mode.

•Send with VXIplug&play Function: hpe14XX_cmd(...)

SOURce:FUNCtion[:SHAPe]:SQUare

SOURce:FUNCtion[:SHAPe]:SQUare (@<ch_list>) sets the SOURce function to output a square wave (50% duty cycle) on the channels in <ch_list>.

Parameters

Parameter	Parameter	Range of	Default
Name	Type	Values	Units
ch_list	string	100 - 163	none

Comments • Send with VXIplug&play Function: hpe14XX_cmd(...)

Usage The frequency control for these channels is provided by the algorithm language function:.

O143 = 2000 /* set channel 43 to 2KHz */

SOURce:FUNCtion:STEPper

SOURce:FUNCtion:STEPper <preset_pos>,<mode>,<max_vel>,<min

_vel>,(@<ch_list>) controls stepper motors. The E1538 can operate 2 or 4 phase motors in full, and half step mode. Position values are sent from the algorithm to the first channel of a 2 or 4 channel "motor group". The algorithm reads the current position from the second channel of the group.

See “Stepper Motor Control” on page 37.

Parameters

Parameter	Parameter	Range of	Default
Name	Type	Values	Units
preset_pos	discrete (string)	see text	none
mode		see text	none
max_vel			none
min_vel			none
ch_list	string	100 - 163	none

Comments • <preset_pos> defines the position count at algorithm start-up. This is an unsigned 16-bit integer and can range from 0 to 65,535 for full speed modes ("SF"), or 0 to 32,767 for half speed modes ("SH").

Agilent E1538A Enhanced Frequency/Totalize/PWM SCP 67