VXI VT1422A, User Manual

Page: 378 / 529

376 VT1422A Command Reference Chapter 7
SOURce
•
The variable pulse-width control for this channel is provided by the algorithm
language. When the algorithm executes an assignment statement to this channel,
the value assigned will be the pulse-width setting. For example:
O140 = .0025 /* set channel 43 pulse-width to 2.5 ms */
•
Send with VXIplug&play Function: hpe1422_cmd(...)
Usage
SOUR:PULS:PER .005,(@140)
set PWM pulse train to 200 Hz on
channel 40
SOURce:PULSe:PERiod?
SOURce:PULSe:PERiod? (@<
channel
>)
returns the fixed pulse period value on
the pulse width modulated pulse channel in < channel >.
Parameters
Comments
•
If the channels specified are not on a Frequency/Totalize SCP, an error will
be generated.
•
Returned Value: numeric period. The type is float32 .
•
Send with VXIplug&play Function: hpe1422_cmdReal64_Q(...)
SOURce:PULSe:WIDTh
SOURce:PULSe:WIDTh <
pulse_width
>,(@<
ch_list
>)
sets the fixed pulse width
value on the frequency modulated pulse channels in < ch_list >.
Parameters
Comments
•
If the channels specified are not on a Frequency/Totalize SCP, an error will
be generated.
•
*RST Condition: SOUR:FM:STATE OFF and SOUR:PULM:STATE OFF
•
Related Commands: SOUR:PULM:STATE, SOUR:PULS:POLarity
Parameter
Name
Parameter
Type
Range of
Values
Default
Units
channel string 100 - 163 none
Parameter
Name
Parameter
Type
Range of
Values
Default
Units
pulse_width numeric (float32) 7.87E-6 to 7.8125E-3
(238.4E-9 resolution) seconds
ch_list string 100 - 163 none