13: LPT library function reference Model 4200A-SCS Parameter Analyzer
13-162 4200A-901-01 Rev. C / February 2017
The maximum pulse width that can be set depends on the selected period for the pulse. For example,
if the period is set for 500 ns, the maximum pulse width that can be set for the fast speed is 490 ns
(500 ns − 10 ns = 490 ns).
The pulse width setting takes effect immediately during continuous pulse output. Otherwise, the width
setting takes effect when the next trigger is initiated. The pulse_trig command is used to trigger
continuous or burst output.
Example
pulse_width(VPU1, 1, 250e-9)
Sets the pulse width for channel 1 to 250 ns.
Also see
pulse_period (on page 13-148)
pulse_range (on page 13-149)
pulse_source_timing (on page 13-116)
pulse_trig (on page 13-152)
seg_arb_define
This command defines the parameters for a Segment Arb
®
waveform.
Usage
int seg_arb_define(int instr_id, long chan, long nsegments, double *startvals,
double *stopvals, double *timevals, long *triggervals, long *outputRelayVals);
The instrument identification code of the pulse card, such as VPU1 or VPU2
Channel number of the pulse card:
or
The number of values in each of the arrays (1024 maximum)
An array of start voltage values for each segment (in volts)
An array of stop voltage values for each segment (in volts)
An array of time values for each segment (20 ns minimum)
An array of trigger values:
• Trigger low: 0
•
An array of values to control the high endurance output relay:
• Open: 0
•
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