Keithley 4200A-SCS Reference Manual page 973

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Section 13: LPT library function reference

seg_arb_waveform

This command creates a voltage segment waveform.

int seg_arb_waveform(int instr_id, long chan, long NumSeq, long *Seq, double

*SeqLoopCount);

SeqLoopCount

Use this command to create a voltage segment waveform from the sequences defined by the

seg_arb_sequence command. The NumSeq parameter defines the number of sequences that make

up the waveform. The Seq parameter is an array that indicates the identification (ID) number for each

sequence in the waveform. The sequence ID numbers are set by the seg_arb_sequence

You can use this command to configure a waveform that repeats one or more of its sequences with

the SeqLoopCount parameter.

All sequence transitions must be seamless. Seamless means that the voltage level for the last point

in a sequence must equal the voltage level on the first point of the next sequence. The figure below

shows an example of a three-sequence waveform that uses looping (Sequence 1 is repeated). Notice

that the start and stop voltage values between sequences are the same, making it seamless.

The instrument identification code, such as VPU1 or VPU2

Channel number of the pulse card: 1 or 2

Total number of sequences in waveform definition (512 maximum)

An array of sequences using the sequence number ID

An array of loop values (number of times to output a sequence); loop value range is

Figure 509: Three-sequence waveform (with looping)

Model 4200A-SCS Parameter Analyzer Reference Manual

4200A-901-01 Rev. C / February 2017