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Model 4200A

-SCS Parameter Analyzer Reference Manual Section 5: Pulse measur

e and pulse generator units

4200A-901-01 Rev. C / February 2017 5-67

Trigger mode

With the software trigger source selected, using the pulse_trig function selects one of the

following trigger modes and initiates (triggers) the start of pulse output:

• Continuous: This trigger mode continuously outputs pulses when pulse output is started.

• Burst or Trig Burst: These trigger modes output a burst of pulses when pulse output is started. A

burst is a finite number of pulses (1 to 2

-1). The only difference between burst and trig burst is

the behavior of trigger output (refer to Pulse generator card output trigger (on page 5-68

)).

When using the burst or trig burst trigger mode, make sure to first set the pulse count before starting

pulse output. The pulse_burst_count (on page 13-138) function is used to set the burst count.

Example LPT function sequence: Basic triggering

The following LPT function sequence uses the software trigger to initiate a 3-pulse burst for both

channels, where both the pulse and trigger output three pulses:

// Stop pulse generator output:

pulse_halt(VPU1);

// Select software trigger source:

pulse_trig_source(VPU1, 0);

// Set channel 1 for a burst count of 3:

pulse_burst_count(VPU1, 1, 3);

// Turn channel 1 on:

pulse_output(VPU1, 1, 1);

// Select the trigger burst mode and trigger start of burst output:

pulse_trig(VPU1, 2);

Pulse-measure synchronization

Synchronize the pulse-measure operation of a pulse generator card.

Keithley 4200A-SCS Reference Manual

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