Multi-Channel Synchronization With The Segment Arb Mode - Keithley 4200-SCS Reference Manual

Section 11: Pulse Source-Measure Concepts
// Select External – Initial Trigger Only (Rising) trigger sources:
pulse_trig_source(VPU1, 1);
pulse_trig_source(VPU2, 1);
pulse_trig_source(VPU3, 1);
// Enable the channel 1 outputs:
pulse_output(VPU1, 1, 1);
pulse_output(VPU2, 1, 1);
pulse_output(VPU3, 1, 1);
// Arm (waiting for external trigger) pulse generators and select the Continuous trigger mode:
pulse_trig(VPU1, 1);
pulse_trig(VPU2, 1);
pulse_trig(VPU3, 1);
// Start Trigger Output for Model 4205-PG2-3. This will start the synchronized pulse output:
pulse_trig_output(VPU3, 1);

Multi-channel synchronization with the Segment ARB Mode

There are two methods for utilizing the Segment ARB capability, depending on the number of
channels that are synchronized. Each method uses a different trigger-in source mode, specified by
the
pulse_trig_source
When using Segment ARB for 1 or 2 channels on a single card, no trigger cabling is required and
the trigger source is set to Software. See
the corresponding definition in
by-segment basis and will be output using the Trigger Out connector.
Figure 11-19
An example of a Segment ARB waveform and its associated trigger output waveform
Pulse
Definition
Trigger
Definition
Table 11-37
Segment ARB definition with trigger definition for intra-waveform synchronization, as
shown in
11-36
function.
Table
2
1
5 ms
Figure 11-19
Segment Start V Stop V Time
1 0 0
2 0 8
3 8 8
4 8 0
Return to
Figure 11-19, which shows an 8-segment waveform, and
11-37. Note that the trigger can be controlled on a segment-
3
4
5
Trig/Sync HEOR
250µs 0 1
1µs 1 1
5µs 0 1
50µs 0 1
Section Topics
Model 4200-SCS Reference Manual
5 us
8
7
Not to scale
6
4200-901-01 Rev. S / May 2017