Keithley 4200A-SCS

Model 4200A
-SCS Parameter Analyzer Reference Manual Section 9: Keithley External Control Interface (KXCI)
4200A-901-01 Rev. C / February 2017 9-65
TS
This command sets the trigger source that is used to trigger the pulse card to start its output.
Usage
TS A, B
A
Pulse card channel: 1 to 8; the largest value is the number of channels in the
system
B
Trigger source:
• Software triggered: 0
• External — Initial Trigger Only — Rising Edge: 1
• External — Initial Trigger Only — Falling Edge: 2
• External — Trigger Every Pulse — Rising Edge: 3
• External — Trigger Every Pulse — Falling Edge:
4
Corresponding LPT library functions
pulse_trig_source (on page 13-155)
Details
With the Software trigger source selected, the PG command selects the trigger mode (Continuous,
Burst, or Trig Burst), and initiates the start of pulse output.
Since trigger source is a card level setting and NOT a channel setting, using channel 1 or 2 sets the
card to the specified source card 1. Similarly, channel 3 or 4 sets the source for card 2.
With an external trigger source selected, the PG command will select the trigger mode and arm pulse
output.
Pulse output will start when the required external trigger pulse is applied to the Trigger In connector.
There is a trigger-in delay of 560 ns. This is the delay from the trigger-in pulse to the time of the rising
edge of the output pulse.
For an "Initial Trigger Only" setting, only the first rising or falling trigger pulse will start and control
pulse output.
For a "Trigger per Pulse" setting, rising or falling edge trigger pulses will start and control pulse
output. After the initial pulse, the pulse output, either continuous or burst, will be output based on the
internal pulse generator clock. If pulse-to-pulse synchronization is required over higher count pulse
trains, use a "Trigger per pulse" mode.
Example
TS 1, 1
This command string sets the trigger source to External – Initial Trigger Only – Rising Edge.
Also see
PG (on page 9-60)