Keithley 4200-SCS Reference Manual page 882

Section 11: Pulse Source-Measure Concepts
Pulse modes: Source, Segment ARB
LPT function:
Each channel of the 4502-PG2 pulse card can be configured to output its own unique Segment
®
ARB waveform. A Segment ARB waveform is made up of user-defined segments (up to 1024).
Each segment can have a unique time interval, start value, stop value, output trigger level (TTL
high or low), and output relay state (open or closed).
The seg_arb_define function includes parameters to set the number of segments (nSegments)
that make up the waveform, and arrays for start values (startvals), stop values (stopvals), time
values (timevals), trigger values (triggervals), and output relay states (outputRelayVals).
Refer to Segment ARB earlier in this section for additional information and an example of a source
only Segment ARB
Segment ARB waveform file
Pulse modes: Source only, Segment ARB
LPT function:
A Segment ARB waveform that is saved as a .ksf file can be loaded for each channel of the pulse
card. The seg_arb_file function is used to load the file.
Once a Segment ARB waveform is loaded, use
and then use
Segment ARB waveforms created using KPulse are saved as .ksf files, and can be loaded using
the seg_arb_file function. Refer to
Source range
Pulse modes: Standard, Full Arb, Segment ARB
LPT function:
Source range can be set independently for each pulse generator channel. There are two ranges
for the output level: 5 V and 20 V (into a 50 Ω DUT load). Selecting the 5 V range also selects high
speed pulse output. For the 5 V high speed range, the
Pulse Width
initiated.
Trigger mode
Pulse modes: Standard, Full Arb, Segment ARB
LPT function:
With the software trigger source selected, the pulse_trig function is used to select the trigger
mode (Continuous, Burst or Trig Burst) and initiate the start of pulse output. With an external
trigger source selected, the pulse_trig function is used select the trigger mode and arm pulse
output. Pulse output will start when an external trigger is applied to the EXTERNAL IN connector.
The
pulse_trig_source
section for details.
In the continuous trigger mode, the pulse card will output pulses continuously until the
pulse_output
number of pulses and then stop. This setting affects both output channels.
If Pulse delay
pulse output will start after the delay period expires.
11-14
seg_arb_define
®
waveform (see the User Manual,
seg_arb_file
to select the trigger mode and start pulse output.
pulse_trig
Section 13
pulse_range
can be set as short as 10 ns. This setting takes effect when the next pulse trigger is
pulse_trig
function is used to select the trigger source. Refer to
(turned off) functions are called. In a burst mode, it will output the programmed
is set to zero, pulse output will start immediately when triggered. If pulse delay is >0,
Return to Section Topics
Model 4200-SCS Reference Manual
Figure 1-21).
to turn on the appropriate channel,
pulse_output
for details on using KPulse.
Pulse period can be as short as 20 ns and
4200-901-01 Rev. S / May 2017
Triggering later in this
or
pulse_halt