Keithley 2450 User Manual

Section
3: Functions and features Model 2450 Interactive SourceMeter® Instrument
Reference Manual
3-92 2450-901-01 Rev. B/September 2013
Switching between measurement methods
The measurement methods that are available to you depend on how you are controlling the
instrument.
If you are using the front panel to control the instrument, you can choose any of the measurement
methods.
If you are using a remote interface to control the instrument, you can only use the trigger model
measurement method. When you switch to a remote interface, the trigger model measurement
method is automatically selected. If you switch from remote control to front-panel control, the trigger
model measurement method remains selected.
Using the front panel:
1. Press the front-panel TRIGGER key for two seconds. A screen displays with the available trigger
methods; the presently selected method is in yellow type.
2. Select the method you want to use.
3. If the instrument is in remote control, the instrument displays a confirmation screen. Select Yes to
change to local control.
4. Select HOME to return to the operating display.
Understanding synchronous triggering modes
Use the synchronous triggering modes to implement bidirectional triggering, to wait for one node, or
to wait for a collection of nodes to complete all triggered actions.
All non-Keithley instrumentation must have a trigger mode that functions similar to the SynchronousA
or SynchronousM trigger modes.
To use synchronous triggering, configure the triggering master to SynchronousM trigger mode or the
non-Keithley equivalent. Configure all other nodes in the test system to SynchronousA trigger mode
or a non-Keithley equivalent.
Synchronous master trigger mode (SynchronousM)
Use the synchronous master trigger mode (SynchronousM) to generate falling edge output triggers,
to detect the rising edge input triggers, and to initiate an action on one or more external nodes with
the same trigger line.
In this mode, the output trigger consists of a low pulse. All non-Keithley instruments attached to the
synchronization line in a trigger mode equivalent to SynchronousA must latch the line low during the
pulse duration.
To use the SynchronousM trigger mode, configure the triggering master as SynchronousM and then
configure all other nodes in the test system as Synchronous, SynchronousA, or to the non-Keithley
Instruments equivalent.
Use the SynchronousM trigger mode to receive notification when the triggered action on all nodes is
complete.

Keithley 2450 Specifications

General

Brand	Keithley
Model	2450
Category	Test Equipment
Language	English