Trigger Model; Idle - Keithley 2750 User Manual

8-2 Triggering

Trigger model

The flow chart in
called a trigger model because it is modeled after the SCPI commands used to control
triggering.
NOTE
Figure 8-1
Front panel trigger model (without scanning)
Control
Source
Immediate
External

Idle

When not scanning and in the continuous trigger mode (factory default setup), the instru-
ment will not stay in idle. Operation will continuously fall through the idle state and pro-
ceed to the Event Detection block of the trigger model. When in the one-shot trigger mode
(*RST default setup), the TRIG key must be pressed to take the instrument out of idle.
After each measurement, the instrument returns to idle and requires the TRIG key to be
pressed to continue. The FACT (factory) default setup or *RST default setup is selected
from the SHIFT > SETUP menu (see
When scanning, the unit is considered idle at the end of a scan operation when the reading
for the last channel remains displayed. To restore triggers, press SHIFT and then HALT.
See Section 7
Figure 8-1 summarizes triggering as viewed from the front panel. It is
For scanning, the trigger model has additional control blocks, such as a Timer.
These are described in
ger model, which is based on bus operation, is shown and discussed later in this
section ("Remote programming — triggering," page
Idle
Event
Detection
Auto Delay or
Manual Delay
for details on scanning.
Model 2750 Multimeter/Switch System User's Manual
Section 7 (Figure 7-1 and
Device Action
"Defaults and user setups," page
Figure 7-2). The complete trig-
8-12).
Output
Trigger
1-19).