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Trigger model (GPIB operation)
This section describes how the Model 2000 Multimeter operates over the GPIB bus. The
flowchart in Figure 4-11 summarizes operation over the bus and is called the trigger model.
It is called the trigger model because operation is controlled by SCPI commands from the
Trigger subsystem (see Section 5 for more information). Key SCPI commands are included
in the trigger model.
Idle and initiate
The instrument is considered to be in the idle state whenever it is not operating. While in
the idle state, the instrument cannot perform any measure or scan functions. You can send
two commands over the bus to remove the instrument from the idle state:
:ABOrt
*RCL
:SYST:PRES
Language Change
No
Yes
Idle
and
Initiate
:Trigger:Signal
Control
Source
:Trigger:Source Immediate
:Trigger:Source External
:Trigger:Source Timer
:Trigger:Source Manual
:Trigger:Source BUS
:Trigger:Delay <n>
:Trigger:Delay:AUTO <b>
Delay
Device
Action
(see Figure 4-12)
:Sample:Count <n>
Another
Sample
?
:Trigger:Count <n> Infinite
Another
Trigger
?
:INIT (:IMM)
or
:INIT:CONT ON
?
Event
Detection
:INIT (:IMM)
or
:INIT:CONT ON
?
No
No
No
Yes
Yes
Output
Trigger
Yes
Figure 4-11
Trigger model
(remote opera-
tion)
2000-900 (J - Aug 2010) BOOK.fm Page 29 Wednesday, October 12, 2011 12:29 PM
108


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