Idle And Initiate; Arm Layer1; Arm Layer2; Trigger Layer - Keithley 7002-HD User Manual

5-8 IEEE-488 Operation

Idle and initiate

The instrument is considered to be in the idle state whenever it is not operating
within one of the layers of the Trigger Model. The front panel ARM indicator is off
when the instrument is in the idle state. While in the idle state, the instrument
cannot perform any scan functions. Over the bus, there are two SCPI commands
that can be used to take the instrument out of the idle state: :INITiate or
:INITiate:CONTinuous ON.

Arm layer1

NOTE
In general, the instrument requires an arm event to allow operation to proceed to the
next layer (Arm Layer 2). With the Immediate control source selected
(:ARM:SOURce IMMediate), operation immediately proceeds to the next layer when
the instrument is taken out of the idle state. The *RST and :SYSTem:PRESet com-
mands also set the arm control source to Immediate. With one of the other control
sources selected, the instrument will wait until the appropriate event occurs.

Arm layer2

NOTE
In general, the instrument requires a scan event to allow operation to proceed to
the next layer (trigger layer). With the Immediate control source selected
(:ARM:LAYer2:SOURce IMMediate), operation immediately proceeds to the next
layer. The *RST and :SYSTem:PRESet commands also set the scan control
source to Immediate. With one of the other control sources selected, the instru-
ment will wait until the appropriate event occurs.

Trigger layer

NOTE
In general, measure events control the channel scan rate. With the Immediate
control source selected (:TRIGger:SOURce IMMediate), operation immediately
proceeds to the Delay. The *RST command also sets the measure control source
to Immediate. With one of the other control sources selected, the instrument will
wait until the appropriate event occurs.
For front panel operation, this layer is called the arm layer.
For front panel operation, this layer is called the scan layer.
For front panel operation, this layer is called the channel layer.
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Section 5 topics
Model 7002-HD User's Manual