Triggering Measurements - Fluke 8588A Operator's Manual

8588A/8558A
Operators Manual

Triggering Measurements

The Product has a triggering subsystem comprised of multiple layers as shown in
Figure 27. In the power-on default state, all layers are set to a state that allows
the Product to continuously make automatic readings. The triggering subsystem
can be configured to make readings in a non-continuous fashion, at very specific
occurrences of other events. For many applications, only one or two parameters
need to be changed in a given layer, leaving the other layers in the default state.
In the default power-on state, the triggering subsystem is configured to take a
measurement without waiting for anything, continuously making measurements.
Push  to immediately stop any measurements. In the stopped state,
 can be used to initiate a single cycle of the Trigger subsystem, to give one
measurement. Each subsequent push of  gives another measurement.
Push  again to resume continuous measurement.
In this simple example, pushing  puts the Initiate layer, into Continuous
OFF (or the Idle state), and readings are no longer made. With the Initiate layer
set to Continuous OFF, pushing  makes a reading by causing the
triggering subsystem to flow through the other three layers (Armlayer 2, Armlayer
1, and Trigger) as shown in Figure 27. In their default state Immediate, each of
the three layers is set to automatically flow to the next layer, on through to
Acquire where the Product makes a reading, and back up to the Initiate layer.
Push  again to put the Initiate layer back into Continuous ON (or the
free-run state) and the Product makes readings automatically.
104
Initiate layer
Idle Continuous OFF
Continuous ON
Arm:layer 2
Event detector
Arm:layer 1
Event detector
Trigger layer
Event
detector
Acquire
Figure 27. Trigger Subsystem
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