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If the radar trigger is generated externally, you must configure the correct PRF. Note that
dual PRF is not supported by passive IRIS when an external trigger is used. If the RVP
generates the trigger, you can configure any allowed trigger including dual PRF.
For other signal processing, you can configure any processing option. While passive IRIS
must scan the same as the active system, it can use dierent processing.
Task Scheduler
You must configure the TASK Scheduler with the same tasks that are run by the active
system:
The tasks must be in the same order as they are run on the active system unless you are
using Status–Slaving.
If your system can run in active or passive mode, set the Active/Passive menu selection
at the top of the Task Scheduler to Passive.
Task Scheduler Synchronization (Passive type)
The following table shows how passive IRIS can synchronizes the task that it is running to
the active control system.
Using the TSC Editor, you must
configure the TSC Monitor with the same tasks that are run
by the active system.
Table 32 Task Schedule Methods
Method Description Supported Scans
Multi-Tasking Passive IRIS tries to run the first task in the schedule. It waits until
the PRF and the starting angle match the task configuration and
then starts acquiring data for the task. Passive IRIS then waits for
the PRF and angle for the 2nd task in the Scheduler and so on. If at
any time it notices that the PRF and elevation angle are a better
match for the start of a
dierent task, then it interrupts to switch
tasks.
You may need to adjust the angle tolerances in Setup/ingest to
tune the task so that it runs properly. For example, if the angles of
the task are close together, the angle tolerance should be smaller
than the angle spacing. Also, the antenna may not achieve the
desired elevation angle, in which case it is better to modify the task
in passive IRIS to match the actual rather than the nominal
elevation angles.
Only continuous
PPI scans
Single–Tasking IRIS allows only one task to be scheduled in the task scheduler.
IRIS waits until the PRF and the starting angles match the task
configuration and then starts acquiring data for the task.
All scans
including RHIs.
IRIS User Guide M211317EN-E
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