Iridium NAL SHOUT ns User Manual page 28

SHOUT ns/nsx User Guide Version D
The SHOUT ns tracking mode has configuration parameters that control the reporting
capabilities and power consumption. The SHOUT ns can be configured to send reports at an
interval ranging from continuous (as fast as the transmitter can handle) to once every 7 days.
The SHOUT ns can operate in a low-power mode whereby the device turns off and sleeps
between reports. When operating in low-power mode, the device consumes less than 110 μA
of current during sleep.
Tracking may enter the low-power mode while the USB and Bluetooth user interfaces are in
use. Use the command AT^PWRAO (Power Always On) to keep the SHOUT ns turned on in this
situation. This setting prevents the SHOUT ns device from sleeping and greatly increases power
consumption; disable this command when finished using the USB or Bluetooth interface. Refer
to the document "AT Commands for Model SHOUT ns" [1] for additional details.
The more commonly used tracking parameters are "Time Between Reports" (^TBR), "Time to
Keep Trying" (^TTKT), and "Callable" (^CAL). The following features can also be utilized to
further tailor tracking mode to a specific application: "GPS power" (^GAO), "communication
link availability" (^LNK), "profile selection" (^TPN, ^TPT, ^TPE), motion detection, and
geofencing.
"Time Between Reports" (^TBR) and "Time to Keep Trying" (^TTKT) adjust how often to send
reports and how long the SHOUT ns tries to achieve a successful report transmission.
Decreasing the "Time Between Reports" increases data points for more detailed situational
awareness, and increasing the "Time to Keep Trying" improves the chances of transmission
success. Both of these options also directly affect the SHOUT ns power consumption.
For supporting message-receiving scenarios, referred to as "Callable," the SHOUT ns Iridium
modem can be set to be on at all times by using the ^CAL command. This configuration
prevents the SHOUT ns device from sleeping and greatly increases power consumption.
To facilitate power management and time to acquire location, configure the SHOUT ns to
control the power state of the GPS module. The module can be set to be on at all times using
the command ^GAO, which prevents the GPS from turning off after obtaining a valid fix.
While in tracking mode, the SHOUT ns can load tracking profiles dynamically. By default, there
are two tracking profiles set aside for normal tracking and emergency tracking. Typically, when
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