190 Part I: Task Manager MB8100-00-00-806 © TEL 2003IF Counter at maximum (LightTrigger) THEN Activate DigitalOutput 2.See “Base Station that Controls Landing Lights” on page 195.Deactivate Digital Output nThe Deactivate Digital Output n action makes the Digital Out n line onthe system interface inactive. If this line does not exist on the current userinterface, the action has no effect.In base stations with a complex set of Task Manager tasks, you need tounderstand exactly how this action works. The actual deactivation of the digitaloutput doesn’t happen till the end of a processing cycle. So the task list canactivate and deactivate a digital output many times, but the output line will onlyever be deactivated if the last action for that digital output is to deactivate it.Tx Relay actionsTx relay override actions can enable, disable, or toggle the Tx Relay systemflag. This gives you an additional layer of control over the Tx Relay Driver lineon the system interface. When the base station enters Run mode, the flag isenabled.When the Tx Relay system flag is disabled, the Tx Relay Driver line cannot goactive.When the Tx Relay system flag is enabled, the base station can control anantenna relay using the Tx Relay Driver line, switching the relay beforepowering its transmitter up.If the base station is not fitted with a system interface board that provides a TxRelay Driver line, the Tx Key system flag has no effect.AlarmAlarm actions make it possible for you to configure the way that the base stationresponds to alarm conditions.Over the air alarm actionsOver the air alarm actions can turn the base station’s over the air alarm on oroff. Indeed, Task Manager action is the only way that this alarm can be startedor stopped.When the base station enters Run mode, Task Manager ensures that the overthe air alarm is turned off.When Task Manager turns on the over the air alarm, the base station startstransmitting the alarm over the air according to Configure > Alarms >Notification Methods.When Task Manager turns off the over the air alarm, the base station stopstransmitting the alarm.Over the line alarm actionsOver the line alarm actions can turn the base station’s over the line alarm on oroff. Indeed, Task Manager action is the only way that this alarm can be startedor stopped.When the base station enters Run mode, Task Manager ensures that the overthe line alarm is turned off.
