TB8100 Service Kit User’s Manual Task Manager Examples 193Task Manager ExamplesTask Manager makes it possible for you to build complex functions into thebase station. Here are some examples of to give you an idea of what can bedone.Important: While Tait has carefully tested Task Manager, noguarantee can be given that these examples will work correctly foryour system. Make sure that you thorougly test any set of TaskManager tasks before commissioning the system.Repeater ChangeoverA line-controlled base station is connected to a console that provides tone onidle. The following Task Manager tasks automatically convert the TB8100 to atalk-through repeater if the line fails. When the line is re-established, theTB8100 reverts to line-controlled operation.IF Base station in Run mode THEN Disable talk through repeater.This disables the base station’s talk through repeater mode whenever it entersRun mode.IF Balanced input low THEN Enable talk through repeater.IF Balanced input low THEN Disable line-controlled base station.IF Balanced input low THEN Start over the air alarm.If the line fails, the input line level falls below the prescribed minimum. Thistriggers Task Manager actions that switch off the line-controlled base stationmode, enable the talk through repeater mode, and start sending alarm pips overthe air.IF NOT Balanced input low THEN Disable talk through repeater.IF NOT Balanced input low THEN Enable line-controlled basestation.IF NOT Balanced input low THEN Stop over the air alarm.When the line is re-established, Task Manager actions re-establish the line-controlled base station function and stop the alarm.Data and Speech ServiceA repeater needs to relay speech as well as data. The speech needs to be pre-emphasised while the data needs the full band from < 50 Hz to 3000 Hz.Speech is sent with a CTCSS tone.The base station needs to be able to automatically change between repeatingpre-emphasised audio and repeating full band audio.To achieve this, follow these steps:1. Set up Channel 1 as a speech repeater. The channel profile (Signal Path tab)is set to De-emph Speech Band / Pre-emph Speech Band.2. Set up Channel 2 as a data repeater. The channel profile (Signal Path tab) isset to Flat Full Band.3. Set Timer 1 to 150 milliseconds, corresponding to the time that the basestation needs to decode subaudible signalling.
