TB8100 Service Kit User’s Manual Monitoring Alarms 151Current The Current group of alarms detects excessive or inappropriate current draw.If an alarm shows red, the PA needs servicing.Supply voltage The PA can detect whether its power supply voltage is too high or too low.Supply voltagehighThe PA supply voltage is 29 V or more.1. The third party power supply is incorrectly configured.2. A voltage regulator has failed.Note: The base station is not type-approved for operation when thesupply voltage is outside the specified range.Supply voltagelow The PA supply voltage is 26 V or less, probably because the battery is runninglow. The fault condition disappears when the voltage exceeds 26.1 V.Temperature high This group of alarms shows whether the temperature in the driver, Final 1, orFinal 2 output stage has exceeded the configured threshold. If a temperatureexceeds a built-in limit, the PA folds back its power output until thetemperature is within the normal range.To see the actual temperatures, select Diagnose > Power Amplifier > ControlTests.SystemThe System area displays alarms that are triggered by system conditions. Thesealarms do not indicate base station faults. You can set a threshold for thesealarms if this is appropriate for your system. For example, if the base stationshould always receive a signal on the balanced input, you can set a threshold sothat the alarm is triggered if the signal fails. Otherwise leave the threshold atzero, so that the alarm is never triggered.Alarm DescriptionDriver high The driver is drawing excessive current. A fixed limit has beenexceeded.Final 1 The Final 1 output stage is drawing excessive current. A fixedlimit has been exceeded.Final 2 The Final 2 is drawing excessive current. A fixed limit has beenexceeded.Imbalance One of the final stages is drawing significantly more currentthan the other.
