3.3.1.2 Fault Status Indicators
The Fault Status frame in the lower left side of the Status Window contains a grid of SSPA fault indicators. See Figure
Summary Alarm: The Summary Alarm is simply a logical ‘OR’ of any of the alarm indicators.
Unit Online: The Unit Online indicator is relevant in redundant systems. If the unit is clear of faults and active, the indicator will be green. If the unit is offline or in standby mode, the indicator will be red.
External Mute Alarm: The External (Ext) Mute line gives an indication via the M&C screen that the SSPA has been externally muted by
Auxiliary & Spare Alarms: The Auxiliary and Spare Alarms are configurable from the Settings Window. See Section 3.3.2.
Forward RF Fault: The Forward RF Fault Alarm is configurable from the Settings Window. See Section 3.3.2.
High Temperature Alarm: The Temperature Fault indicator is factory preset to alarm at 80°C. The amplifier will continue to operate up to 90°C. Beyond 90°C the DC power will be interrupted to the SSPA module. This measure will protect the sensitive microwave transistors from catastrophic failure. The fans and monitor and control circuitry will continue to operate normally. This function has approximately a 5°C hysteresis window which will allow the amplifier to
Low DC Current Alarm: The Current Fault is factory preset to alarm if the SSPA module current falls below 60% of its nominal value.
Low DC Voltage Alarm: The Voltage Alarm is factory preset to alarm if the SSPA module current falls below 80% of its nominal value.
BUC Alarm: The BUC fault is only active in units that are supplied with an optional
Fiber Alarm: The Fiber Alarm is configurable from the Settings Window. See Section 3.3.2.
RF Switch Alarms: The RF Switch 1 Alarm is only active if a 1:1 Redundant System has been configured in the M&C program. The RF Switch 2 Alarm is only active is a 1:2 Redundant System has been configured. These configuration are covered in Section 7, the Redundant System Concepts description.
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