Paradise Datacom RA 5785, Руководство по эксплуатации

Страница: 30 / 82

30 208143 REV - Operations Manual, HPA3, Mini Compact Outdoor SSPA
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 3-9, Item [ 2 ] . A green indicator signifies proper operation; red
signifies a fault condition.
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 J4-Pin B. This external mute alarm can be
configured to trigger a summary alarm if desired. The factory default is to signal a External
Mute fault but no Summary Alarm.
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 re-enable itself when the ambient temperature is reduced by 5°C. The
Temperature Alarm is intended to warn the operator of possible fan problems and eventual
amplifier shutdown.
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 L-Band
Block Up Converter module. If the Up Converter’s phase locked local oscillator loses lock, a
BUC alarm is set and the amplifier is muted so that spurious RF cannot be transmitted.
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.