4RF Aprisa XE, Руководство пользователя

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Troubleshooting | 204
Identifying causes of alarms
The following are possible causes of an alarm.
LED Colour Possible causes
OK Orange A minor system alarm is set
Red A major system alarm is set
RX Orange Low RSSI or AGC limits have been exceeded
Red Receiver power supply or synthesizer failure
TX Orange AGC, transmitter temperature, forward power or reverse power limits have
been exceeded
Red Transmit power supply or synthesizer failure
OK LED
Colour Alarm condition Suggested action
Orange Fan failure Check that the fans are not blocked and can spin freely.
Orange Interface card
mismatch
Using SuperVisor, check that the expected interface card and the
fitted interface card are the same.
Red Modem lock A modem lock alarm is generally seen when other conditions such
as low RSSI are present. If there are no other alarms indicated,
check the following:
The terminal clocking is set up correctly.
Both terminals are using the same modulation.
Both terminals are using the same version of software.
External RF Interference from equipment operating in adjacent
channels.
Check the constellation pattern for evidence of disturbances in the
RF path.
Compare RSSI with the expected values from the original path
engineering calculation. Investigate any large differences.
If the fault persists, contact your local representative.
Red Interface alarms Check that the E1 or Ethernet interface cables are fitted correctly
and the equipment they are connected to is functioning correctly.