User Manual

AS4000 Wireless Local Loop
System Overview
GSI 002
605-0000-430
Issue 1.2 Date 7/4/99
Page 10 of 8
• The RF Combiner Shelf also contains an alarm extension unit which receives alarm
information from the AS4000 equipment, analyses it and then informs the local suite
alarm system to which certain alarms are extended. Depending on the severity of the
condition, the alarm extension unit recognises either a Prompt alarm (immediate
attention required) or a Deferred alarm (action can be delayed).
Level Control Unit
The Level Control Unit manages the performance of the RF combiner shelf and monitors
/controls the TX power and RX gain levels.