User's Manual Part 1

Table Of Contents
3EM21522AAAA Functiona
l
Description
Issue 1, March 2008 DTR-0200-SA-SIRIUS
2-11
Control commands for status requests and operating parameter modifications from
the operator interfaces are received and processed by the main controller.
The controller reports problem conditions through dedicated interfaces and also indi-
cates current status and alarms via front panel LEDs.
Repeater identity can be configured remotely or locally via the controller. Configura-
tion includes repeater identity (repeater name, password, local IP address, two
remote NMS IP addresses
, and SNMP security variables).
The functional software components of the controller are:
Repeater protection via continuous local monitoring of all main blocks.
The output coupler, HPA, and HPA power supply are continually monitored. If any
monitored parameter exceeds its threshold,
the RF is shut down and the Network
Management Center (NMC) is notified. Hazardous conditions shut down the
repeater. Under certain conditions clearing the event will automatically restart the
repeater.
HPA RF output Automatic Power Level Control (APLC).
The APLC loop checks RF output level reported by the RF output coupler and
c
hanges the up converter out-put level.
Performance of two-way communication with the NMC.
Communication can be via either of the following:
Dial-up modem through a PSTN line
Ethernet to the Management Center via WAN
Forward channel using the input channel and satellite return channel.
Load, initialize, and monitor the supervisor controller, the GPS receiver, the up
converter
, the VSAT receiver, the modem, and the modulator.
Perform software upgrade for the main controller, supervisor controller, and mod-
ulator.
Monitor RF subsystems; HPA, HPA power supply, and RF coupler
Event Logging is written to the EEPROM and accessible from WEB/embedded
FTP server via NMC
.
Self monitoring and environment monitoring (temperature, fans, voltage, cur-
rent)
Power-up Test
– on power-up the main controller performs a self-test (POST) and
waits for all other subsystems to perform POST of their major components and
report results. Any main block problem causes the repeater to shut down and an
attempt is made to notify the NMC. Notification is attempted via the modem or
Ethernet to the NMC.