
ArcLight Hub User’s Guide
Component Operating Procedures
Rev. 001
1081006
5-71
5.14 Leader
VMBR
5.14.1 Overview
The ArcLight Hub Leader VMBR and its’ associated RF equipment is
used for closed-loop uplink power control in ArcLight deployments that
require such functionality. The Leader VMBR is installed at the Hub
site.
Figure 5-40 shows the front panel of the Leader VMBR.
Figure 5-40. Leader VMBR Front Panel
5.14.2 Physical Interfaces
Refer to the ArcLight Hub Installation Guide for the Leader VMBR
interface description.
5.14.3 Installation
The Leader VMBR is just a VMT that is rack-mountable and co-located
at the ArcLight Hub. Its output signal is transmitted over the Hub
forward link and received at the MCD. When closed-loop power control
is enabled, its signal is used as the uplink signal power reference for
the entire VMT population. Refer to the ArcLight Hub Installation Guide
for more information about the Monitor VMBR installation.
5.14.4 Configuration
The Leader VMBR is configured using its serial port or via its Ethernet
port using Telnet. The parameters that require configuration are the
Ethernet interface IP address and return link signal parameters. Once
those are configured, the return link traffic can be sent and received by
the Hub MCD.
5.14.5 Operation
In normal operation the Leader VMBR is connected to the ArcLight Hub
main LAN segment 10.1.1.0/24 via its Ethernet interface, e.g.
10.1.1.125/24. When in normal operation it usually requires very little
interaction. If needed it can be accessed using its Telnet server.
5.14.6 Montioring
The Leader VMBRethernet connectivity is monitored using the IsItUp
software at the Support Server.
5.14.7 Troubleshooting
Refer to the ArcLight Hub Troubleshooting Guide for Leader VMBR
trouble-shooting instructions.
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