User's Manual

EMS Wireless Operator’s Manual
EkoLink II
17
1.2 Functional Overview
There are four main components comprising the EkoLink II System: The Hub, the
Remote, the Fiber, and the Antenna. Figure 2 is a functional diagram of the
EkoLink II system.
1.2.1 Hub
The Hub interfaces directly to the service provider’s BTS and is typically located in
the equipment or utility room in most installations. It is recommended that the
distance from the BTS to the Hub be kept as short as possible to make the EkoLink
II “transparent” to the service provider. The Hub is the heart of the system and
contains a microprocessor based controller which automatically sets the desired
power level for each of the remotes during installation. At the user’s discretion, the
power level may be adjusted at each remote according to individual requirements.
In most applications, however, the hub will measure the amount of optical loss in
each fiber and set the gain accordingly. This greatly reduces the installation and
setup time.
EkoLink II
HUB
Remote
1
Antenna 1
+20 dBm DL
Remote
2
Antenna 2
+20 dBm DL
Remote
3
Antenna 3
+20 dBm DL
Remote
4
Antenna 4
+20 dBm DL
BTS
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L
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DL
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W
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U
L
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DL
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W
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U
L
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DL
Figure 2. EkoLink II functional diagram.
In addition to automatically adjusting the initial gain settings, the Hub continuously
monitors the operational status of each of the Remote units.
If more than one Hub is used, one Hub will be designated the Master Hub and the
others will be slaved to that Hub. The Master Hub has a Master controller daughter
card which is the chief difference between it and the Slave Hubs.