EXPRESS DAS
Installation and Operations Manual
EXPRESS DAS Installation and Operations Manual – Version 2.2 November 2013
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5.2
MRU/ARU Components
As an example, the figure below shows the various components of the MRU supporting the 850 Cellular
and 1900 PCS bands. These components are further explained in this section.
Figure 5
.
3 – MRU 850C+1900P Internal View
Unit Name
Description
Enclosure
Wall Mount, Rack Mount. Indoor, Outdoor Wall Mount;
System operation is checked through LED panel on bottom panel
MRFM /
ARFM +BPF
Main/Add-on RF Module:
Filter and amplify Tx signals;
Filter and amplify Rx signals;
Remove other signals through BPF
RPSU
Remote Power Supply Unit:
Input power: DC -48V or AC120V, Output power: 25V
For 120V input of AC/DC;
For -48V input of DC/DC
R-OPT
(MRU Only)
Remote Optic:
Convert downlink RF signals to optical;
Convert uplink optical signals into RF;
Compensates optical loss interval
Communicates with BIU or OEU though the FSK modem
RCPU
Remote Central Processor Unit:
Controls signal of each unit
Monitors BIU/ODU/OEU status through FSK modem Communication
Table 5
.
6 – MRU / ARU Components
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