EXPRESS DAS
Installation and Operations Manual
40
EXPRESS DAS Installation and Operations Manual – Version 2.2 November 2013
5.2.1
Main RF Module/Add-on RF Module (MRFM/ARFM) and Band Pass Filters
When receiving downlink (Tx) signals from each band through the R-Optic module, the MRFM/AFRM
filters the signals and amplifies them with the High Power Amplifier. The unit also filters uplink (Rx)
signals received through the antenna port and amplifies them as low noise to send the signals to the R-
Optic module.
The unit provides attenuation (ATT) to adjust gain. The following table shows the available units per
frequency band:
Combination
Unit Name
Description
BPF
Cavity Filter
Ceramic Filter
M 1900P
MRFM 850C+1900P
Dual
1900PCS
850C
MRU1900P
MRFM 1900P
Single
1900PCS
-
ARU AWS
ARFM 2100AWS
Dual
700LTE
AWS
A 900i
A900i
Dual
800iEN/900iDEN
-
Table 5
.
7 – Main RF Module/Add-on RF Module (MRFM/ARFM) and Band Pass Filters
5.2.2
Remote Power Supply Unit (RPSU)
The RPSU can accept DC or AC input. The DC/DC unit accepts -48VDC and o25V of DC power.
The AC/DC type takes 120V AC input and o25V of DC power. The following table shows the
acceptable input ranges for each option:
Unit
Range of input power
AC/DC
90 to 264 VAC
DC/DC
-42V to -56VDC
Table 5
.
8 – Remote Power Supply Unit – Range of Input Power
When ordering the MRU / ARU, make sure to specify the power type needed for your installation. The
input cable is different depending on input voltage requirements.
NOTE
: The RPSU does not have an ON/OFF power switch. The unit is active when power is
connected.
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