User's Manual Part 1

Remote Access Unit
Page 54 InterReach Fusion Wideband Installation, Operation, and Reference Manual
© 2013 TE Connectivity Ltd D-620616-0-20 Rev H • TECP-77-044 Issue 7 • May 2013
OVERVIEW
TheRemoteAccessUnit(RAU)isanactivetransceiverthatconnectstoanExpansionHubusing
industry‐standardCATVcable,whichdeliversRFsignals,configurationinformation,and
electricalpowertotheRAU.
AnRAUpassesconverted1FtoRF(Downlink)andconvertedRFto1F(Uplink)
signalsbetween
anExpansionHubandanattachedpassiveantennawherethesignalsaretransmittedtowireless
devicesasshowninFigure17.
Figure17.
Remote Access Unit in a Fusion Wideband System
Figure18.Remote Access Unit Block Diagram (Multiband)
Downlink Path: The RAU receives downlink IF signals from a Fusion Wideband Hub using 75 Ohm CATV cable. It converts
the signals to RF and sends them to a passive RF antenna using 50 Ohm coaxial cable. Also, the RAU receives configuration
information from the Fusion Wideband Hub using the 75 Ohm CATV cable.
Uplink Path: The RAU receives uplink RF signals from a passive RF antenna using 50 Ohm coaxial cable. It converts the
signals to IF and sends them to a Fusion Wideband Hub using 75 Ohm CATV cable. Also, the RAU sends its status information
to the Fusion Wideband Hub using CATV cable.
The RAU receives 54VDC power from the Fusion Wideband Hub port through the 75 Ohm CATV cable center pin.
Downlink
to RAU
Uplink
from RAU
Fusion Wideband
Main Hub
RAU
Fusion Wideband
Main Hub
Downlink
to antenna
Uplink from
antenna
Diplexer
Gain
Control
Gain
Control
Gain
Control
Gain
Control
DC
Power
FSK
&
Micro
Gain, RF Filter &
Power Amplifier
PLL
PLL
Gain & RF Filter
Gain, RF Filter &
Power Amplifier
Gain & RF Filter
Band 1
Diplexer
Band 2
Diplexer
Diplexer
RF
Connector
CATV
Connector
Signals
DL IF
UL IF
DC Power
FSK
Ref Clock
Band 1/3*
Band 2
* For FSN-W2-80519-1 RAU when Band 3 is active.