User's Manual

Remote Access Unit
Page 52 InterReach Fusion Wideband Installation, Operation, and Reference Manual
© 2015 TE Connectivity D-620616-0-20 Rev K • TECP-77-044 Issue 9 • March 2015
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.
RAUs pass converted IF to RF (Downlink) and converted RF to
IF (Uplink) signals between an
Expansion Hub and an attached passive antenna, where the signals are transmitted to wireless
devices as shown in Figure 13. Figure 14 shows the RAU block diagram.
Figure 13.
Remote Access Unit in a Fusion Wideband System
Figure 14. 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.