Dual-Band Digital Optical Repeater
DW-010-7373-08
Installation & Operation Manual -
Preliminary
Dali Wireless
Proprietary and Confidential
13
Rev: 0-2
Feb 2011
0
2.2.2 DRU Introduction
The Dali DRU is located close to the antenna, and hence helps reduce coaxial feedline RF losses, leading to
increased system efficiency, reduced cooling requirements and small physical size.
The DRU is connected to the DAU via a fiber optic link, and can be installed 15km to 40km away from the DAU.
The DRU contains two optical interfaces, supported by independent optical transceivers, enabling daisy-chain
connection of multiple DRUs to reduce total fiber deployment cost and enhance architecture flexibility.
Figure 2-5 shows DRU block diagram (version with UL diversity presented).
Figure 2-5 Dali Dual-band DRU Block Diagram
The DRU Monitoring & Control function can be performed locally using an Ethernet (or RS-232) interface, or
remotely via the DAU when M&C signals are communicated over the fiber optic link.
The remote unit enclosure is sealed to the environment. Heat generated by the electronic components is
conducted to a rear heat sink and to the front lid. To increase efficiency of the heat sink, two external, long life,
environmentally sealed fans are provided on the top of the unit. Fans are controlled and monitored by remote unit
main processor. In a case of fan failure alarm will be generated and reported through the GUI.
SFP1
SFP2
Framer/
Deframer
FPGA
SerDes
SerDes
DDC2
DUC2
CFR
DPD
FB_2
CPU
Tx/Rx ANT2
DL: 1930-1990 MHz
UL: 1850-1910 MHz
AC-DC 110/220 to +27 VDC
110/220 VAC, 50/60 Hz
+5 VDC
DC-DC
+27 to +5 VDC
Dali DRU
+27 VDC
DNC2
DNC FB
ADC
ADC
UPC2
DAC
Fiber 1
Fiber 2
RF Processing
Digital Processing
AMP2
DNC1
UPC1
AMP1
DUC1
DDC1
DAC
ADC
Tx/Rx ANT1
DL: 869-894 MHz
UL: 824-849 MHz
FB_1
Ethernet
LNA1
LNA2
Rx ANT1
UL: 824-849 MHz
DNC1D
ADC
LNA
1D
DDC1D
DDC2D
Rx ANT2
UL: 1850-1910 MHz
DNC2D
LNA
2D
ADC
Pd
Pd
Pd
Pd
Pd
Pd
CommScope v. Dali Wireless
IPR2020-01409
DALI WIRELESS Exhibit 2003
Page 13 of 60
