Eclipse Quattro
Eclipse Quattro
Product Overview
Revision 2a, November 2004
Contents
Introduction...................................................................................................... 3
Key Features..................................................................................................... 3
System Overview............................................................................................... 6
Equipment Configurations............................................................................. 10
Appendix A: Eclipse RAC40 .......................................................................... 15
Appendix B: Channel Arrangements ............................................................ 20
Abbreviations.................................................................................................. 21
Further Information ...................................................................................... 22
In situations where fiber is not available or cannot be installed, operators have often
been forced to replace existing split-mount equipment with so-called ‘trunking’ radio
equipment, which are characteristically all-indoor systems designed to scale in
capacity up to 14xSTM-1. This equipment is large, more difficult to install and maintain,
requires expensive retraining and new spares costs, as well as the installation of
waveguide and supporting pressurization sub-systems.
Key Features
Eclipse Quattro offers a number of key benefits:
4 RU 2x44 RU
Eclipse
Traditional
(Harris Megastar)
Competing
4xSTM1
Trunk SDH
Radio
3xSTM1
Competing
2xSTM1
Competing
PDH Radio
256xE1
Equipment Change Out
1xSTM1
192xE1
128xE1
64xE1
32xE1
16E1
8E1
4E1
The novel design features of Eclipse combine to provide the most efficient solution
available yet for the construction of wireless transmission networks. These features
include:
Eclipse’s nodal architecture redefines the way wireless backhaul networks are
designed, procured, implemented, upgraded and operated. Nodes are easy to
implement and expand because inbuilt simplicity and commonality transforms directly
into cost savings.
Super-PDH
Eclipse offers an alternative to traditional backhaul network
architectures with its new high-speed Super-PDH networking that
expands the reach of PDH from the network edge right through to the
high-capacity core.
Network node functions are integrated into the design, including traffic add-and-drop,
north-south traffic aggregation and concentration, with options for hardware, ring and
diversity path protection, all with built-in switching.
The INU provides a highly modular design, enabling quick maintenance through the
exchange of hot swappable access cards, and easy upgrade to add new links into an
existing node.
Local add-and-drop traffic can be changed or expanded using optional Data Access
Cards, providing a selection of traffic interface densities and types, including both Time
Division Multiplexed, or TDM (E1/DS1, E3/DS3, STM1/OC3), or Ethernet (IP/ATM), or
a combination of the two.
A new link can be added to an existing node by inserting another Radio Access Card
to the shelf. Traffic can then be reconfigured through the node by software control.
ODU300
The Eclipse ODU300 is the most flexible outdoor unit available on
the market, designed to carry capacities from 4x E1/DS1 to 2x
STM-1/OC-3 and modulation rates from QPSK to 256 QAM without
any hardware modification, spanning frequency bands from 5 to
23 GHz in the same mechanical design.
Capacity Options
The Eclipse Quattro supports Nx64xE1 or Nx84xDS1 Super-PDH configurations
including terminal, repeater and nodal arrangements. Repeater and node sites include
built-in traffic add and drop capability, instead of using external multiplexers. SDH and
SONET configurations are also supported where Eclipse Quattro support transparent
NxSTM1/OC3 up to a total capacity of 622 Mbps. The capacity/modulation options are
listed in Table 1.
Using the standard Eclipse RAC30 Radio Access Card, an alternated or adjacent
channel arrangement can be used to combine up to four channels on a single antenna.
Using the combiner arrangement, a maximum of two ODUs can operate on the same
polarization.
With the introduction of a new Radio Access Card (RAC40), Eclipse Quattro supports
cross-polar interference cancellation (XPIC). This allows the same frequency to be re-
used on a link, doubling the amount of traffic carried using a single frequency pair.
The RAC 40 uses a sample of the unwanted signal received on the opposite
polarization to cancel the co-channel interference caused in the wanted signal. This
cancellation results in an improved polarization discrimination. More details of this card
are provided in Appendix A.
CH1V
64xE1/84 DS1
V
CH2V
64xE1/84 DS1
CH1H
64xE1/
84 DS1
H
CH2H
64xE1/
84 DS1
4xSTM1/OC3
Network Interface
In the case of a 4xSTM1/OC3 terminal, the 4xINU’s can be replaced by just two
INUe’s, as shown in Figure 5. This reduces by half the number of NCC, NPC and FAN
cards required, while occupying the same amount of rack space.
CH1V
STM1
V
CH3V
STM1
CH2H
STM1
CH4H
STM1
4xSTM1
CH1V
64xE1 64xE1
V V
CH4V
CH2V
64xE1 64xE1
CH3H
CH1H
64xE1 64xE1
H H
CH2H
CH4H
64xE1 64xE1
For Ring Node applications the arrangement is identical to the repeater configuration
above. In this case traffic is protected by the Eclipse Super-PDH Wrapping mechanism
(see Concentric Rings below).
CH1AV
CH3AV
V V
CH2AV
CH4AV
CH1AH
CH3AH
H H
CH2AH
Main
CH4AH
Main Antenna
Antenna
CH1BV
CH3BV
V V
CH2BV
CH4BV
CH1BH
CH3BH
H
CH2BH
H
CH4BH
Diversity
Diversity 4xSTM1/OC3 Antenna
Antenna or 4x16xE1/DS1
Add & Drop
System Performance
Eclipse Quattro utilizes passive ODU combiners in 4+0 and 2+0 co-polar applications.
This combiner and associated flex waveguide connections contribute an additional
system gain loss. However, these additional losses are offset by the improved system
gain provided by 64 QAM modulation for 256xE1 applications.
Table 3 below details system performance specifications for Eclipse Quattro. Power
output and receiver threshold figures are referenced to the ODU antenna flange
(excluding additional ODU combiner losses), while the net system gain is the total
including ODU combiner losses at each end of the link.
Utilizing the same indoor node and outdoor unit components from the existing Eclipse
platform, Eclipse Quattro brings together trunk and access wireless systems into an
integrated network solution that streamlines deployment and simplifies maintenance
and spares holding.
Gateway Node
NxE1
NxE1
Add/Drop
Add/Drop
Eclipse Super-PDH
256xE1/336xDS1
Concentric Ring
Node C Network Node A
64xE1/84xDS1
Ring 1
Node B
64xE1/84xDS1
Ring 2
64xE1/84xDS1
Ring 3
64xE1/84xDS1
Ring 4
NxE1
Add/Drop
Figure A3 below shows the improvement in XPD (x-pole discrimination) with and
without the XPIC function provided by the RAC40. XPIC will allow a 20 dB worse
interference level for the same performance (signal to noise ration, SNR), compared to
the same system without XPIC. Figure A3 shows an improvement of 20 dB for the
interferer only 10 dB below the wanted signal and for a constant SNR at the 10-6 BER
level.
XPIC Disabled
XPIC Enabled
34.0
33.0
32.0
Required SNR for 10 BER
31.0
-6
30.0
29.0
28.0
27.0
26.0 20 dB improvement
25.0
24.0
23.0
0 10 20 30 40
Wanted Signal to X-Pole Interference, dB (XPD)
Figures A4 to A8 below display various terminal and repeater configurations using the
RAC40 and XPIC.
CH1V
V
CH2V
CH1H
cable connections
Inter-RAC40 XPIC
CH2H
4xSTM1/OC3
Network Interface
V
CH2V
CH1H
H
CH2H
CH3V
CH1V
V V
CH4V
CH2V
CH3H
CH1H
H H
CH2H
CH4H
V
CH2AV
Main
Antenna
CH1AH
H
CH2AH
CH1BV
V
CH2BV
Diversity
Antenna
CH1BH
4xSTM1/OC3 H
CH2BH
Network Interface
Figure A7. Eclipse Quattro 256xE1/336xDS1 Space Diversity Terminal with XPIC,
4xSTM1/OC3 network interface
CH1AV
CH3AV
V V
CH2AV
CH4AV
CH1AH
CH3AH
H H
CH2AH
Main
CH4AH
Main Antenna
Antenna
CH1BV
CH3BV
V V
CH2BV
CH4BV
CH1BH
CH3BH
CH2BH
H
CH4BH
Diversity
Diversity 4xSTM1/OC3 Antenna
Antenna or 4x16xE1/DS1
Add & Drop
Figure A8. Eclipse Quattro 256xE1/336xDS1 Space Diversity Repeater with XPIC,
4xSTM1/OC3 network interface
With the RAC40 Eclipse Quattro will support CCDP operation with a minimum 28MHz
(27.5MHz at 18GHz) T-T separation between adjacent channels on the same
polarization, as shown below.
28MHz
V V V
H H H
28MHz
Adjacent Channel
Co-Channel
Alternate Polarization Adjacent Channel
Dual Polarization
(ACAP) Co Polarization
(CCDP)
(ACCP)
Four-Channel Arrangements
Compared to standard alternating channel arrangements, which would require a total
of 112 MHz of bandwidth to transmit 4 channels of STM-1 data, Eclipse Quattro is able
to compress the same amount of traffic into just 56 MHz of total bandwidth using
adjacent co-polar and co-channel dual polarization arrangements, as shown in Figure
B2.
28MHz
V V
H H
56MHz 28MHz
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© 2004 Stratex Networks. All rights reserved. Eclipse, Eclipse Quattro, Super-PDH, Concentric Rings, Portal and ProVision are
trademarks and/or marks of Stratex Networks, Inc. Eclipse ©2004; ProVision ©1998 - 2004. Product specifications are subject to
change anytime and without notice. The product details and features described herein are supplied for information purposes only,
and in no way imply or guarantee availability. Details of product features and functionality are subject to change without notice. This
material is provided for information purposes only. November 2004.
Please check with your local Stratex Networks sales representative or agent for current details of product availability and features.