Corning Optical Communication MA1K-IDEN-SMR RF Booster User Manual MobileAccess 2000

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Document Description	Users Manual Part 3
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Date Submitted	2006-06-09 00:00:00
Date Available	2006-06-09 00:00:00
Creation Date	2006-05-30 14:14:07
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Document Lastmod	2006-06-01 12:22:01
Document Title	MobileAccess 2000
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Document Author:	Mira Perez

MA 1000 Installation and Configuration Guide
3.3.8
DC Cable Length Design from Base Units to Remote Units
NOTE: Please refer to MOPS_091482_R1_Micrin_inbuilding System for more information.
A primary concern when installing lengths of wire is voltage drop. The amount of voltage lost
between the originating power supply and the device being powered can be significant.
Improper selection of wire gauge can lead to an unacceptable voltage drop at load end.
A DC cable manufacturers chart 1 can be used to design the proper cable size for the desired
length by calculating the voltage drop of a pair wire as a function of wire gauge and load
current.
To determine the Load Current for MobileAccess-1000 remote units, it is required to consider
the following when identifying the proper cable size (default specifications):
•
Remote unit power consumption: 75 Watts Maximum (includes 800 and 900 MHz and
1.9 MHz)
•
Remote unit operating voltage range:
•
MA 1000: -20 to –60 VDC
•
MA 1200: -25 to –60 VDC
NOTES:
1. A paired wire run represents the feed and return line to the load. For example, a500-foot
wire pair is equivalent to 1000 feet of total wire.
2. For all in-building systems always use PLENUM RATED DC cable.
3. For all purposes and precaution measures are calculations will use –26 VDC as the lower
range voltage for Remote Units.
Therefore, to calculate the Load Current we simply divide the maximum power consumption
specified for the remote unit over the minimum voltage required operating the Remote Unit (-21
VDC).
The Load Current calculated for each Remote Unit will be 2.38 amps.
Table 3-2. MobileAccess-1000 DC Cable Requirements
to Power Remotes Units from the PDU
Parameter
Minimum VDC @ Remote
Remote Power Consumption
Current Load @ Remote
Value
21
50
2.380952381
Units
VDC
Watts
Amps
Appendix B: Manufacturers Chart to Determine Cable Size for 1-pair of Plenum Rated Cable
31
MA 1000 Installation and Configuration Guide
Using this information and the table provided by the manufacturer, we can calculate the
maximum length allowable for the Remote Units for each size gauge of 1-pair of DC plenum
rated cable as illustrated in Table 3-3.
Table 3-3. Summary Table for Maximum Length Allowable for Remote Units for Each Gauge
MAX Distance from
Gauge
Remote PDU to Remote Price/Ft Total Cost
(AWG)
in Ft (1 pair)
MAX Distance from
Price/Ft Total Cost
Remote PDU to
Remote in Ft (2 pairs)
10
4400
$0.31
$1,364.00
8800
$0.31
$5,456.00
12
2750
$0.21
$574.75
5500
$0.21
$2,299.00
14
1750
$0.13
$232.75
3500
$0.13
$931.00
16
1100
$0.10
$113.30
2200
$0.10
$453.20
18
700
$0.07
$51.10
1400
$0.07
$204.40
20
425
$0.06
$26.54
850
$0.06
$106.17
22
275
$0.05
$13.61
550
$0.05
$54.45
24
250
$0.03
$7.75
500
$0.03
$31.00
Table 3-3 summarizes the maximum length allowable for the Remote Units for each size gauge
of 1-pair of DC plenum rated cable. The table also provides an average cost associated for 1
and 2 pair cable runs to the remote units from the PDU.
3.3.9
Circuit Breakers
Install fuse protections for the system according to the following criteria:
3.3.10
•
The following system elements require external fuse protection: RIUs, BUs, and
410/430 Controllers.
•
Referring to Table 3-1, calculate the required fuse protection.
•
Example: a set of three elements consisting of a BU, RIU and MA 410/430 controller
requires a 2A circuit breaker.
Power Supply Configurations
Two Power Supply configurations are usually in use for these applications:
•
Dedicated AC connections- each PS is located adjacent to the Hub and/or RHU unit
it will serve.
•
Central connection – a single DC power plant supplies the power for NMS, RIU and
all BUs , RHUs and the RF source.
32
MA 1000 Installation and Configuration Guide
3.3.11
Types of Power Supplies
MobileAccess will be powered based on the type of in building application:
1) EBTS Driven Configuration. In this configuration, existing Nextel approved power plants
shall be used to power both the MobileAccess equipment and Motorola EBTS equipment,
RFN MC Series IDEN Microcell (commonly know as Aztec), or BDA units..
2) 120/220 VAC. Can be used with separate PS to power the MobileAccess equipment and a
BDA. If there aren’t any power back-up requirements for the in-building solution.
NOTE: It is vital to Calculate the required power according to the requirements of the specific
installation and then determine the configuration of the power supplies and/or plant. Refer to
3.3.5 for power requirements for MobileAccess elements and use standard Nextel power
consumption requirements for the RF source being applied.
3.4
Installation Conventions
Some of the basic installation conventions are listed below for the MA 1000 system:
•
Base Units – are usually concentrated in the same location, most often in the main
communication room.
•
Remote Hub Units usually placed in the communication shaft or closet of a
corresponding floor so they can be easily located. Each RHU can typically cover a floor
of up to 30,000 sq ft.
•
One or two pair plenum rated source power cable – a one or two pair gauge
power cable run from the communication room through the building shaft. The power is
distributed to each remote unit using these power DC cables that provide power to the
individual RHUs on each floor.
•
Fiber optic cable - bundled fibers are terminated into the Base Units in the main
communication room. The fibers are then routed to each coverage location where
individual fibers terminate into splice boxes. The splice box couples the installed fiber
into the remote units. Enough spare fibers should be installed to take into account
future expansion of the system.
For example, for three remote units, six fibers are required. However, to allow for future
upgrades, it is recommended to install additional optic fibers to be connected to additional
RHUs.
33
MA 1000 Installation and Configuration Guide
The following figure illustrates fiber optic routing sufficient to cover 21 floors: each group of
strands can cover three floors as illustrated below, with two strands to spare. The first
group of strands coves floors 1, 2 and 3; the next group will cover floors 4, 5 and 6 through
an additional splice box.
Figure 3-1. Illustration of Fiber Optic Routing
•
For remote power supply configuration - cable bundles are routed from the main
communication room and individual wire pairs are terminated into the power feed of
individual units.
By providing power from a single distribution point, maintenance can be reduced and UPS
backup can be easily provided. The maximum distance from the source to the termination
spot is 1000 feet using 18 gauge wires.
In many locations local codes do not require power to be run through conduit if 100 watts
or less is used. Please consult the regulations in your local jurisdiction prior to deploying
remote power. When power cables require distances greater than 1000 feet 14 or 16
gauge wire may be used.
•
On each floor - the antennas are connected to the RHUs using coax cables.
34
MA 1000 Installation and Configuration Guide
System Installation
4.1
Overview
This chapter describes how the communication room and remote locations are installed. The
individual system elements are described in Chapter 2. In order to describe the installation
process clearly, it will be described as consisting of two logical parts:
A. Telecommunications room – installing the RIUs, BUs, MA 410/430
controllers, and the required passive equipment in the telecommunication room
close to the RF signal source. This installation may differ between single and multibuilding topologies.
B. Remote locations – RHU and Add-on installations and connections. These are
usually wall mounts.
The installations for two basic topologies are described in detail: for single building and for
multi-building. By understanding the two generic installations you will be able to address any
variations in system deployment.
NOTE: For installations that include the MA NMS: Once the installation has been
completed, it can be verified using the MCT application (NMS User’s Guide) and the devices
monitored using the NMS Manager (NMS User’s Guide).
4.2
Communication Room Installation
4.2.1
Rack Installation Safety Instructions
Review the following guidelines to help ensure your safety and protect the equipment from
damage during the installation.
•
Only trained and qualified personnel should be allowed to install or replace this
equipment.
•
Verify that ambient temperature of the environment does not exceed 50°C (122°F)
•
To maintain a low center of gravity, ensure that heavier equipment is installed near the
bottom of the rack and load the rack from the bottom to the top.
35
MA 1000 Installation and Configuration Guide
4.2.2
•
Ensure that adequate airflow and ventilation within the rack and around the installed
components so that the safety of the equipment is not compromised. It is
recommended to allow for at least about 2 cm of airspace between devices in the rack.
•
Verify that the equipment is grounded as required – especially the supply connections.
Rack Installation Procedure (Motorola Controller Rack)
It is recommended to install the following MobileAccess system modules in the Motorola
Controller 19” rack (usually in the communication room):
NOTE:
For
more
information
on
configuration
MOPS_091482_R1_Micrin_inbuilding System.doc
rack
layout
refer
to
•
RIU 3U
•
BU 1U
•
MobileAccess 410/430 controller 1U
•
Power Distribution Units (Micrin 6-Channel and 8 Channel PDU units – for more
information refer to MOPS 091482 R1 Micrin in building System. Motorola ISC, EAS and
CSU units 1U each.
•
RF Interface panel (Weinchel Panel – for
MOPS_092265_R1_Weinschel_Inbuilding System)
more
information
refer
to
Note: Verify that the rack height can support all the units to be installed, where you may also
want to consider future expansions.
36
MA 1000 Installation and Configuration Guide
The following image describes shows the recommended locations of the MobileAccess elements
in the rack in order to facilitate and simplify the cabling connections. Note that the
MobileAccess 410/430 controller is at eye level to provide an easy view of the LED
indicators and LCD display and easy access to the local and remote monitoring connections.
DC Wiring Standard for a CNTL Rack EBTS Driven
System
48 VDC
Source
From Power
Plant (10 Amp
DC Breaker)
Motorola Breaker Panel - 2U
Main DAS PDU - 1U (6-Channel PDU - Micrin)
Radio Interface Unit
MobileAccess - 3U
Base Unit #1 MobileAccess - 1U
Remote DAS PDU #1 - 1U (8 Channel PDU - Micrin)
48 VDC
Source
From Power
Plant (20 Amp
DC Braker/
Remote PDU)
Base Unit #2 MobileAccess - 1U
Remote DAS PDU #2 - 1U (8 Channel PDU - Micrin)
Base Unit #3 MobileAccess - 1U
Remote DAS PDU #3 - 1U (8 Channel PDU - Micrin)
NMS MobileAccess - 1U
EAS - 1U
CSU - 1U
ISC3 - 1U
48 VDC
Source
From Power
Plant (20 Amp
DC Braker/
Remote PDU)
ISC3 - 1U
Base Unit #4 MobileAccess - 1U
Remote DAS PDU #4 - 1U (8 Channel PDU - Micrin)
Figure 4-1: Recommended Order In Motorola Controller Rack
37
To Remote Units
Using Plenum
Rated 2-pair DC
Cable
MA 1000 Installation and Configuration Guide
4.2.3
Single Building Rack Installation
This section provides an example of a single building main communication room installation
for a 24-floor building with Cellular and PCS coverage.
Since there are 24 floors, then 24 MA RHUs are required – one for each floor. In addition, the
following equipment will be installed in the main communication room:
•
Three BUs – to support 24 RHUS
•
One MA 430 controller for monitoring
•
One RIU with Cellular and PCS BTSCs – to interface to the BTS/BDA
Figure 4-2. Example of Single-building Topology Communication Room Installation
38
MA 1000 Installation and Configuration Guide
4.2.4
Multi-Building Rack Installation
Figure 4-3 provides an example of a multi-building solution which distributes two bands over a
main site and two remote sites. Each site consists of an 8-floor building, requiring 8 RHUS per
building (one on each floor).
The following equipment is required in the main communication room of each building:
•
One BU – each BU distributes a high-band and low-band signal from a dedicated
operator to eight RHUs (housed in eight separate RCs – one on each floor).
•
One MA 430 controller configured as Master in the Main building, and two MA 410
controllers configured as slaves in the Remote buildings.
•
MA 300 Main in the main building, and MA 300 Slave in each of the remote buildings.
The MA 300 units extend the RF signal from the Main to the Remote buildings over a single
strand of fiber. Uplink and downlink signal are placed on the single fiber at 1310 and 1550
respectively.
Figure 4-3. Example of Multi-building Topology Communication Room Installation
39
MA 1000 Installation and Configuration Guide
4.2.5
RIU Connections
The rear-panel provides all the connections on the BTS side and on the BU side as well as
connections to the MobileAccess 410/430 controller and the power connection. Two types of
BTS side connections are available for each BTS conditioner: simplex and duplex.
ATTENTION
4.2.5.1
1.
The RIU is factory set to 8dB gain on the uplink and 0 dB gain
in the downlink. In order to operate properly, an ADJUSTMENT
process is required in the field.
2.
Any unused input and output connectors MUST be terminated
with 50 ohms – otherwise the ADJUSMENT procedure results
may be affected.
Basic Connections
Connect each BU to the corresponding RF Uplink and Downlink connectors on the RIU rear
panel. Note that one uplink and one downlink RIU rear-panel ports are used to connect one
OPTM (four ports from the BU); two uplink and two downlink ports are used to connect an 8port BU (two OPTMs).
BTS/BDA simplex
connections
MobileAccess 1000 BU
connections (pair per BU)
BTS/BDA duplex
connections
Power
Controller connection
Figure 4-4. RIU Rear Panel showing the RF Connection
40
MA 1000 Installation and Configuration Guide
Each RIU can be connected to four 8-port Base Units (real panel connections) or eight 4-port
Base Units. The RIU can be expanded to support additional BU by using splitters and
combiners connected to the front panel connectors.
Note: All connections are via RG223 coax cables with 1/2" N-type male connectors
1. Connect each BTS/BDA to the corresponding rear panel BTSC connectors.
For each BTSC connection, both simplex and duplex connections are
available:
•
For a duplex connection, connect to the BTSC DUP port;
•
For a simplex connection, connect to the BTSC UL and DL ports;
2. Connect the Power connections on the RIU rear panel.
3. If your system includes a MA 410/430 controller, connect the RS485 port on the RIU rear
panel to the controller.
4.2.5.2
Connections to Additional BUs
To connect more than four 8-port BUs or more than eight 4-port BUs to the RIU, Connect an
8W splitter to the Downlink connector on the RIU front panel and an 8W combiner to the
Uplink connector on the RIU front panel and connect additional BUs to the uplink and downlink
connections.
BTSC
BTSC
Combiners
/Splitters
Compartment*
UL and DL
connections to
four BU8 modules
BTSC
Expansion ports
UL and DL connections
to up to four additional
BU8 modules
External 1:8 splitter
/combiner
41
MA 1000 Installation and Configuration Guide
4.2.6
BU Connections
NOTE: It is assumed that the patch panel cabinet (SC/APC adaptors) for fiber optic cable
connections is installed in the rack near the BUs.
1. Connect (3/125/900) pigtail with SC/APC connectors between splice tray
and patch panel cabinet.
2. Connect (3/125/3000) SC/APC jumpers between the corresponding BU and patch panel.
3. Connect the fiber optic cables from the BU to the RHUs through the patch panel cabinet.
4. Connect the UL RF Output and DL RF Input connectors to the RIU or UL and DL
connectors or to the passive interface (such as Interface Box) in topologies that do not
include RIUs.
4.2.7
Controller Connections
Refer to the MobileAccess NMS 410/430 Installation and Configuration Guide for connections.
42
MA 1000 Installation and Configuration Guide
4.3
Remote Site Installation
4.3.1
RHU 1000 Installation
Mount and install each RHU on the wall in the communication shaft or communication room.
4.3.1.1
Wall Mount
RHU 1000 is usually mounted on a wall in a clean indoor environment – RF ports facing
down.
Assembly instructions
1. Place the unit against the wall and mark the four holes to be drilled in the wall.
2. Drill four holes 8mm in diameter and insert the appropriate sized plastic plugs in each hole.
3. Secure the RHU 1000 to the wall using four screws, 4.5mm diameter, 40 mm long.
Figure 4-5. RHU 1000 Wall Mount
43
MA 1000 Installation and Configuration Guide
4.3.1.2
Connections
NOTE: Keep in mind the rules for handling and connecting F/O cables. The F/O cables will be
connected to the associated BU in the communication room at a later phase.
1. Connect fiber optic cable to splice box and to SC/APC pigtails to RHU
2. For the downlink, connect the fiber optic cable pigtails from splice box coming from the
BU port to the corresponding RHU port.
3. Connect the RHU to antennas according to the RF engineers design (up to 4 antennas
per RHU).
4. For the uplink, connect the fiber optic cable pigtails from splice box from the RHU to the
uplink port that connects to the BU.
5. Connect the power to each RHU according to power design planning.
6. Verify that 50 ohm terminators are placed on the unused uplink and downlink connectors.
4.3.2
MA 1200 Add-on Installation
4.3.2.1
Assembly and Connections
Refer to Figure 4-6.
ATTENTION
To prevent damaging the SMA connectors,
be sure to tighten using a torque of 8lb.
1. Referring to the following figures, assemble the RHU 1000 to the MA 1200 as follows:
•
Position the supplied bracket on the RHU 1000 and secure the bracket to the RHU
1000 using the four supplied 6-32 NC screws.
•
Position the RHU 1200 unit on the bracket and secure the RHU 1200 to the bracket
using the four supplied 8-32 screws.
44
MA 1000 Installation and Configuration Guide
Figure 4-6. Add-on 1200 to RHU 1000 Assembly
Figure 4-7. Add-on 1200 to RHU 1000 Completed Assembly
45
MA 1000 Installation and Configuration Guide
2. Connect to the RHU 1000 rear panel ports as follows:
•
Interconnect the UL, DL and High-band SMA ports of the RHU 1000 and RHU 1200.
•
Connect the MA 1200 add-on Control From connector to the RHU 1000 Control
connector using the supplied flat-cable.
Figure 4-8. Add-on 1200 to RHU 1000 Connections
3. Connect the power to the RHU 1200 front-panel DC connector.
46
MA 1000 Installation and Configuration Guide
4.3.3
RHU 800/900 Connections
NOTE: In order to supply antenna alarms, the antenna must provide a DC resistance of up to
5K ohms.
This section describes the installation procedure for the bracket assembly.
For installations without cavity filters
If the SMR900 IMD blocker on the uplink is not required, then the external cavity filter kit
(1000-SMR-FILTER) is not utilized in the installation.
In installations without a cavity filter, connect a jumper to the rear panel of the RHU. The
installation procedure is the same as the RHU 1000 installation (section 4.3.1)
Jumper
Figure 4-9. RHU 800/900 Model Without Filter
47
MA 1000 Installation and Configuration Guide
Installations with cavity filters
The required connections to the filter are implemented at the rear of the assembly as illustrated
below. Additional connections are provided for connection to MA 1200 CELL/1900 add-on unit
(refer to section 4.3.4).
Figure 4-10. Rear View of RHU 800/900 with Filter
4.3.3.1
Wall Mount
RHU 800/900 is usually mounted on a wall in a clean indoor environment – RF ports facing
down.
Assembly instructions
1. Place the unit against the wall and mark the four bracket holes to be drilled in the wall.
2. Drill four holes 8mm in diameter and insert the appropriate sized plastic plugs in each hole.
3. Secure the RHU 800/900 assembly to the wall using four screws, 4.5mm diameter, 40mm
long.
4.3.3.2
Connections
1. Install splice box near RHU.
2. Connect fiber optic cable to splice box and to SC/APC pigtails to RHU
3. For the downlink, connect the fiber optic cable pigtails from splice box coming
from the Base Unit port to the corresponding RHU port.
4. Connect the RHU antennas according to the RF engineers design. (Up to 4
antennas per RHU).
48
MA 1000 Installation and Configuration Guide
5. For the uplink, connect the fiber optic cable pigtails from splice box from the
RHU to the uplink port that connects to the BU.
6. Connect the power to each RHU according to power design planning (local or
remote power supply).
7. Verify that 50 ohm terminators are placed on the unused uplink and downlink
connectors.
4.3.4
MA 800/900 Connections to MA 1200 Cell/1900 Add-on
An additional band (CELL/1900) can be added to MA 800/900 installations by connecting the MA
1200 CELL 1900 add-on unit to the MA 800/900 RHU.
RHU 1200 add-on is simply assembled on top of the RHU 800/900 using the supplied plate,
and the control ports and RF signal ports for each band are interconnected. The signals are
distributed through the RFU 800/900 antenna connections.
The add-on unit does not require any additional RF or optic infrastructure since all signals are
received through the RHU 800/900 unit to which the add-on is assembled.
Add-on
RHU 800/900
Plate
Antenna connections
(four)
Figure 4-11. RHU 800/900 and CELL 1900 Add-on Front View
Referring to Figure 4-13, assemble the add-on unit to the Rhu 800/900 as follows:
1. Position the supplied plate on the RHU 800/900 and secure it to the RHU 800/900
using the four supplied 6-32 NC screws.
49
MA 1000 Installation and Configuration Guide
2. Position the RHU 1200 unit on the plate and secure the RHU 1200 to the plate using
the four supplied 8-32 screws.
3. Referring to the following figure, connect the add-on connections:
ATTENTION: To prevent damaging the SMA connectors,
be sure to tighten the connection using a torque of 8lb.
•
Interconnect the RHU 800/900 and RHU 1200 SMA Uplink, Downlink and High
connectors on the rear panels of both units using the three straight jumpers.
•
Interconnect the RHU 800/900 and RHU 1200 D-type 9-pin connectors on the rear
panels of both units using the supplied flat-cable.
Figure 4-12. Connections to MA 1200 add-on
The following figure illustrates the rear panel connections to the add-on and filter.
Figure 4-13. RHU 800/900 and CELL 1900 Add-on Rear View
4. Connect the power to the RHU 1200 front-panel DC connector.
50
MA 1000 Installation and Configuration Guide
4.3.5
4.4
Antenna Connections
•
For systems without MA 850 modules - connect the antenna connections to the RHU
antenna ports;
•
For systems with MA 850 modules - refer to the MA 850 Installation and Configuration
Guide and connect the antenna ports to the MA 850.
Power Distribution Units
NOTE:
For
more
information
refer
MOPS_091482_R1_Micrin_inbuilding System document.
to
Nextel
Communications
The Micrin Power Distribution Units were designed specifically to be integrated into the
MobileAccess system. The units provide access to up to –48 VDC power to all of MobileAccess1000 units from a central DC power source, as well as access to a – 48 V DC battery back-up
systems from our standard approved power plant configurations.
Two Power Distribution Units are available: a 6-channel PDU (Main PDU) and an 8-channel PDU
(Remote PDU.)
•
Main PDU unit - provides DC power to MobileAccess-1000 host units that are located
in a 19-inch wide rack (i.e. Base Units (BU), Network Manger System (NMS) and the
Radio Interface Unit (RIU)).
•
The Remote PDU units - functions as a centralized DC power source to supply DC
power to all MobileAccess-1000 remote units. Each Remote PDU can provide power to
up to 8 remotes. Each remote unit powered by the Remote PDU will be protected by a
dedicated circuit breaker corresponding to the power consumption of each remote unit
(3A).
Power to the remote units can be provided either through separate copper cables or mixed
bundled fiber-copper cables. To guarantee safety to our in-building customers, the PDU is
UL approved to meet NEC Class 2 power source requirements for centralized DC power
systems.
Each PDU unit requires a dedicated DC breaker. For a full size one sector MobileAccess-1000
system, four breakers are required. Sizes and alternatives will be discussed in the following
section.
The PDU units rear panel input and output connections have been designed to optimize cable
layout to the MobileAccess-1000 system and from the power plant. Labels to the breakers in
front will make it easy to manage, maintain and operate the in-building system.
51
MA 1000 Installation and Configuration Guide
PDU Main Features:
4.4.1
•
19-inch sub-rack design
•
1 rack unit
•
Short circuit protection to all units
•
DC remote centralized power
PDU Part Description:
Main Power Source
Input from Power
plant (-48 VDC)
Short-circuit breaker
switch protection for
each Remote Unit
Supply Outputs to Remote
Units (-48 VDC)
NC Alarm
Outputs
Figure 4-14: Micrin MTC2931 8-channel PDU (Remote PDU)
Short-circuit breaker
switch protection for
each Hub Unit
Main Power Source
Input from Power
plant (-48 VDC)
Supply Outputs to
Hub Units (-48 VDC)
Figure 4-15: Micrin MTC2980 6-channel PDU (Main PDU)
52
NC Alarm
Outputs
MA 1000 Installation and Configuration Guide
4.4.2
PDU Specifications:
Figure 4-16: Micrin MTC2931 8-channel PDU Specs (Remote PDU)
Figure 4-17: Micrin MTC2980 6-channel PDU Specs (Main PDU)
53
MA 1000 Installation and Configuration Guide
4.4.3
Block Diagram:
Figure 4-18: PDU MobileAccess-1000 DC Centralized Power Solution Block Diagram
Figure 4-18 illustrates a typical DC power wiring solution for MobileAccess-1000. The solution
provides DC power to all MobileAccess-1000 main host elements (i.e. BU, NMS and RIU) and up
to 8 remote units for a one-sector configuration. Individual breakers from the main power plant
distribution panel will power each PDU.
The breakers required for each PDU unit are:
•
Main PDU – 10 A DC breaker
•
Remote PDU – For each PDU a 20 amps DC breaker is required for a maximum of four
PDU units per MobileAccess-1000 system; for a full MobileAccess-1000 that includes 32
Remote Units, four 20 amps DC Breakers are required.
NOTES:
For those power plants with limited number of breaker positions, if cascading power inputs to
the PDU units ensure that you size the proper breaker and the DC cable(s) from the power plant
to the PDU units.
Recommended: use standard 6 AWG DC Cable size between the power plant and PDU.
54
MA 1000 Installation and Configuration Guide
The Main PDU will provide power to one RIU, one NMS and up to four BU. The Breaker positions
for the Main PDU are shown in the table below and are shown in the unit label. DC and GND
cables, terminals and adapters to power MobileAccess-1000 system are included as part of the
Main PDU.
Table 4-1. Main PDU Breaker Positions
Main DAS PDU (Micrin 6-Channel PDU)
Breaker
Breaker Size
Description
CB1
3A
NMS
CB2
3A
RIU
CB3
3A
BU #1
CB4
3A
BU #2
CB5
3A
BU #3
CB6
3A
BU #4
The Remote PDU will provide power to up to 8 remote units. The breaker positions for the
Remote PDU are shown in the table below and are labeled in the unit.
Table 4-2. Remote PDU Breaker Positions
REMOTE DAS PDU (Micrin 8-Channel
PDU)
Breaker Breaker Size
Description
CB1
3A
Remote Unit #1
CB2
3A
Remote Unit #2
CB3
3A
Remote Unit #3
CB4
3A
Remote Unit #4
CB5
3A
Remote Unit #5
CB6
3A
Remote Unit #6
CB7
3A
Remote Unit #7
CB8
3A
Remote Unit #8
NOTES:
Required Materials not included in the PDU units for DC wiring:
1. 6 AWG DC cable and terminals (between power plant and PDU)
2. DC cable between PDU and Remotes (Plenum Rated 1 or 2 pair cable).
4.4.4
Universal RF panel
NOTE:
For
more
information
refer
to
MOPS_092265_R1_Weinschel_Inbuilding System document.
55
Nextel
Communications
MA 1000 Installation and Configuration Guide
The Weinschel Universal RF Interface Panel (Item Master Number 25025) is an essential
element for a DAS system when used with either the Motorola Enhanced Base and Transceiver
Station (EBTS), or RFN MC Series IDEN Microcell (commonly know as Aztec.) The RF Panel is
designed to provide the appropriate RF signal levels between the RF IDEN source and any
Nextel Approved DAS system.
This panel provides two main functions as illustrated in Figure 4-19:
1. Forward Path Attenuation and Combining
2. Reverse Path Attenuation
To Duplexer
Rx1 & Rx2
From DAS
Rx1 & Rx2
Variable
Attenuators
30 dB/1 Step
dB
2:1
Rx2
Variable
Attenuators
70 dB/1 Step
dB
Rx1
Tx
From Combined BRs
Primary & Expansion
Tx Duplexer
Figure 4-19 – Universal RF Panel – RF Signal Flow (RF IDEN Source to a DAS System)
The “From combined BRs primary and expansion” on the EBTS side are the Motorola base
radios. The base radios are combined using a dual Motorola 3:1 and a Triple 2:1 combiner
(Renaissance Triple 2X1 Combiner - Item Master Number 24660 or KDI Triple 2X1
Combiner – Item Master 24462 2, which are involved in the forward path because base
radio outputs are combined before they enter the DAS system. A Standard Nextel Forward Path
Combining Configuration is depicted in Figure 4-19 for four Legacy and two Quad (4 carriers) in
one RF rack configuration.
NOTE: Do NOT combine signals with multiple carriers through a hybrid combiner that
employees an isolator input device. These devices WILL create IM products when fed with
multiple frequencies. The Renaissance and KDI products referenced above DO NOT have
isolator inputs.
Renaissance Electronics Model 9A2NAT(IM#24460) and KDI Model AY-H88S(IM#24462)
56
MA 1000 Installation and Configuration Guide
As illustrated in Figure 4-19, the RF panel is used to combine Legacy and Quad base radios.
Each Legacy base radio provides one bi-directional RF channel and each Quad base radio
provides up to four bi-directional RF channels in this configuration. Because Legacy and Quad
base radios have different power level outputs, it is important that all base radios of a given
types shall have same power level regardless of location (main or expansion rack) with
minimum output power. Figure 4-19 depicts the proper power level settings for all the base
radios when combined using this standard.
Power setting used in this configuration:
•
Legacy’s – 5 watts/carrier
•
Quad’s – 1.3 watts/carrier (four carriers)
Another approach would be to maintain the same power levels regardless of type of base
radio and number of carriers in the Quad base radios (either Quad or Legacy) at 5 watts.
To do so, it is required to place a 6 dB –25 watt pad between the first and the second 2:1
combiner in the triple 2:1 combiner (Renaissance Triple 2X1 Combiner - Item Master
Number 24660 or KDI Triple 2X1 Combiner – Item Master 24462). The pad will
balance the power level/carrier(s) in the Quad (set at 5 watts/carrier(s)) with
the Legacy base radio when set at 5 watts. Figure 4-19 illustrates the exact location of this
pad. 3
The “From DAS Rx1 & Rx2” are the diversities receive from the DAS system. The reverse paths
are then attenuated prior to Motorola Duplexers “To duplexer R1 & R2.” Attenuation is required
on the reverse paths to attenuate the additional uplink gain provided by the DAS system. This is
done to maintain the standard RFDS gain (the gain from DAS remote unit antenna port to Base
Radio antenna port will always be 10 dB). The standard reverse path configuration for a DAS
system is shown in Figure 4-19.
NOTE: In order to increasing the overall gain to improve base radio receive sensitivity, it is
required to modify the standard handover uplink inter-cell floor and downlink handover C/I ratio
setting parameters (non-standard setup.)
Weinschel 6 dB- 25 Watt attenuator in Appendix
57
5
Appendix I: Optical Test
Procedures
5.1
General
Two parameters are of prime importance when testing optical cables or jumpers for use with
Mobile Access products:
•
Optical Loss – the difference between the optical power at the input and output of an
optical cable. It must be measured (usually in dB units) at 1310 nm. The maximum
allowable loss should be < 0.5 dB/km for Single Mode (SM) cables and < 0.5 dB for
every mated pair of connectors.
•
Optical Backreflection – the percentage of light backreflected from the fiber input
(dB units). The maximum allowable backreflection should be < –55 dB for all jumper
cables.
The methods to test these parameters will be described below.
5.2
Optical Loss Testing
This section describes the optical loss testing of a Single Mode Cable with SC/APC connectors
at each end.
5.2.1
Required Test Equipment
•
1310 nm Stabilized Laser Source
•
1310 nm Optical Power Meter
•
Two Fiber Optic Test Jumpers with SC/APC connectors at each end
•
Two SC/APC Adapters
58
MA 1000 Installation and Configuration Guide
5.2.2
Test Procedure
1. Set up the Laser Source, Optical Power Meter, and Test Jumper as shown below.
Figure 5-1. Set Up
2. Record reading as P1 in dBm units.
3. Serially connect the second Test Jumper as shown below.
Figure 5-2. Serial Connection of Second Jumper
4. Record the Power Meter Reading as P2 in dBm units.
5. Calculate Loss L12 according to the equation: L12 = P1 - P2
6. If L12 is lower than 0.5 dB continue to Step-7; otherwise replace these test cables and
repeat from Step-1.
59
MA 1000 Installation and Configuration Guide
7. Disconnect connectors B and C. Connect the Cable Under Test (CUT)
between connector B and C as shown below.
Figure 5-3. Connecting CUT
8. Record Power Meter reading as Pcut in dBm units.
9. Calculate Cable Loss Ldut from the equation Lcut = P2- Pcut.
10. The maximum allowable loss should be < 0.5 dB/km for SM cables and < 0.5 dB for every
mated pair of connectors.
5.2.3
Example
Testing a 50 meter cable with SC/APC connectors at each end.
•
P1 = -1dBm
•
P2 = -1.5dBm
•
L12= P1 – P2 = -1dBm - (-1.5) = 0.5 dB
Conclusion: the test cables are of sufficient quality to continue testing.
•
Pcut = -2dBm
•
Lcut = P2 - Pcut= -1.5dBm - (-2dBm) = 0.5 dB
This is acceptable since a mated connector pair was added along with the CUT and a loss of
-0.5 dB is allowed for every mated pair of connectors.
60
MA 1000 Installation and Configuration Guide
5.3
Optical Back-reflection Testing
This section describes the optical back-reflection testing of SM SC/APC connectors at each
end of an optical cable.
5.3.1
Required Test Equipment
1. Adjustable1310 nm Stabilized Laser Source with output power greater than
7dBm.
2. 1310 nm Optical Power Meter with a measurement range of up to -70
dBm.
3. One low loss Singlemode 1310 nm 2x2 50%/50% Fiber Optic Coupler with
SC/APC connectors at all four fiber pigtailed ports. Pigtail length should be
50 cm.
4. One SC/APC Adapter
5.3.2
Test Procedure
1. Refer to the following figure for port definitions of the Fiber Optic Coupler.
The coupler is symmetrical but for our purposes, each port should be
identified as shown in Figure 1-4.
Figure 5-4. Port Identification
2. Measure the loss from port I1 to O1 according to the insertion loss
method described in the previous section. This loss will be referred to as
LI1O1. It should be approximately 3.5 dB.
3. Measure the loss from port O1 to I2 in a similar manner. This loss will be
referred to as LO1I2. It should also be approximately 3.5 dB.
4. Calculate Total Loss, TL where TL= LI1O1 + LO1I2. TL should
approximately 7dB.
5. Adjust the laser output power in dBm to the same value as TL.
For example, if TL = 7dB, adjust the laser output to 7 dBm.
61
MA 1000 Installation and Configuration Guide
6. Connect the laser to port I1 of the coupler as shown in Figure 5-5.
Figure 5-5. Test Procedure Connections
7. Connect the Power Meter to port I2 of the coupler as shown in Figure 5-5.
8. Wrap the O2 pigtail around a pencil of diameter 7 to 8 mm as illustrated.
9. The power meter readings should be < –58 dBm; otherwise, clean
connector O1 and measure again.
10. Connect the cable under test to connector O1.
11. Record Power Meter Reading as Backreflection, BRcut, of the cable under
test. The power is measured in dBm units. This is the same value as the
backreflection.
For example, if the power meter shows –58 dBm, the backreflection is –58 dB. The
maximum backreflection from the SC/APC connectors should be < –57 dB.
Long cables will have a higher BR since the cable itself reflects a small amount of light. This
small amount can grow to a considerable amount over a long length of fiber. To factor out this
cable backreflection, perform a mandrel wrap on the cable adjacent to the connector under test
and perform all measurements with the mandrel wrap.
62

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