Westell AWC?TMAV?850?FB User manual

Section AWC‐TMV‐850‐301
R
Equipment Issue 1
030‐300302 Rev A, December 2013
Copyright 2013 Westell, Inc. All rights reserved.
1312I1RA Page 1 of 6
‐ Installation Guide ‐
WestellAWC‐TMAV‐850‐FB Tower Mounted Amplifier
1. GENERAL
1.1 Document Purpose
This document provides installation and specification information
on Westell's AWC‐TMAV‐850‐FB 850 MHz Full Band Tower
Mounted Amplifier (TMA). A Westell AWC‐TMAV‐850‐FB
TMA is shown in Figure 1. See Table 1 for ordering information.
1.2 Document Status
Whenever this document is updated, the reason will be stated in
this paragraph.
‐ NOTE ‐
Hereafter, the AWC‐TMAV‐850‐FB Tower Mounted Amplifier may
be referred to as the “TMA.”
1.3 Product Purpose & Description
Westell's TMA's are costeffective tools to extend cell site cover
age and improve cell site capacity by conditioning and
amplifying the user‐endpoint uplink signal in an LTE radio ac
cess network. Westell's TMAs can be used in any application
which requires improved receiver sensitivity of the BTS/eN
odeB.
1.4 Product Mounting Location
The TMA is typically installed on a cell tower, close to the an
tenna. See Paragraph 3.4 for mounting steps and Figure 6 for
dimensions.
1.5 Product Features
Features of the TMA are shown in the following list.
SAdvanced, balanced LNA design with variable gain capability
SLow noise figure, return loss, and bypass insertion loss
SCompact size
SHeavy‐duty top and bottom mounting brackets with various
mounting holes to accept mounting bolts/screws and
mounting straps or bands
STwo, female, 7/16 DIN connectors at the bottom of the unit;
one for antenna connection and one for BTS
SWeather rating of IP67 (temperature range of ‐40_to +65_C)
2FUNCTIONALDESCRIPTION
The TMA includes the following functional blocks, as shown in
Figure 2.
2.1 Control, Bias & Alarm Electronics
This block includes the control processor, AISG modem, and
lightning protection.
Figure 1. Tower Mounted Amplifier (TMA) Unit
Front View Rear View
2.2 PreLNA Rx BPF
This is the preLNA (Low Noise Amplifier) band pass filter.
This filter conditions the uplink signal from the antenna before
the LNA.
2.3 Balanced Low Noise Amplifier
This is the amplifier of the TMA and includes the bypass cir
cuitry.
2.4 PostLNA Rx BPF
This is the postLNA band pass filter. This filter conditions the
uplink signal to the eNodeB.
2.5 Tx BPF
This is the transmit band pass filter. This filter conditions the du
plexed downlink signal from the eNodeB to the antenna.
BTSANTENNA Tx BPF
Pre-LNA Rx BPF
−
Bias-T
RF Bypass
& Switches
Control, Bias &
Alarm Electronics
Lightning
Protection
Balanced Low
Noise Amplifier
Post-LNA
Rx BPF
Figure 2. Block Diagram

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Figure 3. Bottom View Showing Connectors
7/16 DIN connector
Verify connectors are free of debris
Remove caps
Mount TMA so connectors face down
Weatherize connections after connecting cables
When installing:
Female
‐ CAUTION ‐
Improper grounding could be service affecting and cause service
interruptions.
‐ INSPECTION NOTE ‐
Visually inspect the product for damages prior to installation. If
damaged in transit, immediately report the damage to the transporta
tion company and to Westell.
‐ CAUTION ‐
Do not apply power until all connections are complete.
‐ CAUTION ‐
Risk of electric shock. Differential voltages of up to 260V can exist
on telecommunications lines.
CAUTION ‐ STATIC‐SENSITIVE
This product contains static‐sensitive components! Proper
electrostatic discharge procedures must be followed to maintain
personal and equipment safety. Do not store units near magnetic,
electromagnetic or electrostatic fields. Always store or ship units in
the original static‐protective packaging from Westell. Use anti‐static
mats when working on units.
3 INSTALLATION
3.1 Determine Power Options
The AWCTMAV850FB is powered by applying DC voltage to
the center pin of the 7/16 DIN connector labeled BTS. There are
several options for providing the power:
SeNodeB
SWestell Power Distribution Unit (e.g., AWCPDU6)
SWestell Rack‐Mount AISG Controller A99AISGRM3
SWestell's A99AISGCNTRLA portable AISG controller
kit to power the TMA for running AISG commands
Westell PDU's and AISG controllers supply the DC voltage to
power the TMA via Westell's Current Injector Modem (CIM).
The CIM injects the DC voltage onto the center pin of its 7/16
DIN connector labeled BTS. To power the TMA, the CIM can
be connected to the TMA or can be connected via an RF jumper
cable. For deployments where the eNodeB provides power, a
CIM is not needed as power is injected onto the center pin of the
RF cable leading to the TMA directly by the eNodeB.
3.2 Verifying Functionality Prior to Mounting
Prior to mounting the TMA on the tower, verify proper opera
tion of the unit by following the steps listed in either Paragraph
3.2.1, 3.2.2, or 3.2.3 below, depending on the powering method.
3.2.1 Powered from the PDU using a CIM
When power is from the Power Distribution Unit (PDU, such as
a Westell AWC‐PDU‐6) using a Current Injector Modem (CIM,
such as the Westell AWC‐CIM+R), follow the steps below.
1. Connect the connector labeled `ANT' of the CIM to the
connector labeled `BTS' on the TMA. Note that depending
on the model of CIM used, an adapter may be required.
2. Connect the AISG connector of the CIM power cable to the
CIM. Connect the other end of the CIM power cable to PDU.
3. Connect PDU power cable to appropriate power source as
indicated in the PDU installation documentation.
4. Check TMA functionality by observing the LED's on the
PDU. A red LED indicates the TMA is in alarm.
5. If the TMA is in alarm, verify all connections. If all connec
tions are correct, replace TMA.
3.2.2 Powered from a Westell AISG Controller using CIM
When power is from an AISG Controller (such as a Westell
AISG‐RM3 controller or an AISG‐CNTRL‐A controller kit),
follow the steps below.
1. Connect the connector labeled `ANT' of the CIM to the
connector labeled `BTS' on the TMA. Note that depending
on the model of CIM used, an adapter may be required.
2. Using an AISG cable provided with the AISG controller,
connect the cable to the male AISG connector on the CIM.
Connect the other end of the AISG cable to the AISG con
troller.
3. Using the AISG controller software, verify that the TMA is
operational and that no alarms are present.
4. If alarms are present, verify all connections. If all connec
tions are correct, replace TMA.
3.2.3 Powered from an eNodeB without CIM
Verification of the TMA operation when used with an eNodeB
as the power source is beyond the scope of this document. The
basic steps are shown below:
1. Connect the connector labeled `BTS' on the TMA to the
eNodeB.
2. Power up the TMA using the eNodeB command line inter
face.
3. Check for alarms using the eNodeB command line inter
face.

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4. If alarms are present, verify all connections. If all connec
tions are correct, replace TMA.
3.3 Determining the Final Installation Location
The exact location of the TMA will vary by installation; it is typic
ally pole mounted outdoors though it may be wall‐mounted. The
TMA can be located close to the antenna on the tower, or closer
to the BTS/eNodeB. The TMA can be mounted with mounting
screws/bolts inserted through the small round mounting holes
(see Figure 6 for dimensions) or with pole mounting straps
routed through the larger, square, cut‐out holes in the mounting
brackets.
Because the current to drive the TMA must pass from the CIM
to the TMA there cannot be a discontinuity in the DC path
between the CIM and associated TMA (such as a shorted
quarter wave lightning protection device).
3.4 Mounting the TMA
Mount the TMA per company practice or the steps below and
using Figure 4 as a guideline. The TMA may be pole (tower) or
wall mounted, using bolts/screws or straps. The mounting and
hardware surface must be capable of supporting the weight of
the TMA and be weather‐resistant and suitable for extended
outdoor use. The correct orientation of the TMA is with the con
nectors pointing down. Use Figure 5 as a reference as needed.
‐ VERIFYING FUNCTIONALITY NOTE ‐
Follow the steps in Paragraph 3.2 to verify proper functionality prior to
mounting the unit.
3.4.1 Mounting the TMA to a Wall
The TMA may be mounted to a wall, for example, such as when
mounting on a rooftop. In this case the screw holes on the
mounting plate can be used. Screws are not supplied. The
mounting of the TMA to a wall will vary by situation so only the
installer can decide the details of the mounting. However, par
ticular attention to grounding will be required as the wall itself
will not provide an adequate ground connection.
3.4.2 Mounting the TMA to a Pole
Follow the steps below to mount the TMA to a pole, as shown
in Figure 4.
1. Gather tools and equipment. The following tools may be
needed to mount the kit.
jStandard installation tools and hardware including
wrenches, screwdrivers, power drill and bits, and cable
ties, per company practice and mounting surface type
jGrounding wire, and other grounding tools and materials,
per company practice
j7/16 jumper cables
jConnection weatherizing materials such as weatherized
tape or sleeving and hose clamps
jCable management tools, per company practice
jWrench (for ground bolt and RF connectors)
Figure 4. Mounting the TMA
Wall Mounting
Insert mounting
hardware through
small round holes
Pole
Strap Route strap
square holes
Mounting
through
Select strap
per company
practice
in top and
bottom
bracket
Figure 5. CIM Feeder and Power Cable Connections
ANT
Connect feeder cable
Connect jumper cable
To
To BTS/eNodeB
female 7/16 DIN
connector labelled ‘ANT’
female 7/16 DIN
connector labelled ‘BTS’
Female, 7/16 DIN
connector
to the TMA’s
to the TMA’s
2. Unpack and inspect the unit. Unpack the unit from the
shipping box and inspect it for any damage (report
damages to the shipping company and to Westell).
3. Remove the covers. Remove the plastic covers that protect
the connectors at the bottom of the TMA
‐ CHECK 7/16 DIN TMA CONNECTORS NOTE ‐
Verify that the TMA is free of any visual defects prior to installation.
In particular, check that the 7/16 DIN TMA connectors are free
from damage.
4. Pre‐attach mounting hardware on the TMA. Prior to as
cending the tower, the hose clamps or mounting straps (not

030‐300302 Rev. A R
Section AWC‐TMV‐850‐301
41312I1RA
provided) should be prepared and pre‐assembled on the
mounting bracket, ready for pole/tower attachment.
‐ GROUNDING NOTE ‐
Always follow the National Electrical Code (NEC) rules, local safe
ty precautions, and standard operating procedures for grounding
the equipment when installing, upgrading, repairing or maintaining
equipment. Any instructions or information contained herein is
subordinate to local codes, operating procedures or practices.
5. Prepare/pre‐assemble ground cable. The TMA must be
grounded. Therefore a ground cable (not provided) must
be prepared prior to installation. The mounting plate has
a threaded hole and bolt with lock washer for attachment
of the ground cable. The other end of the ground cable
must be attached to a good ground point on the tower
structure. Ground may be attached to either mounting
bracket (top or bottom).
6. Raise TMA to mounting height/location on the pole or
tower.
7. Verify proper orientation. Make sure the connectors of the
TMA (will) face/point down in the final mounting location.
‐ MEMBRANE BLOCKAGE NOTE ‐
The correct orientation of the TMA is with the connectors pointing
down. This orientation will prevent blockage of the membrane and
avoid Oring failure.
8. Attach TMA to the pole/tower. Route one end of a mounting
band/strap or hose clamp through the slotted holes in the
mounting brackets, route the end through the tightening
mechanism of the clamp or fastener, then tighten the band,
strap, or clamp around the pole, per manufacturer instruc
tions and/or company practice.
9. Finalize the Ground connection. Finalize the ground con
nections to the TMA by connecting a company‐approved
ground lug/strap and cable to the ground bolt provided in
the upper left corner of the top bracket. This bolt may be
moved to the lower mounting bracket, if desired (plates are
the same). See Figure 6 for mounting plate dimensions.
10. Connect feeder cable to “BTS” connector. Identify and loc
ate the feeder cable that routes from the CIM/eNodeB.
Connect the feeder cable to the female, 7/16, DIN connect
or on the bottom of the TMA labeled “BTS.”
11. Connect jumper cable to “ANT” connector. Identify if a
jumper cable runs from the TMA to the antenna. If one is
not already installed, install a short jumper with some stress
relief between the antenna and the TMA. This eliminates
the large stresses due to thermally driven changes in the
coaxial cable. Connect the jumper cable to the female, 7/16,
DIN connector on the bottom of the TMA labeled “ANT.”
12. Protect the connections. Weatherize the connections made
in all steps above, per company practice.
‐ CAUTION ‐
Particularly important for the TMA to operate over its useful life
is that the connections are tight and weatherized. This is the
primary failure mode for the TMA, so always check these connec
tions thoroughly for tightness and proper weatherproofing.
‐ PAINTING NOTE ‐
If the TMA is painted at the job site, be sure that all mounting bracket
holes, connectors, and the “fiveholes” for ventilation on the back of the
TMA are masked prior to painting and checked for paint after painting.
3.5 Adjusting the TMA Gain
All Westell Variable Gain TMA's support AISG protocol version
2.0 for changing the gain level. As such an AISG 2.0 compliant
control device such as Westell's A99AISGRM3 Rack Mount
AISG Controller, is required to change the gain setting of the
TMA. Operation of an AISG control device is beyond the scope
of this document. Refer to the device manufacturer for instruc
tions on changing TMA gain.
Note that the default gain setting is 13dB.
4. TROUBLESHOOTING
There are no visual indicators on the TMA to indicate if if is
functioning correctly. If the TMA is powered using a Westell
power distribution unit, a faulty state is indicated by a red LED
on the PDU. If the TMA is powered using an AISG control
device, the device may indicate an alarm condition. In all cases,
the primary failure mode is a faulty connection either at the con
nection of the RF feeder cable to the TMA or from the power
source to the Current Injector Modem. Check all cable connec
tions to ensure proper installation.
For troubleshooting beyond the indicators on the PDU or AISG
controller device, the engineer should use diagnostic equipment
that measures VSWR and transfer characteristics of the TMA,
cables, and antennas.
5. CUSTOMER & TECHNICAL SERVICES
If technical or customer assistance is required, contact Westell
by calling or using one of the following options:
Voice: 800‐377‐8766
email: [email protected]
For additional information about Westell, visit the Westell
World Wide Web site at http://www.Westell.com.
‐ TL9000 RECYCLING NOTE ‐
Westell recommends that its products be recycled at the end of their
product life. For Westell products that have reached their product
End Of Life (EOL), please recycle and dispose of the products per
your company practice, per local recycling programs and local
codes, and per state statutes.
6. WARRANTY & REPAIRS
6.1 Warranty. Westell warrants this product to be defect‐
free at shipment time. Westell also warrants this product to be
fully functional for the time period specified by the terms and
conditions governing the sale of the product. Equipment re
pairs/modification attempts by an unauthorized person will void
the warranty.
6.2 Repair and Return. Westell will repair or replace de
fective Westell equipment without cost during the warranty
period if the unit is defective for reasons other than abuse, im
proper use, or improper installation. To return defective
equipment, first request a Return Material Authorization
(RMA) number from Westell (use one of the options shown be

030‐300302 Rev. A
RSection AWC‐TMV‐850‐301
1312I1RA 5
low). Once an RMA number is obtained, return the defective
unit (freight prepaid), with a brief problem description, to the
address we will provide to you when you contact us.
Voice: 630‐375‐4457
email: [email protected]
Replacements will be shipped in the fastest manner consistent
with the urgency of the situation. Westell will continue to repair
or replace faulty equipment beyond the warranty period for a
nominal charge. Contact Westell for details.
7. SPECIFICATIONS
7.1 Regulatory/Agency Specifications
The TMA is designed to meet the following regulatory, safety,
or environmental specifications or requirements:
SIP67
7.2 Ordering Specifications
To order units, call the telephone number shown in Part 5and
please specify a specific model number shown in Table 1.
Part # Description
AWC‐TMAV‐850‐FB Variable Gain, 850 MHz, Full Band, Tower Mounted
Amplifier
Westell sells a complete line of TMAs. Call Westell for further information.
Table 1. Ordering and Option Information
7.3 Electrical and Physical Specifications
The electrical and physical specifications are listed in Table 2.
See Figure 6 for two‐dimensional drawings and additional
product dimensions.
Specification RX TX
RF Performance
Frequency range 824‐849 MHz 869‐894 MHz
Gain / NF
Gain (dB) NF (typ.)
13 1.20
12 1.24
11 1.30
10 1.36
9 1.44
8 1.54
7 1.67
6 1.82
5 2.00
4 2.20
3 2.48
N/A
Return loss > 18 dB (active mode)
> 16 dB (bypass mode) > 18 dB
Insertion loss 1.2 dB (Bypass, typ.) 0.3 dB
Output 3rd Order
Intercept Point +24 dBm N/A
Power Handling (CW / PIP) N/A 500 W / 5 kW
Passive Intermodulation N/A -115 dBm
Electrical/Communication
Power Consumption 1.9 W @ 12 VDC, 4 W @ 24 VDC
Surge Protection: DC
Path 8/20 us 10 kA pulse arrester 75 V, and 1.5 kW TVS 33 V
Lightning Protection Internal shorted stubs
Reverse DC Voltage
Protection -30 VDC
Protocol / Alarms Automatic Detection ‐ AISG or Current Window Alarm
Specification Description
Physical & Environmental
Dimensions (H x W x D) 9”H x 6.6”W x 4.1”D (excluding connectors & brackets)
Dimensions (H x W x D) 12.2” x 6.6” x 4.5” (including connectors & brackets)
Weight 13.75 lbs
Color Offwhite
RF Connector Type Long neck, 7/16 DIN, female
Ground Connector M5 bolt
Mounting Type Pole/post, wall, pedestal; 2 mounting brackets provided
Operating Temperature 40_C to +65_C
Lightning protection 8/20s 10 kA pulse 8/20s 10 kA pulse
Weather Rating IP67 (IEC 60529)
Table 2. TMA Specifications

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Figure 6. Dimensions and Views
8.972" 11.483"
TOP
BOTTOM
6.656"
4.54"
ANT BTS
FRONT
SIDE
.42
5.889"
1.69"
.84"
1" 1"1.1"1.78".385 1.395"
6.656"
.385
.4"
.85
4.12"
1.94"
3.14"
1.2"
.75
1.98" 1.98"
.75
.5"
4.497"
3.51"1.57"
ISOMETRIC VIEW
OF TOP
REAR VIEW OF TOP BRACKET
BRACKET
REAR VIEW
0.695"
1.57"