Westell Modular 255 Series User manual
PRODUCT M
A
N
UAL
WESTELL.COM
©Westell Technologies
.
960-1152-MNL
rE
Digital Repeater Line
DSP95 Modular
255
Series Users Guide
Digital Repeater Line
DSP95 Modular 255 Series Users Guide
Page 2 of 65
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28 August 2015 Doc. No. 960-1250-MNL rE
DISCLAIMER
All information and statements contained herein are accurate to the best of Westell Technologies knowledge. Westell
Technologies makes no warranty with respect there to, including without limitation any results that may be obtained
from the products described herein or the infringement by such products of any property rights of any persons. Use
or application of such information or statements is at the users’ sole risk, without any liability on the part of Westell
Technologies. Nothing herein shall be construed as license or recommendation for use, which infringes upon any
propriety rights of any person. Product material and specifications are subject to change without notice. Westell
Technologies standard terms of sale and the specific terms of any particular sale apply.
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TABLE OF CONTENTS
Preface ........................................................................................................................................................................... 7
Purpose
............................................................................................................................................................................................................. 7
Application...................................................................................................................................................................................................... 7
Document Organization ............................................................................................................................................................................ 7
Reference.........................................................................................................................................................................................................8
Document Conventions ............................................................................................................................................................................. 8
Product Registration Information..........................................................................................................................................................9
Safety Guidelines.......................................................................................................................................................................................... 9
Important Safety
Information.................................................................................................................................................................... 9
Radio
and Television Interference.........................................................................................................................................................10
Industry Certifications/Registration Numbers ................................................................................................................................10
Technical Support.......................................................................................................................................................................................10
Acronyms and Abbreviations.................................................................................................................................................................10
1Product Overview .............................................................................................................................................. 11
1.1 Product Information ..................................................................................................................................................................11
1.2
Functional
Overview....................................................................................................................................................................11
1.3 LED Indicator .................................................................................................................................................................................12
1.4 Local Communication Interface Ports ................................................................................................................................12
1.5
EIA232
Pin Specifications ..........................................................................................................................................................13
1.6 USB Interface.................................................................................................................................................................................13
1.7 Ethernet...........................................................................................................................................................................................13
1.8 Monitoring and Alarms .............................................................................................................................................................13
1.9 Circuit Operational Description.............................................................................................................................................13
2
System Optimization Installation
Tips............................................................................................................... 15
2.1
System Setup
Considerations..................................................................................................................................................15
2.2
Suggested Spectrum Analyzer
Setting ..................................................................................................................................15
2.3 Important Installation Notes ..................................................................................................................................................15
2.4 Installation Tips............................................................................................................................................................................16
2.5 Optional Accessories .................................................................................................................................................................17
3Web-Based GUI .................................................................................................................................................. 18
3.1 Web-Based GUI Session...........................................................................................................................................................18
3.2
System
Status ................................................................................................................................................................................19
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3.3 Local Network...............................................................................................................................................................................21
3.4 RF Configuration..........................................................................................................................................................................22
3.5 Program a Filter ...........................................................................................................................................................................23
3.6 Remote Network .........................................................................................................................................................................24
3.7
SNMP
Configuration ..................................................................................................................................................................25
3.8 System Health...............................................................................................................................................................................27
3.9 Install and Upload.......................................................................................................................................................................28
3.10 Reboot.............................................................................................................................................................................................29
3.11 Alarm Configuration ..................................................................................................................................................................30
3.12 Email Configuration....................................................................................................................................................................31
3.13 Log Configuration.......................................................................................................................................................................32
3.14 Account Credentials...................................................................................................................................................................33
4Console Interface ............................................................................................................................................... 34
4.1 Text Menu Interface (Local Access)......................................................................................................................................34
4.2 Telnet Session (Remote Access)............................................................................................................................................39
4.3 Modem Interface (Remote Access with Login) ...............................................................................................................40
4.4 Additional Tips .............................................................................................................................................................................41
Appendix A
Attenuation
andDynamic Range Guidelines.............................................................................. 45
A.1
Donor
Port......................................................................................................................................................................................45
A.2
Server
Port......................................................................................................................................................................................45
A.3
Dynamic Range
Thresholds ......................................................................................................................................................45
A.4
Large Deltas Between In-band
and
Composite Input
Signals ........................................................................................46
Appendix B Band Plans and
Filter
File
Naming
Conventions............................................................................. 47
B.1
Frequency Band
Plans.................................................................................................................................................................47
B.1.1 700 MHz Upper C Band Plan............................................................................................................................................47
B.1.2
Cellular Frequency Band
Plan .............................................................................................................................................47
B.1.3 AWS Frequency Band Plan ................................................................................................................................................48
B.1.4 Canadian PCS Frequency Band Plan..............................................................................................................................48
B.1.5 US PCS Frequency Band Plan ...........................................................................................................................................49
B.1.6 Public Safety Bands..............................................................................................................................................................50
B.2
Filter
File
Naming
Conventions ...............................................................................................................................................50
B.2.1
700 MHz Filter Naming
Convention ................................................................................................................................50
B.2.2
Cellular Filter
File
Naming Convention
.............................................................................................................................51
B.2.3
Canadian PCS Filter
File
Naming
Convention ...............................................................................................................52
B.2.4 US
PCS Filter
File
Naming
Convention............................................................................................................................53
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B.2.5
AWS Filter Naming
Convention ........................................................................................................................................54
Appendix C Mechanical Configurations..............................................................................................................56
C.1 Digital Repeater Mechanical Drawings .............................................................................................................................56
C.2 Digital Repeater Mounting Drawings, Modular Series High Power ......................................................................57
C.2.1 Wall Mounting .......................................................................................................................................................................57
C.2.2 19” Relay Rack Mounting...................................................................................................................................................57
C.2.3 19” Four Post Rack Mounting ..........................................................................................................................................58
Appendix D Mechanical and
Electrical Specifications
...................................................................................... 59
D.1
Mechanical
Specifications.........................................................................................................................................................59
D.2 AC
Power
Specifications............................................................................................................................................................59
D.3
Environmental
Requirements...................................................................................................................................................59
D.4
Operating Power
Parameters...................................................................................................................................................60
Appendix E Port
Configurations
............................................................................................................................ 62
E.1 Dual-band D2:D1 Port Configuration .................................................................................................................................62
E.2 Dual-band D1:D2 Port Configuration .................................................................................................................................62
E.3 Dual-band D2:D2 Port Configuration .................................................................................................................................63
E.4 Dual-band D1:D1 Port Configuration .................................................................................................................................63
Appendix F Glossary .............................................................................................................................................. 64
TABLE OF FIGURES
Figure 1-1: Pin Description ........................................................................................................................................................................... 13
Figure 3-1: User Connection Login............................................................................................................................................................18
Figure 3-2: System Status.............................................................................................................................................................................. 19
Figure 3-3: System Operations.................................................................................................................................................................... 20
Figure 3-4: Local Network.............................................................................................................................................................................21
Figure 3-5: RF Configuration........................................................................................................................................................................22
Figure 3-6: Program a Filter ......................................................................................................................................................................... 23
Figure 3-7: Remote Network........................................................................................................................................................................24
Figure 3-8: SNMP Configuration................................................................................................................................................................ 25
Figure 3-9: Time Configuration................................................................................................................................................................... 26
Figure 3-10: System Health ..........................................................................................................................................................................27
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Figure 3-11: Install & Upload....................................................................................................................................................................... 28
Figure 3-12: Reboot.........................................................................................................................................................................................29
Figure 3-13: Alarm Configuration ..............................................................................................................................................................30
Figure 3-14: Email Configuration ............................................................................................................................................................... 31
Figure 3-15: Log Configuration................................................................................................................................................................... 32
Figure 3-16: Account Credentials............................................................................................................................................................... 33
Figure 4-1: Null Modem Cable....................................................................................................................................................................34
Figure 4-2: Gender Adaptor .........................................................................................................................................................................34
Figure 4-3: Ter Term Pro Web Start Up ................................................................................................................................................... 35
Figure 4-4: Serial Radio Button................................................................................................................................................................... 35
Figure 4-5: Setup .............................................................................................................................................................................................. 35
Figure 4-6: Serial Port Setup........................................................................................................................................................................ 36
Figure 4-7: TMI Main Menu.......................................................................................................................................................................... 37
Figure 4-8: Adjust Gain................................................................................................................................................................................... 38
Figure 4-9: User Gain ......................................................................................................................................................................................38
Figure 4-10: Selecting Filter Programs.....................................................................................................................................................39
Figure 4-11: Default IP Address.................................................................................................................................................................. 39
Figure 4-12: Log In Menu..............................................................................................................................................................................40
Figure 4-13: Main Menu ................................................................................................................................................................................ 40
Figure 4-14: Control Panel............................................................................................................................................................................ 41
Figure 4-15: View Network Status and Tasks........................................................................................................................................41
Figure 4-16: Change Adapter Settings.....................................................................................................................................................42
Figure 4-17: Local Area Network................................................................................................................................................................ 42
Figure 4-18: Internet Protocol Version 4 (TCP/IPv4) .......................................................................................................................... 43
Figure 4-19: Enter IP Address ...................................................................................................................................................................... 43
TABLE OF TABLES
Table P-1: Document Conventions...............................................................................................................................................................8
Table F-1: Acronyms and Abbreviations ................................................................................................................................................. 64
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Preface
This Preface includes the following:
Purpose
Application
Document Organization
References
Document Conventions
Product Registration Information
Safety Notices
Important Safety Information
Radio and Television Interferences
Industry Certifications/Registration Numbers
Technical Support
Acronyms and Abbreviations
Purpose
The
purpose
of this
document
is to
provide
a
step-by-step procedure
to help the
experienced technician/engineer
install
and
commission
an in-building wireless
enhancement
repeater system using Westell Technologies digital
repeaters.
Following the
procedures
outlined will minimize risks
associated
with
modifying
a live system and prevent
service
interruptions.
This
document assumes
the
technician/engineer understands
the basic
principles
and functionality
involved
with
repeater
and
in-building systems.
It is
geared
to the
practical concerns
of the installer.
Application
This
guide should
be
applied whenever
a
need exists
to add
digital repeater capability
to an
existing system
or
when
this
capability
is
being included
with a new installation.
Document Organization
This manual includes the following chapters:
Chapter 1: Product Overview –Provides an Overview of the DSP95 Module 255
Chapter 2: System Optimization Installation Tips –Provides information for optimization of using the system
Chapter 3: Web-Based GUI –Provides information on using the system through a web-based graphical user interface
Chapter 4: Console Interface –Provides information on local access to the repeater through console interface
Appendix A: Attenuation and Dynamic Range Guidelines –Provides information on attenuation and dynamic
range guidelines
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Appendix B: Band Plans and Filter File Naming Conventions –Provides information on the band plans and filter
file naming conventions
Appendix C: Mechanical Configurations –Provides mechanical drawings and mounting diagrams for the system
Appendix D: Mechanical and Electrical Specifications –Provides the mechanical and electrical speciation for the
system
Appendix E: Port Configuration –Provides the port configuration information for the system
Appendix F: Glossary –Provides a list of acronyms used in this manual
Reference
Westell Technologies Power Supply Users Guide, part number 960-1152-MNL
Document Conventions
Table P-1 lists the conventions used throughout this document.
Table P-1: Document Conventions
Convention
Description
WARNING!
Indicates conditions or practices that could cause personal injury or death. Before you
work on any equipment, be aware of the hazards involved with electrical and RF circuitry
and be familiar with standard practices for preventing accidents.
CAUTION!
Indicates conditions or practices that could cause damage to equipment or property, for
indicating information that is crucial to preventing loss of data or damage to hardware or
software, and actions that could result in catastrophic equipment failure.
NOTE
Indicates additional information or comments that may be useful to the user.
Bold
Bold typeface indicates equipment labels and provides emphasis.
Click
Indicates for the user to press the primary (typically left) mouse button while the pointer is
over the specified location.
Right-click
Indicates for the user to press the secondary (typically right) mouse button while the
pointer is over the specified location.
Double-click
Indicates for the user to press the primary (typically left) mouse button twice, rapidly,
while the pointer is over the specified location.
Select
Indicates for the user to perform a selection on the screen by clicking an active object.
Enter
Indicates for the user to type text using the keyboard.
>
Indicates a level in a menu. For example, Start>Programs prompts the user to click on
Start, then locate and click Programs, under the Start menu.
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Product Registration Information
The serial
number
may be
found
on the label on the
bottom panel,
near the
power connectors. Write
this
number
in the
boxes shown below. Retain this manual, along with proof
of
purchase, to serve as
a
permanent record
of
your
purchase.
MODEL NUMBER SERIAL NUMBER PURCHASE DATE
POINT OF SALE COMPANY
Safety Guidelines
The general safety
information
in this
guideline
applies to both
operating
and service
personnel. Specific warnings
and
cautions will be found in other parts of this manual where they apply, but may not appear in this summary. Failure to
comply
with these precautions
or
specific warnings elsewhere
in
the manual violates safety standards
of
design, manufacture,
and
intended
use of
equipment.
Westell Technologies
assumes
no
liability
for the
customer’s failure
to
comply
with
these
requirements:
Grounding:
This digital
repeater system
is
designed
to
operate
from
100 - 240
VAC and should always be operated with
the
ground
wire
properly connected.
Do not
remove
or
otherwise alter
the
grounding
lug on the
power
cord.
Explosive atmospheres:
To
avoid explosion
or fire, do not
operate
this
product
in the
presence
of
flammable
gases or
fumes.
Lightning
danger: Do not install or make
adjustments
to this unit during an electrical storm. Use of a suitable
lightning arrester, such
as
Westell Technologies CSI-CAP,
is
strongly
recommended.
No user
serviceable
parts inside.
Hazardous voltages
are
present
when the cover is
removed. Opening
the
chassis
will
void your
warranty.
If you suspect a
malfunction
with this product, call your dealer or Westell Technologies
technical
support line at 1.877.844.4274
CAUTION!
Power off before connecting/disconnecting cables.
Important Safety
Information
Antennas used
for the
purpose
of
radiating signals indoors
are
limited
to a
maximum
gain of 3 dBi. The
outdoor
antenna
used
for the
purpose
of
communicating
to the
wireless infrastructure
is
limited
to 14 dBi
gain,
or any
combination
of gain
and loss that
equates
to 14 dB at
input.
Each
antenna
must be
positioned
to
observe minimum separation
requirements
from
all
users
and
bystanders.
The
following guidelines should
be
used when considering separation
distances.
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Indoor antennas
must be
placed
such that,
under normal conditions, personnel cannot
come within 20 cm (~8 in) from
any inside antenna. Adhering to this
minimum separation
will ensure that the
employee
or
bystander
cannot exceed
RF exposures beyond the maximum
permissible
limit as defined by section 1.1310 i.e. limits for general
population/
uncontrolled
exposure.
Outdoor antenna must
be
positioned
such
that, under normal conditions, personnel cannot approach closer
than 183 cm
(~6 ft).
A
directional antenna having
a
maximum gain
of 14 dBi is
used, precautions should
be
taken
to
prevent
personnel
from
routinely passing through
the main
radiation beam
at a
distance closer
than specified.
Radio
and Television Interference
This
equipment
has been
tested
and found to
comply
with the limits for a Class A digital
device, pursuant
to Part 15 of
the Federal Communications Commissions (FCC) rules. These limits are designed
to
provide reasonable protection
against
harmful
interference
when the
equipment
is operated in a
commercial environment.
This
equipment generates,
uses
and can radiate radio
frequency
energy and, if not installed and used in
accordance
with the
instruction manual,
may
cause
harmful interference
to radio
communications. Operation
of this
equipment
in a
residential
area is likely to cause
harmful interference
in which case the user will be
required
to
correct
the
interference
at his own
expense.
In order to
maintain compliance with FCC regulations shielded cables must be used with this equipment. Operation with
non-approved
equipment or unshieled cabled
is
likely to result
in
interference to radio and television reception. Changes and modifications
not
expressly approved
by Westell Technologies can void
your authority
to
operate
this
equipment under
FCC rules.
Industry Certifications/Registration Numbers
FCC
NVRCSI-DSP25XH-CP
IC
4307A-DSP25XH-CP
UL
Power supply 60950-1
Technical Support
If you suspect a malfunction with this product or have a technical question, call your dealer or the Cellular Specialties
Support Line at: (603) 626-6677, Toll Free (USA) 1-877-844-4274, press option 2 then option 1. Also they can be
reached at productsupport@cellularspecialties.com.
Acronyms and Abbreviations
Refer to the Glossary at the end of this manual for definitions of the acronyms and abbreviations used in this manual.
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1Product Overview
1.1 Product Information
Westell Technologies developed its digital repeaters for use within enclosed structures where sufficient signal from
local cell sites to
operate
cell
phones
is
unavailable. Adequate signal must
be
available outside
the
structure
as a
prerequisite
to achieving
in-building coverage.
The digital
repeater
is
connected
to an
external antenna, usually
on the
roof, and to one or more
internal antennas placed strategically throughout
the
area where wireless service
is desired.
The
external
antenna typically is
directional,
such as a yagi. Internal
antennas
are typically
omnidirectional,
although
various
other
types
may be used
depending
on the
coverage application.
The Westell Technologies
Digital Signal
Processing
(DSP)
repeater amplifies
both the uplink
(phone
to
tower) and downlink (tower
to
phone) signals thus facilitating
communications
to
and from the intended
wireless infrastructure.
With a
maximum
total of 90 dB
nominal
gain on both the uplink and
downlink,
gain can be
adjusted
over a range from
58.5
dB to 90 dB in 0.5 dB
steps. Control
of the
repeater
is
achieved utilizing
a
computer connected
to
COM port
or via a
crossover Ethernet cable connected
to the
Ethernet
port.
A
specific filtering
process
modifies
each
amplification
chain. This process digitally
converts
the
assigned spectrum
and
then applies DSP techniques. DSP
is
used to create passbands that selects the RF energy
passing
through
either the uplink
or
downlink
paths. After the digital
processing
is
complete,
the
information
is
converted
back to an
analog signal
that is
applied
to the
remaining stages
of
amplification.
The
resulting signals emitted
by the
repeater
are specific to the network
service
providers’ requirements.
If these
requirements
change, only the DSP
configuration parameters
need change in
order to adapt.
Configuration parameters
are created at the factory and supplied as files that may be
downloaded
to
the
repeater.
The filter set
configurations stored
in
memory determine
the unit’s
adaptability
to
various
field
applications.
The
following
pages
describe
the band plans as well as the
convention
Westell Technologies uses to identify and store
the files that make up the filter set. All Westell Technologies
repeaters
are
shipped
with an active filter set that is
programmed according
to the
ordering parties’ specifications.
In
most cases,
the
installer
will not be
required
to
program
a filter.
1.2
Functional
Overview
Westell Technologies
digital repeaters incorporate
the
following features
for
convenient operation, access, protection,
and
control.
Network configuration
and control using either a Web page style Graphical User Interface (GUI)
through
any
standard browser
or a menu
driven user interface using
the
serial port.
GUI
does
not
require Internet
access
User gain control (affects
all passbands)
Automatic
gain control
Automatic power
control
Over drive protection
(PA limiting)
Under/over voltage
protection
Fault
protection
Alarm notification
- local/remote
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Upgrade support
- local/remote
External interfaces
- USB/Ethernet/serial
Re-loadable Filters
- local/remote
Web-based monitoring
and
control
- local/remote
Persistent status
and
error
information
1.3 LED Indicator
Westell Technologies automatic safety precautions are built into the amplifier system. In the case of a catastrophic
system event, a
shutdown circuit
is
incorporated
that will
disable
all
emissions should
the
uplink
input or
downlink
input
be
over driven
or
should
an
oscillation
or
output overpower event occur.
The
amplifier
will
periodically attempt
to
recover
from
the detected
condition automatically. Warning
light
indicators
are as follows:
Solid green:
Unit is
operational,
PA is on
Solid red:
Unit has an
error condition
or PA is off
The
user may check
the
status page
of the GUI for the
nature
of the fault.
NOTE
On
power
up, the
repeater
will
require approximately three (3) minutes
for the
internal
computer
to
boot. During
this time the LED
labeled Power/Fault
or
Status
will
slowly
blink green on and off at a rate of
approximately
1 Hz. This will indicate that the unit is
in the
boot
up process. Filter configuration file loading will show green light blink
two (2) seconds on / three (3) seconds off until finished.
Do not
unplug
the unit
while
it is in the
boot
up process.
1.4 Local Communication Interface Ports
To allow monitoring and control, Westell Technologies repeaters are
equipped
with four ports that provide external
communication access (one Ethernet CAT-5, one
DB-9 serial, and
two
USB). The Ethernet, CAT-5
port is
provided
as a
primary communications port
to the PC. The serial interface provides communications to a PC and the USB interface
provides a means to download files from a memory device. The DB-9 pin assignments conform to the standard
Electronic Industries Association (EIA232) specification. A
diagram
of the pin
descriptions
is
provided
in Figure 1-1 for
reference. Connecting a null modem cable to one of the COM ports and using a terminal emulation program with a
PC will allow communication to the control processor’s Text Menu Interface (TMI).
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Figure 1-1: Pin Description
1.5
EIA232
Pin Specifications
Figure 1-1 is for
reference
only. It is
intended
to
provide
a quick source for pin out
information
in the event it
should be
necessary
to
adapt your serial cable because
of
an unusual connector configuration.
In
the vast majority
of cases this
information
will not be needed.
1.6 USB Interface
The USB
interface conforms
to
Intel’s Universal
Host
Controller Interface (UHCI) version
1.1
dated March
21,
1996.
This
interface
will
support
data
transfer rates
up to 12
Mbps
and can be used for
software updates
and
filter
file
uploads.
1.7 Ethernet
The
Ethernet
AUI
conforms
to IEEE
802.3
and is
capable
of
supporting 10/100 Mbps communications speeds.
This port is
used
to
provide access
to the GUI.
1.8 Monitoring and Alarms
The DSP 95 series can be monitored via an Ethernet connection using SNMP, SSH and/or HTTP protocols. Public
Safety DSP models have dry contacts for traditional alarm panel monitoring as well.
1.9 Circuit Operational Description
The
repeater
uses a single down
conversion/up conversion scheme.
There are
multiple
RF
amplifier
stages prior to each
down-converting
mixer. The
down-converting
mixers are followed by a single IF
amplifier.
A DSP block then
processes
the
resultant digitized
IF signal that was
previously generated
by an
analog-to-digital converter.
The
processed (filtered)
digital signal is fed to a
digital-to-analog
converter and then
up-converted
to RF. A driver
amplifier
and a final power
amplifier make
up the
final
gain
stages before application
to the
diplexer.
The
maximum
total
system
gain
(diplexer
input
to diplexer output) is
nominally
90 dB for either the downlink or the uplink paths with both links having independent
manual
and
Automatic Gain Controls
(AGC).
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AGC reacts to analog power
detection
on both the input and output of the uplink and downlink RF chains. A control
algorithm continuously monitors
these
detected
values and
dynamically
adjusts various gain stages such that the net
system gain value, entered manually,
is
optimally maintained without either exceeding FCC parameters
or
over driving
the
A/D converters.
An LED on the front panel provide
immediate
visual
indication
of the unit’s primary power alarm status. The repeater
features automatic shutdown protection as
a
safety measure should excessive drive be applied
to
the input
or
an
oscillation
condition occur. When in a
protected
mode, a control
algorithm determines
the
appropriate
method of recovery to a
normal, previously defined
state, or
maintains
the
protection
until
manually
reset. If
recovery
has been
established,
the
LED will be
illuminated green
or
available
to be
reset.
The
events
that
trigger
the
error
will be
saved
in the
event
log.
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2
System Optimization Installation
Tips
2.1
System Setup
Considerations
All
cables should
be
checked
for
shorts and opens. Also verify that there
are no
cables with loose
or
poor connections.
RF
leakage could cause oscillation
to
occur under some
conditions.
The rooftop antenna (donor antenna),
if
directional, should be checked for proper alignment along the calculated
compass
heading. Typically, the directional antenna would
be
aimed
at
the same site that your handset uses, but
it
may not
always be
so. It is
critical the installer contact the service provider
for
information
on,
and approval
of,
the
cellsite heor
she
has
selected
before
the
system
is
turned
on.
If cables and
alignment
are
acceptable
and a problem persists, it may be
necessary
to use a
spectrum
analyzer to
examine
the signal
environment
in which the
repeater
is
operating.
The
existence
of strong
adjacent
channel signals
within
the
frequency band(s) can cause
the
AGC
to
reduce
the
amplifier’s gain
or
cause alarms.
In
some cases, additional
filtering
or
attenuation might
be
required
to
reject these unwanted signals.
In
some instances,
the
donor antenna
can be
reoriented horizontally,
to
place
the
interference source
in an
antenna pattern null. There also may
be
some cases
where the
interference
from
outside signals
is so great that they
cannot
be
filtered
or
otherwise reduced
or
eliminated
without
expensive
and
possibly prohibitive measures.
In these cases, it may not be
practical
to use the
repeater
for providing
coverage
to
these
sites.
2.2
Suggested Spectrum Analyzer
Setting
When
troubleshooting
RF
issues,
and when
surveying challenging
RF
environments,
it is
important
to have a spectrum
analyzer capable
of
measuring the frequency that you are working with. An attenuator should be used
to
protect the
input
when connected
to a
source
of RF
power such
as the
repeater
or a
powered
DAS.
Both uplink and downlink should be
measured.
Downlink should be
measured
on the donor cable and at the output
(server)
port of the
powered
up
repeater,
and uplink at the lead from the DAS (on
fiber-powered
DAS, where the lead
would
connect
to the
server
port on the
repeater)
and at the donor port with the
repeater powered
up. Measurements
may also
be
necessary
at
server antenna locations. Your spectrum analyzer
will
need
to be
equipped with
a
whip
antenna for
this.
Resolution BandWidth (RBW) should
be set at 200 kHz for GSM and 1 MHz for
CDMA.
If you
cannot select these
values,
the
closest available values should
be
used. Video filter should
be
about one-tenth
of RBW.
If you
cannot
see an
adjacent
out of
band signal when using
the 1 MHz RBW
filter,
you can
decrease
the RBW to see the
close-in-frequency signals.
Be
sure
to set the
RBW back when
you
want
to
measure
the
power
level.
2.3 Important Installation Notes
Inadequate
isolation between the outside and inside
antennas
may cause
regenerative feedback
in the system. This
feedback
can cause the
amplifier
to emit a
continuous
signal at
maximum amplitude
and, in some cases,
interfere
with
normal operation
of the cell
site. Careful consideration
of the
layout
and
placement
of the
system
is imperative.
The installer should refer to Section0
Safety Guidelines
and 0
Important Safety
Information
for
proper
antenna selection
and
installation.
To avoid
serious injury
or
death
and
damage
to the
repeater,
do not install
donor
or
server antennas near
overhead power lines
or
high power components. Allow enough distance
so
that
if
antennas
should fall
they
will not
come
in
contact
with
those
components.
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Close proximity
to
the donor
or
server antennas with the repeater
in
operation may expose the user
or
installer
to RF fields
that
exceed
FCC
limits
for
human
exposure.
WARNING!
Amplifier
or
handset damage may occur
if a
handset
is
connected directly
to
the repeater
or
the coax that
leads to the repeater.
2.4 Installation Tips
Donor
Antenna
1.
Accurately determine
the
azimuth
to the
donor
cell site.
Obtain
the
donor
site
information
and
approval from
the
service
provider/carrier.
2.
Ensure
that the
radiation path
to the
donor
cell site is as
unobstructed
as possible.
3.
Mount
the
donor antenna
at or
toward
the
edge
of the
roof,
in the
direction
of the
donor site.
Try to
avoid
having
the RF signal from the
donor
pass
above
the
location(s)
of the
service antennas. Normally
the
service
antennas
will be
behind
and
below
the
donor antenna
if
viewed from above.
This
approach
will help
avoid interference
and
feedback both
to and
from
the
service
antennas.
4.
Normally mounting
the
donor antenna higher
will
allow
a less
obstructed path
to the
donor site. However,
in high
traffic metro areas avoid mounting the donor antenna any higher than necessary
as
the quality
of
the donor
signal
may start
to
become
less
stable
and it is
more likely
to
encounter adjacent channel
interference.
5. When possible, shield the donor
antenna’s
backside by locating it so that any HVAC units and/or penthouse
structures
are
behind
the
antenna relative
to the
donor
cell site location.
6.
System components should
be
grounded
in
accordance
with NEC
810-15,
21 as required.
Antennas
1. Use
omnidirectional antennas indoors,
and locate them
centrally
with
respect
to the
intended coverage
area to
minimize
signal
leakage
to the
outside.
Use
directional antennas indoors
only in special cases when
higher
gain
and
directionality would
be
helpful
and RF
exposure limits
will not be exceeded.
2. To avoid
repeater uplink overload
and gain
limiting, mount
the
indoor antennas
away from areas
where
mobile
subscribers frequently
use
their phones such
as
desks
or
dispatch
areas.
3. To determine the quantity and locations of indoor antennas, use an appropriate phone’s signal meter to
determine areas of weak signals. These are the approximate areas where indoor antennas may be needed.
Also be aware the signal from an indoor antenna, in most cases, can be expected to penetrate about two
standard office sheetrock-type walls to reach users. After two walls, or if the walls are made of other
materials, it may be necessary to split the available signal and add more antennas.
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2.5 Optional Accessories
A
complete line
of
accessories
is
available from Westell Technologies. Check with your Westell Technologies distributor for
any additional items needed.
Below are just a few
examples suitable
for
most in-building
needs.
Outside donor
antenna
PCS -
model number
CSI-AY/1.85-1.99/10 dB
Cellular
-
model number
CSI-AY/806-960/14 dB
LTE
–model number CSI-AY/806-960/11 dB
LTE
–model number CSI-AY/806-960/14 dB
Inside omnidirectional
antenna
Quad-band
-
model number
ClearLink™ - O/698-2.7K/N
Power
dividers
2:1 -
model number
CSI-SPD2/700-2.7K/N
3:1 -
model number CSI-SPD3/700-2.7K/N
4:1 -
model number CSI-SPD4/700-2.7K/N
Directional
couplers
6 dB - ClearLink™
-DC6/698-2.7K/N
10 dB - ClearLink™
-DC10/698-2.7K/N
15 dB - ClearLink™
-DC15/698-2.7K/N
20 dB - ClearLink™
-DC20/698-2.7K/N
30 dB - ClearLink™
-DC30/698-2.7K/N
19”
Rack shelf
-
model number CSI-RMS-250
UPS
Battery backup,
two
hour single-band,
one
hour dual-band
-
model number
CS48-985-600
Battery backup,
four
hour single-band,
two
hour dual-band
-
model number
CS48-985-601
Cross band couplers
Quad-band Rack Mount
-
model number CSI-CM250-7/C/AW/P (700
LTE,
Cellular, AWS
and PCS)
Quad-band
Wall
Mount
-
model number CSI-CBC/696-2170/N (700
LTE,
Celllar, AWS
and PCS)
Tri-band Rack Mount
-
model number CSI-CM250-U7C/C/P (700 Upper
C LTE,
Cellular
and PCS)
Tri-band
Wall
Mount
-
model number CSI-CBC21/740-1990/N (700 Upper
C LTE,
Cellular
and PCS)
Tri-band Rack Mount
-
model number CSI-CM250-L7ABC/C/P (700 Lower
A/B/C LTE,
Cellular
and PCS)
Tri-band
Wall
Mount
-
model number CSI-CBC21/696-1990/N (700 Lower
A/B/C LTE,
Cellular
and PCS)
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3Web-Based GUI
3.1 Web-Based GUI Session
Primary access to the repeater is gained using a LAN connection and a Web
browser program
such as
Firefox
by
Mozilla,
or Internet Explorer from Microsoft (Figure 4). The repeater ships with the
default
IP
address
of
192.168.1.100,
but can
be
changed
later if required. If
connecting
directly to the repeater from a laptop or PC with a
crossover CAT-5E cable
or
over
a
LAN, the user types the
IP address of the
repeater
into the
browser address
line to
connect.
Most
users will
need
to
update
the
TCP/IP settings
on
their computer
to enable
connection
to a host that has a static IP.
Select
Use the following IP Address and enter the IP address as follows:
192.168.1.x
,
where ‘x’ = any number from
2 to 254 inclusive other than 100. The subnet mask is
255.255.255.0. Questions pertaining
to these
settings should
be
referred
to the
user’s
IT
department
or refer to section 4.4 Additional Tips. When
connection
is made the user will be
prompted
for a user name and
password.
For the
purpose
of the GUI
session,
the
default user name
is
webuser
and the
password
is
CSI1234
as shown in
Figure 3-1
.
This can also be
changed
as
required. Internet access
is not
required
to use
the GUI. If you are
connecting
using a
laptop,
verify that your
Ethernet
port is
plugged in. Some laptops
will not allow
Ethernet connection when operating
on
battery power.
Figure 3-1: User Connection Login
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3.2
System
Status
When
login is
complete, the
System Status
page
is displayed, as shown in Figure 3-2Error! Reference source not
found.. The Navigation Box on the left hand side of the menu as shown in Figure 3-3 shows available operations.
Selecting the operation will bring you to the page for that operation
Figure 3-2: System Status
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Figure 3-3: System Operations
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