Westell CSI DSP25XS8 Users Manual
CSI-DSP85-250-PS7, CSI-DSP85-251-PS7
&
CSI-DSP85-250-PS8, CSI-DSP85-251-PSS8
Table of Contents
Document Purpose / Intended Users ................................................................................................................................. 4
Application ........................................................................................................................................................................... 4
Product Registration Information....................................................................................................................................... 4
Safety Guidelines................................................................................................................................................................. 4
Important Safety Information ............................................................................................................................................. 5
Product Introduction ........................................................................................................................................................... 5
T erms used in this manual ................................................................................................................................................. 5
700 MHz Filter Naming Convention and Band Plan............................................................................................................ 6
800 MHz Filter Naming Convention and Band Plan............................................................................................................ 7
LED Indicator........................................................................................................................................................................ 8
Functional Overview ............................................................................................................................................................ 8
Local Communication Interface Ports ............................................................................................................................... 9
Monitoring & Alarms ........................................................................................................................................................... 9
Ethernet................................................................................................................................................................................ 9
USB Interface....................................................................................................................................................................... 9
Selection of external attenuators to be used in line with the Antenna Port(s): ............................................................ 10
System Set-Up Considerations ........................................................................................................................................ 10
DONOR PORT ..................................................................................................................................................................... 10
Attenuator Selection Guidelines........................................................................................................................................11
SERVER PORT .....................................................................................................................................................................1 1
Mounting the Digital Repeater .......................................................................................................................................... 12
Optional Accessories ....................................................................................................................................................... 13
Dry Contact T erminal......................................................................................................................................................... 13
Circuit Operational Description ........................................................................................................................................ 14
Important Installation Notes ............................................................................................................................................. 14
Functional Block Diagram ................................................................................................................................................. 14
AC Power Specifications .................................................................................................................................................. 15
Environmental Requirements ........................................................................................................................................... 15
Mechanical Specifcations ................................................................................................................................................ 15
Operating Power Parameters .......................................................................................................................................... 16
Mechanical Drawing......................................................................................................................................................... 17
System Status: .................................................................................................................................................................. 18
Web based GUI Session.................................................................................................................................................... 18
Local Network:................................................................................................................................................................... 19
Program a Filter: ................................................................................................................................................................ 20
RF Configuration: ............................................................................................................................................................... 20
Remote Network:............................................................................................................................................................... 21
SNMP Configuration: ......................................................................................................................................................... 21
Install & Upload: ................................................................................................................................................................. 22
System Health:................................................................................................................................................................... 22
Reboot: ............................................................................................................................................................................... 23
Email Configuration: .......................................................................................................................................................... 23
Alarm Configuration: ......................................................................................................................................................... 23
Change Password: ............................................................................................................................................................ 24
Log Configuration: ............................................................................................................................................................. 24
T erminal Emulation Program............................................................................................................................................ 25
T ext Menu Interface (Local Access) ................................................................................................................................ 25
Terminal Emulation Set-up................................................................................................................................................ 26
TMI Login ............................................................................................................................................................................ 27
T elnet Session (Remote Access)..................................................................................................................................... 29
Telnet Session Login......................................................................................................................................................... 30
Modem Interface (Remote Access with login) ................................................................................................................ 31
Additional Tips ................................................................................................................................................................... 32
Suggested spectrum analyzer setting:............................................................................................................................ 34
RF Notes: ............................................................................................................................................................................ 34
Industry Certifications/Registration Numbers:................................................................................................................ 35
Index................................................................................................................................................................................... 36
Product Registration Information
The serial number may be found on the label on the bottom panel near the power
connectors. Note this number below. Retain this manual, along with proof of purchase, to serve as a permanent record of your purchase.
MODEL NUMBER SERIAL NUMBER DA TE OF PURCHASE
POINT OF SALE COMPANY
DISCLAIMER: All information and statements contained herein are accurate to the best of the knowledge
of Cellular Specialties, Inc. (CSI), but Cellular S pecialties makes no warranty with respect thereto, including
without limitation any results that may be obtained from the products described herein or the infringement
by such products of any proprietary 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 Cellular Specialties, Inc. Nothing
herein shall be construed as licence or recommendation for use, which infringes upon any proprietary
rights of any person. Product material and specifications are subject to change without notice. Cellular
Specialties’ standard terms of sale and the specific terms of any particular sale apply.
Document Purpose / Intended Users
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 CSI’s Digital Repeater. 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.
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. Cellular Specialties, Inc. 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 CSI’s model number CSI-CAP, is very 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
the Cellular Specialties Support Line at: (603) 626-6677, Toll Free (USA) 1-877-844-4274.
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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 14dBi gain, or any combination of gain and loss that equates to
14dB 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.
INDOOR antennas must be placed such that, under normal conditions, personnel cannot come within 60 cm (~2.0 ft) 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.
T erms used in this manual
AGC= Automatic Gain Control ERP= Effective Radiated Power
APC= Automatic Power Control FPGA= Field Programmable Gate Array
AUI= Attachment Unit Interface LED= Light Emitting Diode
CPU= Central Processing Unit OIP3= Third-Order Intercept Point
CSI= Cellular Specialties, Inc. RF= Radio Frequency
DAS= Distributed Antenna System SBC= Single board Computer
DHCP= Dynamic Host Configuration SNMP= Simple Network Management Protocol
Protocol TMI= Text Menu Interface
DSP= Digital Signal Processing USB = Universal Serial Bus
EEPROM= Electrically Erasable UHCI = Universal Host Controller Interface
Programmable read only Memory
Product Introduction
Cellular Specialties, Inc. (CSI) developed the DSP85 digital repeater for use within enclosed structures where signal from local dispatch
sites is insufficient to operate on scene communication equipment. 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 CSI DSP Repeater amplifies both the “uplink” (Transceiver to tower) &
“downlink”(tower to Transceiver) signals thus facilitating communications to and from the intended wireless infrastructure.
With a maximum total of +85dB nominal gain on both the up and down links, gain can be adjusted over a range from +53.5dB to +85dB in
0.5dB steps. Control of the repeater is achieved utilizing a computer connected to comm. port 1 or 2 or via a Crossover Ethernet cable
connected to the Ethernet port. There are also LED indicators near the display to indicate ALARM status, AGC status, UL PWR, DL PWR,
OSC, SHUT DWN and a D/L SIGNAL STRENGTH bargraph.
A specific filtering process modifies each amplification chain. This process digitally converts the assigned spectrum and then applies
digital signal processing (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 public safety band plan as well as the
convention CSI uses to identify and store the files that make up the filter set. All DSP85 repeaters are shipped with an active filter set that
is programmed according to the ordering parties’ specifications. In most cases, the installer will not have to program a filter.
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700 MHz Filter Naming Convention and Band Plan
CSI Public Safety 700 MHz Band Filter File Naming Convention
Single Channel Block Filter File Name Example
7n9-168-0
Public Safety 700 MHz band, 6.25 KHz
Cannels, Uplink Start Freq of 794.0500 MHz,
Uplink Stop Freq of 795.0500 MHz, Downlink
Start Freq of 764.0500 MHz, Downlink Stop
Freq of 765.0500 MHz with standard guard
band.
Band
ID
Channel
Width ID
Start Channel
Number (see formula)
End Channel
Number (see formula)
Dash Indicates That
All Channels between
Start and Stop Are
Included
Separator
Variant
Designator
7w2-21_101-120-0
Multi Channel Block Filter File Name Example
Public Safety 700 MHz band, 50
KHz Channels, 1st Channel Block
Uplink Start Freq of 797.0500
MHz, 1st Channel Block Uplink
Stop Freq of 798.0500 MHz, 1st
Channel Block Downlink Start
Freq of 767.0500 MHz, 1st
Channel Block Downlink Stop
Freq of 768.0500 MHz, 2nd
Channel Block Uplink Start Freq
of 802.0000 MHz, 2nd Channel
Block Uplink Stop Freq of
803.0000 MHz, 2nd Channel Block
Downlink Start Freq of 772.0000
MHz, 2nd Channel Block Downlink
Stop Freq of 773.0000 MHz with
standard guard band.
Band
ID
Start Channel
1st Block (see formula)
End Channel
1st Block (see formula)
Underscore Indicates
the Gap Between
Channel Blocks
Start Channel
2nd Block (see formula)
End Channel
2
nd
Block (see formula)
Notes:
1. 7 = Public Safety Band 700 MHz
2. n = 6.25 KHz Channels, w= 50 KHz Channels
3. See the formulas to correlate frequencies to the
channel numbers used in this file name convention.
4. CSI DSP II repeaters are capable of up to four channel
blocks in one file configuration.
Channel
Width ID
To determine frequency from channel number use one of the following formulas:
For NBDL Start: (Channel # x 0.00625) + 763.99375 = Frequency
For NBDL Stop: (Channel # x 0.00625) + 764.0000 = Frequency
For NBUL Start: (Channel # x 0.00625) + 793.99375 = Frequency
For NBUL Stop: (Channel # x 0.00625) + 794.0000 = Frequency
For WBDL Start: (Channel # x 0.05) + 766.95 = Frequency
For WBDL Stop: (Channel # x 0.05) + 767.0000 = Frequency
For WBUL Start: (Channel # x 0.05) + 796.95 = Frequency
For WBUL Stop: (Channel # x 0.05) + 797.0000 = Frequency
DSP II Public Safety 700MHz Band Plan
Mobile
(MHz)
Base
(MHz)
763
793
803
773
797
767
Mobile
(MHz)
Base
(MHz)
Narrow Band
6.25KHz Channels
Wide Band
50KHz Channels
805
775
Narrow Band
6.25KHz Channels
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CSI SMR 800 Filter File Naming Convention
Single Channel Block Filter File Name Example
sp9-81-0
SMR 800 band, P25 Modulation, Uplink
Start Freq of 806.1000 MHz, Uplink Stop
Freq of 807.0125 MHz, Downlink Start
Freq of 851.1000 MHz, Downlink Stop
Freq of 852.0125 MHz with standard
guard band.
Band
ID
Modulation
ID
Start Channel
Number (see formula)
End Channel
Number (see formula)
Dash Indicates That
All Channels between
Start and Stop Are
Included
Separator
Variant
Designator
sp9-81_1201-1281-0
Multi Channel Block Filter File Name Example
SMR 800 band, P25 Modulation, 1st
Channel Block Uplink Start Freq of
806.1000 MHz, 1st Channel Block
Uplink Stop Freq of 807.0125 MHz,
1st Channel Block Downlink Start
Freq of 851.1000 MHz, 1st Channel
Block Downlink Stop Freq of
852.0125 MHz, 2nd Channel Block
Uplink Start Freq of 821.1125 MHz,
2nd Channel Block Uplink Stop Freq
of 822.0125 MHz, 2nd Channel
Block Downlink Start Freq of
866.1000 MHz, 2nd Channel Block
Downlink Stop Freq of 867.0125
MHz with standard guard band.
Band
ID
Modulation
ID
Start Channel
1st Block (see formula)
End Channel
1st Block (see formula)
Underscore Indicates
the Gap Between
Channel Blocks
Start Channel
2nd Block (see formula)
End Channel
2
nd
Block (see formula)
Notes:
1. s = SMR 800 Public Safety Band
2. p = P25 Modulation
3. See the formulas to correlate
frequencies to the channel
numbers used in this file name
convention.
4. CSI DSP II repeaters are capable of up
to four channel blocks in one file
configuration.
To determine frequency from channel number use one
of the following formulas:
For DL Start: (Channel # x 0.0125) + 850.9875 = Frequency
For DL Stop: (Channel # x 0.0125) + 851.0000 = Frequency
For UL Start: (Channel # x 0.0125) + 805.9875 = Frequency
For UL Stop: (Channel # x 0.0125) + 806.0000 = Frequency
DSP II Public Safety 800MHz Band Plan
Mobile
(MHz)
Base
(MHz)
851
806
815
860
809
854
Mobile
(MHz)
Base
(MHz)
824
869
NPSPAC
(Public Safety)
Public Safety
B/ILT
Non-Cellular SMR
816
861
Expansion
Band
Guard
Band
817
862
ESMR
800 MHz Filter Naming Convention and Band Plan
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Functional Overview
CSI digital repeaters incorporates the following features for convenient operation, access,
protection, and control.
• Network Configuration and Control using either a webpage style GUI through
any standard browser or a menu driven user interface using the serial port.
Note: GUI does not require Internet access.
• User Gain Control (affects all passbands)
• Automatic Gain Control
• Automatic Power Control
• Oscillation Protection
• Over Drive Protection (P.A. limiting)
• Under/Over Voltage Protection
• Fault Protection
• Alarm Notification - Local/Remote
• 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
LED Indicator
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:
When a boot up is complete and no alarm conditions exist, the LED indicator will be illuminated green.
Should a fault condition develop the LED will illuminate red and the user may check the status page
of the GUI for the nature of the fault.*
*Note: During Power up, the repeater will require a approximately three minutes for
the internal computer to boot up. During this time the LED on the front panel may light
and go out several times.
Do not unplug the unit while it is in the boot up process!
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Local Communication Interface Ports
To allow monitoring and control, the repeater is equipped with four ports that provide external
communication access (1 Ethernet CAT-5, 2 DB-9 serial, and 1 USB). The Ethernet, CAT-5 port
is provided as a primary communications port to the PC. One serial interface provides communications to local PC and the second to an external modem when provided. The USB interface
provides a means to download files from a memory device and may also be used by an
external modem. The DB-9 pin assignments conform to the standard Electronic Industries
Association (EIA232) specification. A diagram of the pin descriptions is provided on this page
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). See
command line interface section for further detail.
EIA232 Pin Specifications
The diagram above is for reference only, it’s intended to provide a quick source for pinout
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.
USB Interface
The Universal Serial Bus (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.
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.
Monitoring & Alarms
There are no physical connections provided to specifically communicate system or alarm
status. This information is embedded in the information accessible via the communication
ports described earlier.
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1:1 PORT CONFIGURATION
Input: One single band duplex port, from the dual band donor.
Output: One single band duplex port to the DAS.
System Set-Up Considerations
All cables should be checked for shorts and opens. Also verifiy 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 cell site he or 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.
Selection of external attenuators to be used in line with the Antenna Port(s):
DONOR PORT
If a CSI-DSP85 is installed in an area with very strong desired and/or undesired signals, it is important to ensure that the overall signal levels are
optimized to be within the best operating range of the repeater. Additionally, de-sensing of a nearby base station site must be avoided. These goals
can be accomplished by properly attenuating the antenna port(s) in the path of the donor antenna(s). In effect, one can imagine that the particular
repeater deployment is electrically moved farther from the base station using attenuators that are equivalent to increasing the path loss from the
donor antenna to the base station. The following potential outcomes result from the use of attenuators on the donor port(s) of the CSI-DSP85: Uplink
output power, as reported by the CSI-DSP85, is reduced by the value of the attenuation, protecting nearby base stations. Downlink signal to noise
ratio is high at the point of the attenuator, resulting in slight but negligible reduction in downlink performance. Other performance is essentially
unchanged.
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SERVER PORT
Server port attenuation may also be necessary , particularly where a powered DAS is present. The selection guidelines below apply to both server
and donor ports. In order to properly measure uplink signal strength, a signal generator should be used. If a signal generator is not available, placing
a test call while under the server antenna with the least path loss to the repeater should provide reasonable data.
The following potential outcomes result from the use of attenuators on the server port(s) of the CSI-DSP85: Downlink output power, as reported
by the CSI-DSP85, is reduced by the value of the attenuation. Uplink incoming power from the DAS is reduced, along with potentially strong and/
or harmful out-of-band signals (including noise) that are generated by the DAS.
Attenuator Selection Guidelines
Accurate attenuator values need to be chosen to ensure that the maximum total power (higher of Composite or In-Band Input) applied to the donor
and server port(s) does not exceed the following thresholds:
-44.3 dBm 84 dB -31.4 dBm 68 dB
<-45 dBm 85 dB -32.2 dBm 69 dB
-43.6 dBm 83 dB -30.6 dBm 67 dB
-42.9 dBm 82 dB -29.8 dBm 66 dB
-42.2 dBm 81 dB -29 dBm 65 dB
-41.5 dBm 80 dB -28.2 dBm 64 dB
-40.6 dBm 79 dB -27.4 dBm 63 dB
-39.7 dBm 78 dB -26.6 dBm 62 dB
-38.8 dBm 77 dB -25.8 dBm 61 dB
-37.9 dBm 76 dB -25 dBm 60 dB
-37 dBm 75 dB -24.4 dBm 59 dB*
-36.2 dBm 74 dB -23.8 dBm 58 dB*
-35.4 dBm 73 dB -23.2 dBm 57 dB*
-34.6 dBm 72 dB -22.6 dBm 56 dB*
-33.8 dBm 71 dB -22 dBm < 55 dB*
-33 dBm 70 dB
*We recommend padding this level due to potential for fluctuating signal.
-25 dBm is the maximum input signal level that should be applied to the repeater, even if the gain is lower than 55 dB.
Input signals exceeding these thresholds will result in composite input attenuation, called “ADC Protect” (Analog to Digital Converter Protection).
Output power is reduced whenever the above thresholds are exceeded by reducing the gain by 1dB for each 1 dB that the threshold is exceeded.
ADC Protect should not be confused with AGC (Automatic Gain Control), which reduces gain to prevent In-Band (measured) output power from
exceeding the specified maximum output level. T o determine the total power applied to the donor and server port s, please reference the “Composite
Input” values as reported in the Web (“System Status”) or Menu (“Link Status”) interfaces (depicted and explained later in this manual).
Input Signal Max Gain Input Signal Max Gain
Large delta’s between in-band and composite input signals:
Care should be taken to isolate the best donor site to ensure the least possible delta between in-band and composite downlink signals. If the
(downlink) composite input exceeds the in-band input by more than 3 dB for the SMR band the maximum output power will be reduced.
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Mounting the Digital Repeater
The following diagrams illustrates the methods for mounting the repeater(s) in a typical wall or rack installation.
Brackets are provided for both options.
Rack mount of the repeaters requires just two brackets mounted to the front corners of each module. Note: the CSI digital repeaters
must be supported in the rack system with a shelf or slide rail. Do not rely on the brackets exclusively to support all the
weight of the modules.
Mount the Cross Band Coupler on the wall close enough
to the repeater modules to allow the RF jumpers to reach
from the CBC to the repeaters. The attachment system
used to anchor the CBC to the wall must be able to
support at lease 4.2 lbs / 1.9 kg.
The wall anchoring system you use for the repeaters
will need to be able to support at lease 19.6 lbs/ 8.9 kg
for each dual band module and 11.6 lbs/ 5.3 kg for
each single band add on module. The power supplies
are mounted approximately as shown.
Interconnection of the repeaters in the rack or wall mount configuration requires the short RF Jumpers supplied with the CBC
Module. The actual interconnections will depend on the bands and cross band coupler module being used. Contact Cellular
Specialties Support Line at: (603) 626-6677, Toll Free (USA) 1-877-844-4274 should you have questions about you specific
application.
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