Westell CSI DSP85201CP Users Manual

CSI-DSP85-C/P , CSI-DSP85I-C/ P &
CSI-DSP85-201-C/P Installation Manual

Table Of Contents

Product Registration Information ........................................4

Document Purpose/Intended Users ....................................4

Application ......................................................................4

Safety Guidelines and Important Safety Information..............4-5

Terms Used in This Manual ...............................................5

Product Introduction .........................................................5

DSP Band Plan and Filter Naming Convention .......6-7

Functional Overview .............................................8

LED Indicators ....................................................8-9

Local Communications Interface Ports .....................10

Pin-out Chart .....................................................10

USB Interface .....................................................10

Ethernet .............................................................10

Monitoring & Alarms ............................................10

System Set-Up Considerations ............................11-12

Mounting the Repeater.........................................13

Optional Accessories ......................................................14

Important Installation Notes ............................................ 14

Circuit Description ........................................................ 14

Function Block Diagram .....................................15

Mechanical Specifications ..................................16

AC Power Specifications ....................................16

Operating Power Parameters ..............................17

Environmental Requirements ...............................17

Mechanical Drawing .......................................................18

Web Base GUI Session .................................................19-26

Text Menu Interface (Local Access,) ................................27-31

T elnet Session (Remote Access, Login Required) .............31-33

Modem Interface (Remote Access with Login) .................33

Additional Tips ..............................................................33-35

Product Warranty ..........................................................36

FCC Information ............................................................36

Index.............................................................................37

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 DATE OF PURCHASE

POINT OF SALE COMP ANY

DISCLAIMER: All information and statements contained herein are accurate to the best of the knowledge of Cellular Specialties,
Inc. (CSI), but Cellular Specialties 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 DSP85-C/P or DSP85I-C/P 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: [phone], Toll Free (USA) 1-877-844-4274 .

-4-

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 20 cm (~8.0 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.

T erms used in this manual

AGC= Automatic Gain Control ERP= Effective Radiated Power
APC= Automatic Power Control FCS= Feedback Cancellation System
AUI= Attachment Unit Interface FPGA= Field Programmable Gate Array

CPU= Central Processing Unit LED= Light Emitting Diode
CSI= Cellular Specialties, Inc. OIP3= Third-Order Intercept Point

DAS= Distributed Antenna System RF= Radio Frequency

DHCP= Dynamic Host Configuration SBC= Single Board Computer
Protocol SNMP= Simple Network Management Protocol

DSP= Digital Signal Processing TMI= Text Menu Interface
EEPROM= Electrically Erasable USB = Universal Serial Bus

Programmable read- UHCI = Universal Host Controller Interface
only Memory

Product Introduction

Cellular Specialties, Inc. (CSI) developed the DSP85 and DSP85I 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 CSI DSP
Repeater amplifies both the “uplink” (phone to tower) & “downlink” (tower to phone) 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 com 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 st atus, 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 Cellular and PCS band plans as well as the
convention CSI uses to identify and store the files that make up the filter set. All DSP85-C/P and
DSP85I-C/P 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.

- 5 -

Cellular Freq ue n cy B an d P lan

Uplink

(MHz)

Downlink

(MHz)

Uplink (MHz)

794

764

1850

806

776

Public
Safety

UL 794-806
DL 764-776

806

851

SMR 800

iDEN

UL 806-821
DL 851-866

824

SM800

UL 821-824
DL 866-869

821

866

A”

UL 824-825
DL 869-870

869

825

870

A

UL 825-835
DL 870-880

835

880

B

UL 835-845
DL 880-890

UL 845-846.5
DL 890-891.5

845

846.5

890

891.5

B’A’

UL 846.5-849
DL 891.5-894

849

896 901

894

935 940

SMR 900

UL 896-901
DL 935-940

PCS Frequency Band Plan

1865 1870 1885 1890 1895 1910

Downlink (MHz)

1930

UL 1850-1857.5
DL 1930-1937.5

A3

UL 1850-1855
DL 1930-1935

A7 A9

A6

UL 1850-1852.5
DL 1930-1932.5

UL 1852.5-1855
DL 1932.5-1935

UL 1855-1857.5
DL 1935-1937.5

UL 1850-1865
DL 1930-1945

A2

A Full

A4

UL 1855-1860
DL 1935-1940

A8

UL 1857.5-1860
DL 1935-1937.5

UL 1860-1862.5
DL 1940-1942.5

UL 1862.5-1865
DL 1942.5-1945

A1

UL 1857.5-1865
DL 1937.5-1945

A5

UL 1860-1865
DL 1940-1945

A10

1945 1950 1965 1970 1975 1990

B Full

UL 1870-1885
DL 1950-1965

C Full

UL 1895-1910
DL 1975-1990

B1B2

A11

UL 1870-1872.5
DL 1950-1952.5

UL 1872.5-1875
DL 1952.5-1955

D Full

UL 1865-1870
DL 1945-1950

D1

D2

UL 1870-1877.5
DL 1950-1957.5

B3

UL 1870-1875
DL 1950-1955

B7 B9

B6

UL 1870-1872.5
DL 1950-1952.5

UL 1872.5-1875
DL 1952.5-1955

UL 1875-1877.5
DL 1955-1957.5

B4

UL 1875-1880
DL 1955-1960

B8

UL 1877.5-1885
DL 1957.5-1965

B5

UL 1880-1885
DL 1960-1965

B10

UL 1877.5-1880
DL 1957.5-1960

UL 1880-1882.5
DL 1960-1962.5

UL 1882.5-1885
DL 1962.5-1965

B11

E Full

UL 1885-1890
DL 1965-1970

E1

E2

UL 1885-1887.5
DL 1965-1967.5

UL 1887.5-1890
DL 1967.5-1970

F Full

UL 1890-1895
DL 1970-1975

F1

F2

UL 1890-1892.5
DL 1970-1972.5

UL 1892.5-1895

DL 1972.5-1975

UL 1895-1902.5
DL 1975-1982.5

C3

UL 1895-1900
DL 1975-1980

C7 C9

C6

UL 1895-1897.5
DL 1975-1977.5

UL 1897.5-1900
DL 1977.5-1980

UL 1900-1902.5
DL 1980-1982.5

C4

UL 1900-1905
DL 1980-1985

C8

UL 1902.5-1910
DL 1982.5-1990

UL 1902.5-1905
DL 1982.5-1985

UL 1905-1907.5
DL 1985-1987.5

UL 1907.5-1910
DL 1987.5-1990

Note: All frequencies are shown in MHz

C1C2

C5

UL 1905-1910
DL 1985-1990

C11

C10

-6 -

Note: Filter file names will be from six to twelve characters long. Each character position in the filter file name is
used to define the characteristics of the filter as shown above. All frequencies are shown in MHz

- 7-

Functional Overview

The CSI-DSP85-C/Pand CSI-DSP85I-C/P 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 Indicators

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:

- 8 -

Alarm: Indicated by a red LED. The unit has sensed an alarm condition. This LED may

AGC: When Illuminated, this yellow LED indicates that automatic gain control is active

UL PWR: Indicated by a red LED. Uplink power has been affected by a system event and

DL PWR: Indicated by a red LED. Downlink power has been affected by a system event

OSC: Indicated by a red LED. An oscillation event has occurred or is occurring. The

SHUT DWN: Indicated by a red LED. The RF stages of the unit are disabled due to an

D/L SIGNAL
STRENGTH: Indicated by a green LED bargraph. This indicates the relative signal strength

light alone or in conjunction with one of the other indicator LEDs. In both cases the
cause(s) can be reviewed by going to the System Health menu.

and has reduced the gain of the unit in order to prevent very strong input
signals from overloading the amplifier. The amplifier will periodically evaluate
input signal and attempt to recover from this condition.

will need to be addressed by either the system software or a technician to
be reset to original system settings, using the GUI or text menu interface.
See the event log to determine the nature of the fault.

or condition, such as insufficient antenna isolation, and will need to be
addressed by either the system software or a technician to be reset to original
system settings, using the GUI or menu driven user interface. See the event log
to determine the nature of the fault.

system has been affected by the event and the problem will need to be
addressed by the system software or a technician to be reset to original system
settings. This is an indication of a major fault.

unresolved system event such as oscillation, effectively taking the unit off the
air. The problem will need to be addressed by a technician before the on air
operation can be restarted. The repeater is not equipped with an ON/OFF
power switch. Hard power down will require that the unit be unplugged.

being received from the cell site. Note: the last bar of the bargraph will turn
red in the event of very strong adjacent channel interference.

Approximate Signal Strengths of Bargraph Display

The minimum measurable input level is -81 dBm at 85 dB gain, -71 dBm at 75 dB gain,

-61 dBm at 65 dB gain, and -51 dBm at 55 dB gain.

ILLUMINATED
BARS

10

9
8
7
6
5

4
3

2
1

0*

*Note: During Power up, the repeater will require a approximately three minutes for

the internal computer to boot up. During this time the LEDs on the front panel will light
and go out several times. When boot is complete and no alarm conditions exist, none

of the LED indicators will be illuminated. The CSI logo is illuminated when ever the
repeater is powered. One or more bars on the LED bargraph may also be lit,
depending on the strength of the signal being received from the donor site. Signals
weaker than -81dBM will not illuminate any bars.

Do not unplug the unit while it is in the boot up process!

SIGNAL A T INPUT
CONNECTOR

Adjacent Channel
Interference

-54dBm to -51dBm

-58dBm to -55dBm

-62dBm to -59dBm

-66dBm to -63dBm

-70dBm to -67dBm

-74dBm to -71dBm

-78dBm to -75dBm

-81dBm to -79dBm
< -81 dBm

- 9 -

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.

- 10 -

System Set-Up 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 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 CSI-DSP85 Antenna
Port(s):

CELL

TO INSIDE AN T E NNA

COM PC S

TO OUTSIDE ANTENNA

CELL COM PCS

2:1 PORT CONFIGURATION

Input: Two single band duplex ports, one from the cell donor

Input: One dual band duplex port from the dual band donor.

TO INSIDE A NTENNA

CELL COM P CS

TO OUTSIDE ANTENNA

1:2 PORT CONFIGURATION

COMCELL

PCS

and one from the PCS donor.

Output: Two single band duplex ports one to the Cellular DA S a nd

Output: One dual band duplex port to the DAS.

TO INSIDE AN T E NNA

CELL COM PC S

CELL

TO OUTSIDE ANTENNA

COM PCS

1:1 PORT CO NFIGU RA TION

Input: One dual band duplex port, from the dual band donor.
Output: One dual band duplex port to the DA S.

one to the PCS D AS .

TO INSIDE A NTENNA

CELL COM PCS

TO OUTSIDE ANTENNA

CELL COM

PCS

2:2 PORT C ON FIGU RATION

Input: Two single band duplex ports, one from the cell donor and
one from the PCS donor.

Output: Two single band duplex ports one to the Cellular DAS and

DONOR PORT

If a CSI-DSP85-C/P or CSI-DSP85I-C/P 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 repeater: Uplink
output power, as reported by the unit, 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.

one to the PCS D AS .

-11 -

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 repeater: Downlink
output power, as reported by the unit, 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 In­Band Input) applied to the donor and server port(s) does not exceed the following thresholds:

Input Signal Max Gain Input Signal Max Gain

<-45 dBm 85 dB -32.2 dBm 69 dB

-44.3 dBm 84 dB -31.4 dBm 68 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.
To determine the total power applied to the donor and server ports, 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).

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 Cellular, or more than 5 dB PCS, the maximum
output power will be reduced. Example:
Band 1 (Cellular)
In-Band Input -45 dBm
Composite Input -33 dBm
Max Gain = 70 dB
Max Output = 25 dBm

-12-

Wall Mounting the Digit al Repeater

The following diagram illustrates the best method for mounting the repeater to a wall in a typical installation. Note: for
optimal cooling the unit should be mounted vertically on a wall with the antenna ports up.

ITEM # QTY PART # DESCRIPTION

1 1EA C S10-38x-403** DSP85-C/P REPEATE R O R

OR CS10-40x-403** DSP85I-C/P REPEATER

2 1EA 015-2096-001 5V /24V PO W E R S UP PLY
3 1EA 750-2171-001 M O U N TING P LATE (OPT IONA L)

WILL VARY WITH PORT

** "x"

CONFIGURATION ORDERED

Warning: Power supply cable connector is keyed for proper orientation

and is designed to lock into place.

Keyed for proper
alignment, do not
force connector
into place.

- 13 -