Westell CSI DSP85 PS7 Users Manual

CSI-DSP85-PS7/ CSI-DSP85N-PS7
&
CSI-DSP85-PSS8/CSI-DSP85N-PSS8
Installation Manual

Table of Contents

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

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

Safety Guidelines................................................................................................................................................................. 4

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

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

LED Indicators ..................................................................................................................................................................... 8

Local Communication Interface Ports ............................................................................................................................... 9

Approximate Signal Strengths of Bargraph Display ......................................................................................................... 9

Ethernet................................................................................................................................................................................ 9

EIA232 Pin Specifications ................................................................................................................................................... 9

USB Interface....................................................................................................................................................................... 9

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

System Set-Up Considerations ........................................................................................................................................ 10

Selection of external attenuators to be used in line with the Antenna Port(s) ............................................................. 10

DONOR PORT ......................................................................................................................................................................11

SERVER PORT .....................................................................................................................................................................11

Attenuator Selection Guidelines........................................................................................................................................11

Wall Mounting the CSI-DSP85, Digital Repeater (Standard Model)................................................................................ 12

Wall Mounting the CSI-DSP85N, Digital Repeater (Weather Resistent Model) ............................................................. 13

Dry Contact Terminal......................................................................................................................................................... 14

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

Circuit Operational Description ........................................................................................................................................ 15

Important Installation Notes ............................................................................................................................................. 15

Functional Block Diagram ................................................................................................................................................. 15

Mechanical Specifications, Weather Resistent Model................................................................................................... 16

Mechanical Specifications, Standard Model ................................................................................................................... 16

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

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

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

Mechanical Drawing, Standard Model ............................................................................................................................. 18

Mechanical Drawing, Weather Resistent Model ............................................................................................................. 19

System Status: .................................................................................................................................................................. 20

Web based GUI Session.................................................................................................................................................... 20

Local Network:................................................................................................................................................................... 21

Program a Filter: ................................................................................................................................................................ 22

RF Configuration: ............................................................................................................................................................... 22

Remote Network:............................................................................................................................................................... 23

SNMP Configuration: ......................................................................................................................................................... 23

Install & Upload: ................................................................................................................................................................. 24

System Health:................................................................................................................................................................... 24

Reboot: ............................................................................................................................................................................... 25

Alarm Configuration: ......................................................................................................................................................... 25

E-mail Configuration: ......................................................................................................................................................... 25

Log Configuration: ............................................................................................................................................................. 26

Text Menu Interface (Local Access) ................................................................................................................................ 26

T erminal Emulation Program............................................................................................................................................ 27

Terminal Emulation Set-up................................................................................................................................................ 28

TMI Login ............................................................................................................................................................................ 29

Telnet Session (Remote Access)..................................................................................................................................... 31

Telnet Session Login......................................................................................................................................................... 32

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

Additional Tips ................................................................................................................................................................... 34

Suggested spectrum analyzer setting:............................................................................................................................ 36

RF Notes: ............................................................................................................................................................................ 36

Industry Certifications/Registration Numbers:................................................................................................................ 37

Index................................................................................................................................................................................... 38

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: [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 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.

- 5 -

700 MHz Filter Naming Convention and Band Plan

CSI Public Safety 700 MHz Band Filter File Nam ing Convention

Band

ID

Channel

Width ID

Single Channel Block Filter File N am e Exam ple

Public Safety 700 MHz band, 6.25 KHz
Cann els, Uplink Start Freq of 794.0500 M H z,

7n9-168-0

Uplink Stop Freq of 79 5.0500 MH z, Dow n link
Start Freq of 764.0500 M H z , Dow nlink Stop

Start Channel

Number

(see formula)

Freq of 765.050 0 M H z w ith standard guard
band.

Dash In d ic a t e s Tha t

All Channels between

Start and Stop A re

End C h annel

Number

(see formula)

Separator

Variant

Designator

Included

Band

ID

Chan nel

W idth ID

Multi Ch annel Blo ck Filter File Name Exam ple

7w 2-21_101-120-0

Start Channel

st

1

Block (see form ula)

End Channel

st

1

Block (see form ula)

Un de rs cor e Ind ic ates

the Gap Betwe en

Channe l Blocks

To determine frequency from channel numb er use one o f the following formulas:

For NBDL Start
For NBDL Stop
For NBUL Start
For NBUL Stop

: (Channel # x 0.00625) + 763.99375 = Frequency
: (Channel # x 0.00625) + 764.0000 = Frequency
: (Channel # x 0.00625) + 793.99375 = Frequency
: (Channel # x 0.00625) + 794.0000 = Frequency

Start Channel

nd

2

Block (see formula)

nd

2

End Channel
Block (see formula)

Public Safety 700 M H z b and , 50
KHz Channels, 1
Uplink Start Freq of 797.0500

st

MHz, 1

Channel Block Uplink
Stop Freq o f 798.0500 MHz , 1
Chann el Block Do w nlink Start
Freq of 767.0500 M H z, 1
Chann el Block Do w nlink Stop
Freq of 768.0500 M H z, 2
Chann el Block Up link Start Freq
of 802.0000 M H z , 2
Block Uplink Stop Freq of

803.0000 M Hz, 2
Downlink Start Freq of 772.0000

nd

MHz, 2

Channe l Block Downlink

st

Channe l Block

st

nd

nd

Channel

nd

Chann el Block

st

Stop Freq o f 773.0000 MHz w ith
standard guard band.

For WBDL Start
For WBDL Stop
For WBUL Start
For WBUL Stop

Mobile

(MHz)

793

763

Base

(MHz)

: (Channel # x 0.05) + 766.95 = Frequency
: (Channel # x 0.05) + 767.0000 = Frequency
: (Channel # x 0.05) + 796.95 = Frequency
: (Channel # x 0.05) + 797.0000 = Frequency

797

Narrow Band

6.25KHz Channels

Wide Band
50KHz Chan nels

767

D S P II P u b lic S a fe ty 7 00MHz B a n d P la n

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 .

803

Mobile

(MHz)

805

Narrow Band

6.25KHz Channels

773

- 6-

775

Base

(MHz)

800 MHz Filter Naming Convention and Band Plan

CSI SMR 800 Filter File Naming Convention

Band

ID

Modulation

ID

Sin g le Ch a n ne l Blo c k F ilte r F ile N a me E x a mp le

sp9-81-0

Start Ch an ne l

Number

(see formula)

Dash In dica tes T ha t

All Channels between

Start and Stop Are

End Channel

Number

(see formula)

Separator

Included

Band

ID

Mo du lation

ID

Mu lt i C h a n n e l Bloc k F ilte r F ile Name Examp le

sp9-81_1201-1281-0

Start Channel

st

Block (see formula)

1

End C h an nel

st

Block (see formula)

1

Unde r sco re In d icate s

the G ap B e tw ee n

Channel Blocks

To determine frequency from channel number use one
of the following formu las:

For DL Start
For DL Stop
For UL Start
For UL Stop

Mobile

(MHz )

806

: (Channel # x 0.0125) + 850.9875 = Frequency
: (Channel # x 0.0125) + 851.0000 = Frequency
: (Channel # x 0.0125) + 805.9875 = Frequency
: (Channel # x 0.0125) + 806.0000 = Frequency

809

Start Channel

nd

Block (see formula)

2

nd

2

End C h an nel

Block (see formula)

815

816

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.

Variant

Designator

SMR 800 band, P25 Modulation, 1st
Channel Block Uplink Start Freq of

806.1000 MHz, 1
Uplink Stop Freq of 807.0125 MH z,

st

Channel Block Downlink Start

1
Freq of 851.1000 MHz, 1
Block Downlink Stop Freq of

852.0125 MHz, 2
Uplink Start Freq of 821.1125 MHz,

nd

Channel Block Uplink Stop Freq

2
of 822.0125 MHz, 2
Block Downlink Start Freq o f

866.1000 MHz, 2

st

Channel Block

st

Channel

nd

Channel Block

nd

Channel

nd

Channel Block
Downlink Stop Freq of 867.0125
MHz with standard guard band.

Notes:

1. s = S MR 80 0 P u blic S a fe ty Band

2. p = P25 Modulation

3. See th e fo rm u las to cor rela te
frequen cie s to th e ch an n el
numb er s us e d in th is file name
conven tion.

4. CSI DSP II repeaters are capable of up
to four channe l blocks in one file
configura tion.

817

Mobile

(MHz )

824

NPSPAC
(Pu b lic S afe ty)

851

Base
(MHz )

Public Sa fety
B/ILT

Expansion

Band

Guard

Band

Non-C e llu la r SM R

854

860

861

ESMR

862

DSP II Public Safety 800MHz Band Plan

- 7 -

869

Base

(MHz )

Functional Overview

The CSI-DSP85 repeater 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 overdriven 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:

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

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.

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

the air. The problem will need to be addressed by a technician before the on

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

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 ystem
settings. This is an indication of a major fault.

unresolved system event such as oscillation, effectively taking the unit off
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.

-8-

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

SIGNAL AT 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

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!

Local Communication Interface Ports

To allow monitoring and control, the CSI-DSP85-PSS8 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 to the left 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.

- 9 -

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.

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 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
CSI-DSP85-PSS8 for providing coverage to these sites.

Selection of external attenuators to be used in line with the Antenna Port(s)

TO INSIDE ANTENNA

TO OUTSIDE ANTENNA

1:1 PORT CON FIGURATION

STANDARD MODEL

Input: One single band port, from the single band donor.

Output: One single band port to the DAS.

TO INSID E ANTENNA TO OUTSIDE ANTENNAUSB ETHERNET POWER

CCNCNO

1:1 PORT CONFIGURATION
WEA TH ER RESISTAN T M O DEL

Input: On e single band port, from the single band donor.

Output: One single band port to the DAS.

MOUNTING BRACKET

- 10 -

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.

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).

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. Example:
Band (SMR)
In-Band Input -45 dBm
Composite Input -33 dBm
Max Gain = 70 dB
Max Output = 25 dBm

Input Signal Max Gain Input Signal Max Gain

- 11 -

Wall Mounting the CSI-DSP85, Digit al Repeater (S t andard Model)

The following diagram illustrates the best method for mounting the repeater to a wall in an 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 CS10-38X-4XX** DSP85 REPEATER
2 1EA 453-1010-002 5V/24V POWE R SUPPLY
3 1EA 780-0510-001 LINE CORD (AC POWE R)
4 1EA 750-2171-001 MOUNTING PLATE (OPTIONAL)
5 1EA 750-2172-002 P/S MOUNTING BRACKET

WILL VARY WITH MODEL

**"X"

AND BAND ORDERED

-12-