Shyam RF/DBR Series, DB6MR20 Operation & Installation Manual

5920 0060 200 December 2008

Next Generation Sig n a l Enha ncement

RF / DBR Series

OOPPEERRAATTIIOONN && IINNSSTTAALLLLAATTIIOONN MMAANNUUAALL

Six Sub-Band Repeaters for In-Door Applications

DDBB66MMRR2200 (

(Dual Band)

FCC ID:S3CDB6MR20 IC: 5751A-DB6MR20

The information contained herein is proprietary to Shyam Telecom Limited. Unauthorized acces s, copy and repl icati on are prohibit ed. This do cument must not be copied in whole or part by any means or it shall not be disclosed or divulged to any third Party without the prior written consent of Shya m Telecom Limi ted.

Proprietary In forma tion

Contents

1. Document History.........................................................................................4

2. Disclaimer...................................................................................................... 5

3. Safety Instructions and Warnings...............................................................5

3.1. Personnel Safety......... ...... ...... ...... ....... ...... ...... ....... ...... ......................... .5

3.2. Equipment Safety........ ...... ...... ...... ....... ...... ......................... ...... ...... ....... .5

3.3. Electrostatic Sensitivity......................... ...... ...... ...... ...... ....... ....................6

4. Introduction...................................................................................................7

4.1. Purpose................ ....... ...... ...... ...... ......................... ....... ...... ...... ...... ....... .7

4.2. Scope . ...... ...... ...... ....... ...... ...... ...... ....... ...... ...... ......................... ...... ....... .7

4.3. Definitions . ...... ....... ...... ...... ......................... ...... ....... ...... ...... ...... ....... .......7

4.4. References........... ...... ....... ...... ....... ...... ......................... ...... ...... ....... ...... .8

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4.5. General ..... ...... ...... ....... ......................... ...... ...... ...... ....... ...... ....................8

5. Functional Description of DB6MR20 Repeater...........................................9

5.1. General Description........... ...... ...... ....... ...... ......................... ...... ...... ....... .9

5.2. Typical In-Building Coverage.................................................................11

6. To Get started-Basic Software Control of the System.............................14

6.1. General ..... ...... ...... ....... ......................... ...... ...... ...... ....... ...... .................. 1 4

6.2. Terminal Set-up.............................. ...... ......................... ...... ...... ....... .....14

6.3. Block Diagram Description ....................................................................24

7. DB6MR20 Repeater Specifications............................................................26

7.1 Specification-RF .....................................................................................26

7.2. Electrical Specification Power Requirement........... ...... ....... ...... ....... .....26

7.3. External Electrical Interface...................................................................27

7.4. Mechanical Specification................ ...... ...... ...... ....... ........................ ......27

7.5. Environmental Specification ............................. ...... ....... ........................27

7.6. Contents of Delivery ..............................................................................27

8. Installation...................................................................................................28

8.1. Preparation Sheet-Pre Installation.........................................................28

8.2. Engineering Consideration ............................... ...... ....... ...... ...... ............2 9

8.3. Installation Tools... ....... ...... ...... ...... ....... ...... ...... ...... ....... ...... ...... ............3 1

8.4. Installation Procedure.. ...... ...... ....... ...... ...... ...... ....... ...... ...... ...... ............3 2

8.5. Gain Settings.. ....... ...... ...... ...... ......................... ...... ....... ...... ...... ...... ......33

8.6. Commissioning........................ ......................... ...... ....... ...... ...... ...... ......34

8.7. Checklist – Post Installation..... ...... ...... ....... ...... ....... ...... ...... ...... ....... .....35

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8.8. Dos & Don’t Dos...................... ...... ....... ...... ...... ...... ....... ........................36

8.9. Display Details of DB6MR20 .................................................................37

9. System Maintenance...................................................................................38

9.1. General ..... ...... ...... ....... ......................... ...... ...... ...... ....... ...... .................. 3 8

9.2. Preventative Maintenance.............. ...... ...... ...... ....... ......................... .....38

9.3. In-Building Coverage Problems........................ ...... ....... ...... ...... ...... ......38

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1. Document History

Document Number

5920 0060 2 00 DB6MR20

Document Name

Repeater

Date Compiled

by

December

Inderjit Ramvir Singh

Approved by Revision

2008

Revision Revised Section Date

Intentionally Left Blank

2. Disclaimer

Every attempt has been made to make this material complete, accu rate, and up-to-date. Users are cautioned, however, that Shyam Telecom Limited reserves the right to make changes without notice and shall not be responsible for any damages inc luding consequentia l, caused by reliance of the contents presented, including, but not limited to, typographical, arithmetical, or listing errors.

Product name(s) referenced in this document may be trademarks or registered trademarks of their respective companies, and are hereby acknowledged.

In areas with unstable power grids (mains) all repeaters must be installed with a voltage regulator ensuring a constant voltage level at the repeater power input. A maxi mum voltage d eviation should remain within the input ran ge to the repeaters for warranty purposes.

All antennas must be installed with lighting protection. Damage to internal modules, as a result of lightning is not covered by the warranty.

All specifications are subject to change without prior notice.

3. Safety Instructions and Warnings

3.1. Personnel Safety

Before installing or replacing any equipment, the entire manual should be read and understood. The user needs to supply the appropri ate AC power to the Repeater. Inc orrect AC po wer s ettings can da mage the re pea ter an d may cause injury to the user.

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Throughout this manual, there are "Caution" warnings, "Caution" calls attention to a procedure or p ractice, whic h , if igno r ed, may res ult in i njur y or damage to the system or system component or even the user. Do not perform any procedure preceded by a "Caution" until the described conditions are fully understood and met.

3.2. Equipment Safety

When installing, replacing or using this product, observe all safety precautions during handling and operation. Failure to comply with the following general s afety precautions and with spec ific precautions described elsewhere in this manual violates the safety standards of the design, manufacture, and intended use of this product. Shyam Telecom Limited assumes no liability for the customer's failure to comply with these precautions. This entire manual should be read and understood before operating or maintaining the repeater system.

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CAUTION

It calls attention to a procedure or practice which, if not followed, may result in personal inj ury, damage to the sys tem or damage to indiv idual components. Do not perform any procedure preceded by a

CAUTION until described conditions are fully understood and met.

WARNING! This equipment complies with FCC & IC radiation exposure limits

set forth for an uncontrolled environment. This transmitter must not be colocated or operating in conjunction with any other antenna or transmitter. The signal booste r with server antenna must be installed to provide minimum 20 cm separation distance between the server an tenna and the body of user or near by person. The donor antenna used for this transmitter must be fixedmounted on outdoor permanent structures with a separation distance of at least 1.5 meters from all persons during normal operation.

The RF electric performance of the DB6MR20 repeater conforms to FCC requirement of the inter modulation and spurious emission. It avoids interference problems.

3.3. Electrostatic Sensitivity

CAUTION

ESD = ELECTROSTATIC DISCHARGE SENSITIVE DEVICE

Observe electrostatic precautionary procedures. Semiconduct or tra nsmitters and rece ivers prov ide highly rel iable per formance

when operated in co nformity with the intentions of their design. However, a semiconductor may be damaged by an electrostatic charge inadvertently imposed by careless handling.

Static electricity ca n be conducted to the semico nductor chip from the centre pin of the RF input connector, and through the AC connector pins. When unpacking and otherwise handling the Repeater, follow ESD precautionary procedures includin g the use of grounded wrist straps, grounded workbench surfaces, and grounded floor mats.

4. Introduction

4.1. Purpose

The purpose of this document is to describe the electrical and mechanical specifications, operation and maintenance of the DB6MR20 Repeater.

4.2. Scope

This document is the produc t description of the Shya m DB6MR20 Repeater for indoor applications.

4.3. Definitions AGC ALC APC BCCH BTS BSEL CDMA CMC CMB CSEL DCS DL

EGSM ETSI GSM LAC LED LNA LO MS MSC NMS PA PCN PCS PSU RF RMS RSSI RTC TACS TDMA UL (Uplink)

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Automatic Gain Control Automatic Level Control Automatic Power Control Broadcast Control Channel Base Transceiver Station Band Selective Coded Division Multiple Access Configuration & Monitoring Console software Combiner Unit Channel Selective Digital Communication System Downlink signal (from base station via repeater to mobile station) Extended Global System for Mobile Communication European Telecommunications Standard Institute Global System for Mobile communication Location Area Code of the BTS site Light Emitting Diode Low Noise Amplifier Local Oscillator Mobile Station Mobile Switching Center Network Management System Power Amplifier Personal Communication Network Personal Communication System Power Supply Unit Radio Frequency Remote Management System Received Signal Strength Indication Real Ti me Cl ock Total Access Comm unication System Time Division Multiple Access Uplink signal direction (from mobile station via repeater to base station)

4.4. References

[1] ETS 300 086.

Radio Equipment and Systems Land mobile service Technical characteristics and test conditions for radio equ ipment with an internal or external RF connector intended primarily for analogue speech.

[2] ETS 300 609-4.

Digital cellular telecommunications system (phase 2): Base Station Systems (BSS) equipment specification: Part 4: Repeaters.

[3] ETS 300 342-3

Radio Equipment and Systems (RES): Electro-Magnetic Compatibility (EMC) for European Digital Cellular Telecommunications systems. Base Station Radio and ancillary equipment and Repeaters meeting phase 2 GSM requirements.

4.5. General

Mobile Communicatio ns Systems are planned as cellula r systems and each cell of the base station is required to provide RF coverage over a certain geographical area as per defined RF power levels. Due to the RF propagation properties, even using high radiated RF powers or complicated antenna systems, there are zones within the coverage area where the RF signal strength from base station remains inadequate for establishing the desired connectivity to mobile users.

Repeaters tradit ionally are de plo yed in the Mob ile Communication Network to fill in the “Dead Zones” caused by blocking of signals by geographic topologies such as mountains, valleys, dense foliage, high rising urban landscapes and other man-made structures. The distance from the base station also adversely affects the RF signal strength. The user views repeaters as a means to extend base stati on coverage so as to reduce the number of base stations and thereby accelerate network availability.

Repeater syste ms are installed after meticulous planning b etween BTSs and the mobile users to provide RF coverage in the shadowed regi ons. Repeater systems are available for different applications and ultimate choice shall depend on some of the factors mentioned below:

• Area to be provided with coverage.

• Indoor/outdoor coverage.

• Availability of BTSs in the vicinity.

• Antenna isolation to be achieved.

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5. Functional Description of DB6MR20 Repeater

5.1. General Description

The DB6MR20 Repeater System is a designed to provide indoor coverage and can handle signals in up to six sub bands in two of the service bands, used around the World by various service operators. It provides highly selective amplific ation in the pre-set bands. The d etails of operating service frequency bands are given below:

S.NO. Service Band DL Frequency (MHz) UL Frequency (M Hz)

1. SMR 800

2. Cellular

3. SMR 900

4. EGSM

5. GSM 900

6. DCS

7. PCS

8. UMTS

*The certification for FCC ID:S3CDB6MR20 & IC:5751A-DB6MR20 is only applied to Cellular and PCS Band applicati ons.

851-866 806-821 869-894 824-849 935-941 896-902 925-960 880-915

935-960 890-915 1805-1880 1710-1785 1930-1990 1850-1910 2110-2170 1920-1980

The Customer i s advised to refe r to the stick er on th e repe at er unit givin g the details of frequency bands set & the bandwidths of different sub bands equipped in the repeater.

Salient Feature s

• The repeater has been designed to meet the requirement of users

who are allocated frequency spectrum in different bands. It is provisioned to be equipped up to six s ub bands maximum in both the bands with 3+3 configuration.

• The repeater adopts duplex mode and bi-directional amplificatio n for

UL & DL signals between the base station and mobile users. It has been designed for indoor applications to meet the requirements of large number of users in the targeted area.

• It conforms to ETSI standards & international safety

requirements.

• The system can be incorporated with optional Remote

Management System (RMS). It enables status monitoring, remote

configuration & speedy maintenance.

• The system is modular in nature & can be customized to meet

requirement of user in terms of number of sub bands with the desired

Ceiling

Antenna

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bandwidth of each. The System is incorporated with monitoring facility through USB port with easy GUI interface.

• It sucks signals from the BTS through a DONOR antenna (highly

directional outdoor antenna) and distributes the signals to mobile users after amplification through a set of indoor SERVER antenna(s) (omni/ directional) system in the DL.

• In the UL, the signals from the mobile users are picked up by

SERVER antenna and retransmitted to the BTS after processing & amplification in the repeater.

The repeater consists of the following modules/units:

• LNA

• Converters

Power amplifiers Power supply unit Quad-plexers filters for transmit/receive directions Supervisory module A metallic case houses the repeater. Provision is made for heat

dissipation especially for amplifiers, which generate more heat. The choice of suitable metal as the case material gives a lightweight design with good hea t conduction. It is not waterproo f and therefore, should be installed at indoor locations only.

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DB6R 20 unit

Figure 1: Typical In-building Coverage

5.2. Typical In-Building Coverage

The DB6MR20 repeater is designed to provide optimal coverage over an area of approximately 1,000 to 2,000 sq. meters (10,000 to 20,000 Sq ft.). However, ultimate performance depends on the obstructions blocking/absorbing o f the RF signals in si de the building and the available forward signal level at the donor antenna.

Typical coverage is usually plann ed for relatively small areas such as large conference rooms or several adjacent rooms in smaller office areas.

Coverage is primarily determined b y the available fo rward sign al level at the outdoor antenna input, loss due to the RF cable length, type of RF cable installed and achievable isolation for optimum DB6MR20 performance. Indoor coverage varies greatly due to the nature of various building construction techniques and materials. Approximations of signal level/coverage can be determined with the following assumptions:

• 10dBi to12dBi-donor antenna. Max. 9dBi indoor

omni/directional antenna.

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• Installed total cab le and connector loss of approx imately 5 dB

(125 feet of typical 1/2” coaxial foam cable).

• Interior building s tructure consists of typical vertical stud and

drywall composition.

• Isolation between th e do nor and server antennas should be 15

dB more than the gain of the repeater.

DB6R20 Repeate

r

Figure 2: Application of DB6MR20 in a multi-storey building

Ceiling

DB6MR20

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Antenna

Figure 3: Typical Indoor Cov erage Application in Train

6. To Get started-Basic Software Control of the System

6.1. General

The system is equi pped with a supervisory module tha t allows the monitoring and control of various parameters such as RF power, attenuation, temperature, status of door and alarm conditions etc.

The communication interface between the local terminal and the control module can be s et up using the Configuration & Monit oring Cons ole software (CMC), which is an easy to use GUI for simple control and monitoring. It enables monitoring of parameters & subsequent adjustment if required.

This function can be performed either us ing a terminal (PC/laptop) loc ally, or through remote login using the wireless modem (Optional) located in the repeater. USB port is provisioned in the equipment for connecting PC/laptop.

6.2. Terminal Set-up

The system is delivered with software loaded in order to perform configuration as per requirement. The lapto p/PC should be loaded with the CMC software available on the supplied CD along with the USB driver.

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Functions as described below are carried out through CMC software:

I) Login Repeater (Figure 4)

After running the Configuration & Monitoring Console (CMC), us er needs to login the repeater. To login the repeater:

• Click the “Login” on the command bar.

• Select the user type.

• Enter the password.

• Finally click the “OK”.

After successful login, a message “Logged in successfully” will be flashed on the screen. Now user can start the operation through CMC.

There are two types of users viz. ADMINISTRATOR and SUPERVISOR. If user logged i n as an ADMINISTRATOR, a ll th e op er at ion throu gh the CMC can be carried out. The password by default is “SHYAM”.

SUPERVISOR is allowed to perform monitor ing of the status & alarms but no change in configuration is permitted. However, the SUPERVISOR can change password if so desired.

Administrator can limit the system access authority of the SUPERVISOR.

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II) Configura tion

Configuration means setting different repeater parameters for proper

operation. Configuration of Shyam repeaters can be performed locally with a laptop / PC connected to the repeater by means of local USB serial interface cable. Clicking the CONFIGURE on the command bar, displays configuration window. This window allows access to all the configurable repeater parameters.

Repeater ID (Fi gure 5)

User can assign a unique repeater ID to eac h repeat er installed. Up to 10 characters are allowed for this field.

Repeater Location (Figure 5)

User can assign the address of l ocation where rep eater is installed. Up to 30 characters are allowed for this field.

UP Link/ DL Frequency (Figure 6)

The UL /DL frequency ranges are defined for all the equipped sub bands (Maximum up to six) depending on the bands being used.

Figure 4: Log-in Repeater

! SET: This is for updating the repeater parameters. ! READ: This is for reading configured parameters from repeater.

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Figure 5: Repeater ID/Loca tion Settings

Figure 6: Frequency Settings in sub bands

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Figure 7: Sub Band ON/OFF Settings

Sub Band ON/OFF Settings (Figure 7)

Depending on the number of sub bands equip ped, particular sub bands can be configured as “ON” & others “OFF”. Maximum six s ub ban ds can be equipped.

PA ON/OFF (Figure 8)

User can set UL and/or DL PA as ON or OFF independently for testing purpose at the time of installation.

After completing the installation it must be in ON condition only.

Threshold Se ttings for Output Power (Figure 9)

Maximum Output Power limit in DL & UL paths are defined. PA Power

“High” alarm will be generated when PA power exceeds the upper limit. RSSI limits (Figure 9)

Lower & High RSSI Limits in downlink & uplink paths are set in the factory. A RSSI “High” alarm will be generated when RSSI exceeds the upper limit, and a RSSI “Low” a larm will be genera ted when RSSI goes below the lower limit set by user. Upper and lower ranges that can be set by user vary from -50 to -80dBm.

Attenuation Settings (Figure 10)

Through this settin g, the att enuation is ins erted in both th e bands in UL & DL paths as per the require ment of RF power. It is carried out when the system is set in manual mode. In auto matic mode whatev er attenuation is inserted, is displayed.

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Figure 8: PA ON/OFF Settings

Figure 9: Threshold Setti ngs

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Figure 10: Attenuatio n Settings

III) Monitoring (Refer Figure 11)

Parameter Remarks Attenuation (Band 1 & 2) Displays UL/DL Attenuation inserted in the system in both the bands. Output Power Displays P A output power in UL & DL paths in both the bands. RSSI DL Real time RSSI DL signal strength i n both t he bands i s indicated. Location System locati on is displayed. Serial Number Serial number (factory s ettable) is displayed. Repeater ID

A unique re peater ID set by the user is displayed.

5.5 V power supply Value of derived Voltage is displayed PA Temperature DL & UL Displays t he temperature of PAs in D L & UL in both the bands Syste m Tempera ture Displays the temperat ur e of the system Alarms Displays i f there is any alarm viz. cri ti c al, major or minor. Details can

be viewed by clicking at “DETAIL ALARM”.

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Figure 11: Monitoring Status

IV) Alarms (Refer Fi gure 12)

Observation Remarks Synthesizer Fail (UL & DL) PA ON/OFF (DL & UL)

Failur e of synthesizer of a particular sub band either in DL or UL is indicate d by this alar m. Indicates the status of PA if it is ON or OFF (manual/ auto) to draw the attenti on of the maintenance staff.

RSSI Low (DL ) Indicat es th at the RSSI has exceed ed the low er li mit set. RSSI High (DL) Indicat es th at the RSSI has exceed ed the high er li mit set . PA Power Low (DL) When PA Power goes below the low er li mit set by the user, t his al arm is

generated.

PA Power High (DL) When PA Power exceeds the upper limit set by user, this alarm is

generated.

PA Tempe rature H igh

Indicates the rise in temperature beyond the safety limits.

(DL & UL) VSWR (DL & UL) Indicates when VSWR exceeds the specified limits (1.5:1) due to

mismatching.

LNA (DL &UL) Failure of LNA is indicated Syste m Tempera ture I nd ica tes t he ri s e in t em p eratur e of sy s t em.

Monitoring interval is 3 seconds i.e. af ter every 3 seconds data on the monitoring window will be refreshed.

A red indication is for Alarm present.

A green indication is for No alarm.

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V) Communication (Figure 1 3)

In COMMUNICATION window user can select s erial co mmunication port of the computer an d type of connec tion between rep eater and computer. There are two types of connections viz. Local and Remote

a) Local Conn ection

In this type of connection, user computer COM Port and repeater’s USB Port are connected directly using cable. Steps as indicated below, are followed:

• Click the “COMM.” on the command bar to display the

COMMUNICATION window.

• Select the Connection Type as “LOCAL”

• Select the computer’s Comm. Port where the repeater is

connected.

Figure 12: Display of Alarms

• Click “OK”.

b) Remote Connection

In this type of connection, User communicates from/to remote location with the repeater using wireless Modem / Cell phone. To connect:

• Click the “COMM.” on the command bar to display the

COMMUNICATION window.

CAUTION

closing/switching OFF & ON the repeater.

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• Select the Connection Type as “REMOTE ”.

• Select the computer’s Comm. Port where the wireless Modem

is connected.

• Click “OK”.

• Now click the DIALUP on the command bar to display the

DIALUP window.

• Enter / Select the repeater phone number.

• Click the “DIAL” and wait (maximum 60 seconds) for

connection.

A message “CONNECTED” will appear on the screen after the modem Connection is established.

Click the “DISCONNECT” on the DIALUP window to disconn ect

remote communication with the repeater.

Wireless Modem (Optional) is equipped inside the housing of the repeater and it can be easily locate d through a sticker provided on the same. It has a groove with SIM car d hol der in which the SIM card can be inserted for remote communication.

When the communication between repeater & PC/Laptop is in progress through USB:

1. Do not remove cable from the USB port.

2. Do not switch off the repeater. In case the communication is not required any more, click at EXIT before removing cable from USB port to avoid hanging of the PC/Laptop. In case the PC/Laptop goes in to hanging mode, it has to be restarted after

VI) Security (Figure 14)

The system has been incorporated with “Security” to protect the settings and to avoid unauthorized access. It is through a Password, which can be set/reset. Click the Password on the command bar to display Password Setting window where administrator can change password.

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Figure 13: Communication Setting

Figure 14: Password Settings

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6.3. Block Diagram Description

The signals intercepted through the Donor antenna in the DL pass through

different devices for further signal processing.

Figure 15: Block Diagram DB6MR20 Repeater (3+3 Configuration)

(see separate document)

a. DONOR Antenna

Donor antenna of appropriate bandwidth & gain interfaces the BTS on one side and repeater system on other side through RF cable. It is used to receive signals from the base station and transforms electromagnetic waves into RF signals in the DL and vice versa in the UL.

The antenna with no more than 10dBi to 12dBi gain transfers received signals to the repeater and transmits uplink signals amplified by the repeater.

b. Quad-plexers

Two Quad-plexers are equipped in the repeater, one on the BTS side & other on the server side. The functions are:

• To isolate frequency bands corresponding to DL & UL paths

• To segregate frequencies corresponding to two service bands

equipped in DL & UL paths

Refer to Figure 15

c. Low Noise Amplifier (LNA)

This module is provided after each quad-pl exer in the repeater before the converter. The LNA pr ov ides compensa tion for the l osses su ffered by the

Figure 16: A Typical Donor Antenna

stream of weak signals as it passes through passive devices. Four LNAs are provided, two each for individual bands in the UL & DL directions.

d. Converter

The basic block of converter is co mprised of L.O. , frequency mixer, fi lter and intermediate amplifier. The low noise amplified signals are converted to IF in frequency mixer with frequency fed from LO. The signals are passed through sh arply tuned filters . Number o f conv er ters eq uipped sh all depend on the number of sub bands configured in the system. Two converters (one for DL & one for UL) for each sub band are provided.

f. Power Amplifier

It is the co re module of rep eate r . It incl udes driv er st age and final stage. It is installed d irectly on the hea t si nk of th e rep eat er . Driv er s tag e an d fi nal stage of power amplifier are in the same unit. F our power amplifiers with specific frequency ban dwidths & gain are prov id ed, two eac h for in div idual bands in the UL & DL directions.

g. Supervisory

The man-machine communication between the user and the repeater is established through this module. One of the two options as given below can be used for achieving this objective:

• USB interface

• Wireless modem (Optional)

Remote controlling function of repeater can be achieved by inserting Wireless modem. different locations to be monitored.

h. POWER SUPPLY

The power supply unit incorporated in the repeater is of high efficiency and reliability. Different DC voltages required for the operation of electronic circui tries are derived in th is unit. The standard input voltage is 100 to 240 V AC, 47 Hz to 63 Hz. When the power supply varies in this range and the frequency in 47 to 63 Hz, its output DC derived voltages remain constant within 1% of nominal value.

i. SERVER Antenna

Server antenna tra nsmits signals fr om the repeater station to mobile us ers and transport received uplink signals from the mobile users to the base station. Based on the coverage area, a set of select omni/directional antenna(s) havi ng proper gains ( less than 9dBi) with conn ecters may be installed at pre-planned spots.

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This arrangement also enables status of repeaters at

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Figure 17: Typical Serv er Antenn as

7. DB6MR20 Repeater Specifications

7.1 Specification-RF

S.N0.

1. Number of Bands

Parameter Specified limits

Two, one each in 800/900 MHz & 1800/1900/2100 MHz frequency bands or as per requirement of the customer.

2. Frequency band uplink

Customized as per requirement of the user.

3. Frequency band downlink

4. Number of Sub bands

Incorporated as per requirement of the customer in accordance with frequency set for uplink. Six with 3 sub bands in each band with 3+3 configuration or as per requirement.

5. RF output power in DL

6. Gain

7. Spurious Emission

+19dBm±1dBm (P1 +26dBm)

85.0dB±3dBm <-36dBm @ 9KHz to 1GHz & < -30dBm 1GHz to 12.75 GHz

8. Gain variation over temperature

1.5 dB over normal temperature

+ range

9. Attenuation range for adjustment of gain in UL & DL

0 to 31dB in steps of 1 dB (Software control)

paths in both bands

10. Noise figure

11. Propagation delay/direction in the signal path

12. Impedance at RF ports

13. Return Loss

5 dB < 5.5 us

50 Ohms 16 dB

14. Remote control & management Through optional wirele ss modem

15. Automatic Power Control

10 dB

7.2. Electrical Specification Power Requirement

Parameters Specified/Limits

Input AC Voltage Range 100-240 V, 47/63 Hz Power Consumption Approx.

80 watts (Shall vary depending on the number of sub bands equipped)

ITEMS

QUANTITY

Repeater

unit

DB6MR20

– Model as per

PC interface cable for USB port

1 Power cable with 3 pin plug

1 Operation & Installation manual

1 CD containing the applicatio n softwar e

1 Wireless Modem (Optional)

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7.3. External Electrical Interface

Parameters Specification RF port UL RF port DL

N-type (F) N-type (F)

7.4. Mechanical Specification

Dimensions (w x h x d) Weight Approx. Housing Housing Color Cooling

520x400x180 mm (20x15x7 inches) 20 Kg. (44 lbs.) Indoor application Grey Convection

7.5. Environmenta l Specification

Conditions Specification Oper ati ng Temper at ur e

o

C to +50 0C (+230F to +1220F)

-5

Stor ag e Temperatur e Enclosure

0

C to +750C (-220F to +1670F)

-30 In accordance with indoor applications

7.6. Contents of Delivery

1

requirement

1

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8. Installation

8.1. Preparation Sheet-Pre Installation

Before the commencement of installation, a preparation sheet is compiled for

expected performance & better maintenance.

1. General

Application: Indoor Service Band 1: Frequency Band DL- UL- Service Band 2: Frequency Band DL- UL-

Number of Sub Bands: Six Sub Band 1: Frequency Band DL- UL Sub Band 2: Frequency Band DL- UL- Sub Band 3: Frequency Band DL- UL- Sub Band 4: Frequency Band DL- UL- Sub Band 5: Frequency Band DL- UL- Sub Band 6: Frequency Band DL- UL-

2. Technical requirements

S.NO. Requirement Remarks

1. Estimated RF Power available at site where donor antenna is to be installed

2. Estimated Cable loss from donor antenna to the repeater unit

3. Estimated Downlink RF power to the input of the repeater

4. Desired RF Power in DL

5. Proposed Gain settings in DL path

6. Proposed Attenuator inserted in DL path

7. Estimated Cable loss from repeater unit to server antenna port

8. ERP at server antenna

9. Desired RF Power in UL

10. Proposed gain settings in UL path

11. Proposed Attenuator to be inserted in UL path

3. Proposed site Address: ------------------------- --

4. User’s Address & other particulars: ---------------------------------

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Date: Prepared by: -------------

8.2. Engineering Consideration a. Site Selection

Site selection is one of the most critical decisions affecting the overall performance of the system. A repeater must be located where it can receive the maximum signal strength from the donor site in order to maximize the repeater’s output and performanc e, signal strength greater than or equal to -75dBm is desired.

Examples of donor antenn a locations include (but are not limited to): the roof of a building adjacent to the affected area, with the antennas mounted on the highest point in the building; the top of the hill that is obstructing the donor site’s coverage, with the antennas mounted on poles at ground level; a water tower with ante nnas mounted at the top or as the si tuation permits.

Distance from both the donor site as well as from the new area to be covered must be taken into consideration. The repeater unit should be located close to the donor si te so as to receive ad equate signal strength and at the same time it is located in the vicinity of are a where coverage is desired. In addition, the donor antenna associated with the repeater unit should have line of sight with BTS site to reduce the effects of fading.

Another important aspect when choosing a repeater location is the availability of AC for opera tion of the s ystem. Sites where repe ater unit is installed should be easily accessible for the maintenance team.

b. Antenna Selection and Placement

Proper select ion of the repeater ’s donor and server antennas is crucial in designing the repeater system. Appropriate antenna characteristics help to provide proper isolation between the server (coverage) and donor antennas, which helps to prevent feedback. An is olation of at least 15 dB more than the gain setting of the repeater is maintained to avoid the possibility of oscillations.

Specific ways to achieve proper isolation include: using high gain directional antennas with good Front to Back ratios (25dB or better); physical separation of the repeater’s donor and server antennas; and external shielding between antennas. A high gain antenna will help minimize overall path loss to achieve the desired output power. Donor antenna gains are typical ly 10 to 12 dB, while server antennas with gains as per requirement are deployed.

• The antennas should have proper frequency band of operation.

• Adequate separation is to be ensured from the power lines to

avoid damage to the equipment and humans.

• Antenna with proper character istics to maintain ad equate isolat ion

• The beam width for the DONOR anten na should be as small as

• The beam width for SERVER antenna is 60 degree to 120 degree.

• There should be adequate vertical & horizontal separation

Separation can be determined by the mathematical formulas:

Isolation (dB) = 28 + 40 log (D/λ in meters)

Isolation (dB) = 22 + 20 log (D/λ in meters) – (Gain of donor

The following table is an approximate guide to antenna separation. The use of highly directional antennas with good fro nt to back ratios can help to achieve isolation requirements.

A Typical Example

Vertical Separation

Horizontal Separation

Vertical and Horizontal Antenna Separation @ 900 MHz

The antenna separation table demonstrates that vertical separation yields better results than horizontal separation. However, when desired isolation cannot be met due to ins ufficient separation, ex ternal shieldi ng can help; for example, mounting the antennas on either side of a rooftop penthouse or

Next Generation Sig n a l Enha ncement

to avoid oscillations. Normally, isolation should be 15 dB more than the gain set for the repeater. It should have good front to back ratio.

possible.

between the DONOR & SERVER antennas to avoid interference and noise.

Vertical Separation: Horizontal Separation:

antenna + gain of server antenna) D-Distance between donor & server antennas in meters λ- Wave length in meters

Separation (m.) Isolation (dB)

5 75.0 10 87.1 20 99.1 30 106.2 40 111.2 50 115.0

Separation (m.) Isolation (dB)

5 45.5 10 51.7 50 65.5

100 71.5 150 75.1 250 77.6

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using some type of grou nded metal sc reen or wire mesh (s o called ch icken wire) between antennas.

The following example illustrates a typical signal level at input of the repeater and other losses with final EIRP:

Received Signal Level -62 dBm

Donor Antenna gain 12 dBi

Cable loss (100 ft. of 7/8 inch) 2 dB

Input to Repeater -52 dBm

Gain of Repeater set 70 dB

Output of Repeater +18 dBm

Cable loss (100 ft. of 7/8 inch) 2 dB

Server Antenna Gain 7 dBi

Repeater EIRP +23 dBm

c) Overlapping Coverage

Ideally, the repeater system will be engineered with minimal overlapping coverage between th e donor base station and the repeater. However, the mobile will occasionally receive signals from both the donor and the repeater at similar lev els. This situa tion is comparable t o a mobile r ece iv ing multiple signals at varying times due to multi-path propagation.

The repeater contributes a maximum signal delay of 5.5 microseconds in each direction.

d) Call Processing

The mobile communicatio n system perc eives calls handled by the repeate r as actual ly being handled by the donor site (BTS); the repeater is just an extension of the base station’s coverag e. Therefore, the donor handles call initiation, power contro l messages, hand-over requests, etc., for mobiles in the repeater area. Whe n the base station assigns a channel to t he mobile, that channel is sent through the repeater and then reradiated under the same frequency. Sinc e the repeater is technic ally part of the base station, no hand-over takes place when a mobile moves from the repeater’s coverage area to t hat of th e base station . When th e mobile moves from the repeater’s area to a nei ghboring si te, the base station hand les the hand-off in the same way as for a mobile in the base station area.

8.3. Installation Tools

You will need the following basic tools for installation:

a. Standard wrenc hes/screwdrivers /cable stripper/cab le cutter/pliers set

for installing the DB6MR20 Unit and antennas. (Refer to the manufactur er’s recommendations for installing the antennas).

Donor Antenna

USB Interface port

Server Antenna

b. RF cable connecting tool for installing connectors. c. Multi-meter. d. Mobile han dset loaded with NET engineer ing software to be used for

signal level measurement.

e. Magnetic compass for measuring the azimuth of the BTS and

repeater site.

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Port

Figure 18: Connections at ports

8.4. Installation Procedure

1. RF cable installation must comply with local or National Electrical Codes. The cable shall have nominal 50-Ohm impedanc e. Pull and route the RF cables as per the site installation plan.

2. Fix the supplied connectors to the RF cable and verify the following:

• The center con ductor t o outer shield of RF c oax ial cab le i ndica tes “Open Circuit” condition.

• Check for any short circuit between center conductor and outer shield.

Port

• Place sho rt between t he center conductor and outer shiel d using a piece of wire te mporarily and chec k the other end of conduc tor for any break in the RF cable.

3. Mount the DB6MR20 unit on the intended wall surface using the appropriate screws.

4. Install the indoor coverage antenna according to the antenna manufacturer’s instructions. Connect the RF cable between the indoor antenna and the “MS” port on the DB6MR20 unit.

5. Install the donor antenna (Outdoor antenna) according to the antenna

manufacturer’s instructions. Connect the RF cable between the donor antenna and the “BTS” port on the DB6MR20 unit.

8.5. Gain Settings

The repe ater gain is one of the vital parameters s ince it also d ecides the area to be provided with RF coverage. The noise contribution has to be minimum while the gain is set.

Signals received by DONOR antenna from BTS and transmitted to the repeater are termed as DL/Forward signals and the signals originated by mobile users and intercepted by SERVER antenna for application to repeater are termed as UL/Reverse signals.

a. Forward Gain Setting

The process of setting the forward gain is carried out automatically (in automatic mode) throug h software depending on the threshold settings fo r RSSI & maximum RF power.

In manual mode, the s etting is carried out through software by obs erving the forward signal level strength with any mobile handset loaded with engineering software.

Alternatively, RSSI can also be observed through LEDs provided on the top of the cover of repeater.

Once the RF outp ut power has be en determined, the a ttenuation will have to be modified to reach the desired output signal level.

The gain of repeater can be set using any of the following methods:

a. Local USB serial interface mode (GUI based)

b. Remote through (optional) wireless modem.

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b. Reverse Gain Setting

For reverse gain setting, 31dB variable attenuator is inserted in accordance with the attenuation inserted in the DL.

8.6. Commissioning

Important:-Repeater should not be connected to Power without termination at the antenna ports. The termination can be carried out either by the antenna conn ection as well as a dummy load or the 50 terminated connection of a measuring instrument (Power Meter, Spectrum analyzer with appropriate PAD)

1. Plug the power cable to the AC mains and switch ON the unit.

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Ω

2. Once the repeater is ON, the LEDs will not glow under normal condition.

3. The UL Align indicatio n LED and DL align indication LEDs will blink for adjusting the DL gain and UL gain automatically.

4. Review the intended coverage area according to the site installatio n plan. Measure & monitor signal level at various points within and around the perimeter of the c overage area with a mobile h andset loaded with NET engineering software and the SIM card of cellular operator.

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8.7. Checklist – Post Installation

After completion of installation, points as sta ted in the checklist may be verified

to ensure that all aspects have been covered.

Service Bands Particulars:

Frequency Band for Band 1 DL Frequency Band for Band 1 UL Frequency Band for Band 2 DL Frequency Band for Band 2 UL

A. Repeater Installation S.NO. Point(s) To be Verified Remarks

1. Ensure isolation between server and donor antennas, it has to be 15 dB + Gain set of the repeater.

2. Actual isolation measured

3. Ensure proper grounding of the unit

4. Cable from donor antenna connected to donor antenna port

5. Cable from server antenna connected to the relevant port in the unit

6. Mains cable connected to the repeater unit

7. Cable protection ensured and outdoor connections are waterproof

B. Repeater Set Up S.NO. Point(s) To be Verified Remarks

1. Number of sub bands equipped

2. Number of Sub band(s) in Ba nd 1 wit h frequenc y

band width of eac h .

3. Number of Sub band(s) in Ba nd 2 wit h frequenc y

band width of eac h .

4. Repeater switched ON

5. Any error (alarms) observed

6. Gain set

7. Power level in DL

8. Attenuation in DL

9. Power level in UL

10. Attenuation in UL

11. Observation on CMC software & GUI

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12. Repeater secured & locked

Any Other Remark/Comment: Date of Installation: ------------------------ Repeater ID & Site Address: ----------------

Name of the Installer: -----------------------------------------------------

8.8. Dos & Don’t Dos

1. The site should be accessible for maintenance purposes.

2. Arrangement is to be made to avoid unauthorized access to the repeater.

3. For indoor applications, the housing should be kept away from direct exposure to the Sunlight & chemical fumes.

4. Stable power supply for repeater unit should be ensured.

5. The route of Cables to/from antennas should be short to minimize the cable losses and should be free from sharp bends & kinks.

6. There should be adequate separation between antenna system and power lines to avoid damage to system and humans.

7. Local standard of cabling should be followed.

8. The donor antenna should have proper line of sight with the BTS from where the signals are to be intercepted for maximum signal strength and to reduce the effect of fading.

9. The selection of BTS should be made taking other BTSs in the same vicinity in to consideration to avoid interference.

10. Gain of the rep eater should be set after taking an tenna isolation in to consideration.

11. The estimation of coverage area should be confirmed.

12. The system should be made over for normal traffic after actual

measurement of:

a) RF power in the DL b) RF power in the UL c) Antenna Isolation d) Gain settings in DL & UL

13. Feedback rega rding pe rformance o f the syste m may be s ent to Shya m

Telecom by the user.

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8.9. Display Details of DB6MR20

In order to display the status prevailing in the system, LEDs are provided on

the top cover of the housing. These LEDs display the conditions in both the bands.

Figure 19: LED Display on DB6MR20

• UL ADJ. will blink when system is in Uplink Alignment mode.

• DL ADJ. will blink when system is in Downlink Alignment mode.

• ALC LED will blink when, when system is in ALC.

• Alarm LED will Glow when th e system goes to the s hut down mode due to

input power going/out put power going high (beyond ALC) in DL path.

• Downlink RSSI is continuously monitored and level is displayed through 8 LED’s.

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9. System Maintenance

9.1. General

The system normally operates without any operator intervention or maintenance. In the event of fault, the field replaceable units (antenna & cables) shoul d be checked for faults and the syst em restored if possible . A faulty unit can be r emoved and r eplaced with a spare while the res t of the system is still o perating. Soldering or loca l repair of the modules shoul d be avoided. Faulty module/unit should be replaced with genuine spares from Shyam Telecom Limite d only.

However, the power supply of the faulty unit should be isolated from AC mains and DC power before any module is replaced. In the event of a system malfunctioning, the status of the antenna systems should be checked as well as the continuity of the cabling before replacing any modules within the repeater.

9.2. Preventative Maintenance The DB6MR20 repeater does not require any preventative maintenance.

9.3. In-Building Coverage Problems

If the coverage area appears to be smaller than the installation site plan, there are only a few possibilities that limit the signal level in the area.

I) Physica l obstructions degrading the s ignal level-Visually ins pect the

area of weak coverage. If possible, rearrange objects that may be interfering with the si gnal path. Pay particular at tention to large metallic objects that reflect or block the signals to the weak coverage area. If weak coverage area still persists, check the following:

a. Inspect the indoor RF coaxial cable and its connection with

connector

b. Indoor antenna direction and its tilting

c. DB6MR20 repeater gain setting

II) Defective Indoor coaxial cable/Antenna – Check the RF coaxia l cable

and antenna. If necessary, replace each individually with a known functional unit, and verify the respective signal level. This can be achieved by obs erving the sig nal strength indica tor on a mobile hand set that has an unobs tructed line-of-sight view, 15 to 20 feet (5 to 7 meters) from the indoor antenna. If the s ignal level increases at this test location, re-verify the signal level in the weak coverage area. If the signal level remains marginal, inspect the unit.

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III) Defective Unit – Replace the unit with a known operational unit. Ve rify

the signal level at the unobstructed test location. If the signal level increases, re-verify the weak cov erage area. If the weak coverage area remains marginal, an additional indoor antenna or DB6MR20 may be required to cover the additional area. If the unit is found to be defective, please contact o ur Technical support te am. The unit serial number must be available to establish a return authorization. If replacing any part, Shyam authorized service dealer should replace it and no soldering/ repairing of PCBs should be carried out in the field for reliable service thereafter.

IV) Signal Quality Problems

Under certain conditions, the signal level on the mobile handset may indicate adequate signal strength, but the quality of the signal is degraded (i.e. distortion).The signal level at the donor antenna is probably too strong. Under these conditions, the service provider’s exterior signal level is adequate, in such condition, reduce the forward path signal using the forward attenuation in the repeater and minimize the forward signal level in step of 1dB until the problem subsides. But ensure that the In-Building signal level remains adequate for the coverage area.

V) Antenna Isolation

Antenna is olation is defined by the path loss or attenua tion, between the donor and server antennas. It is important to ensure that the antennas are sufficiently separated, such that the signal transmitted by donor antenna is not received by server antenna and v ice versa. For optimal performance, the separation of the two antennas must provide a path loss of at least 15 dB greater than the set gain of the repeater.

In most cases, isolation will be achieved by properly locating the donor and server antennas, respectively. The optimal location for the donor antenna is high above the roofline, and exterior to the building. The indoor coverage antenna (server) should be installed inside, near or below the ceiling. Following guidelines should ens ure adequate isolation between antennas.

a) Never mount the donor or server antenna near a window, where

signals can easily pass through the glass.

b) Mount the donor antenna as hig h as physic a lly possible to the ext erior

of the building, maximizing the v ertical separation bet ween the donor and server antennas. The donor antenna should point towards the base station site.

c) Install the antennas taking advantage of any existi ng buildi ng structure

such as brick walls, metal roofs, or multiple wall structures to additionally attenuate the path between them.

d) Whenever using directional antennas inside the building to cover

corridors and ha llways, poi nt t he i ndo or an tenna awa y fro m the dono r antenna location.

e) In extre me c ases, the bu ilding configuration may not allow for such

separation and isolation. If additional isolation is required, coaxial

attenuator may be inserted between the donor antenna and the repeater or reduce the forward path signal using the attenuation control with the likely compromise to the overall coverage within the

TYPICAL PRODUCT APPLICATION

building.

Figure 20: Indoor Application of DB6MR20 in a room

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Celling Antenna

DB6R20

Ceiling Antenna

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Figure 21: Indoor Applica tion DBR6R20 in a Corridor

DB-6R-20

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FCC Statement:

FCC ID:S3CDB6MR20 This device complies with Part 2, 22,24 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference and (2) this device must accept any interference received, including interf ere nc e that ma y cause un d esir ed operati on.

IC Statement:

Trade Name: SHYAM Dual Band Inddor Repeater Model No.: DB6MR20 IC: 5751A-DB6MR20 This device complies with RSS-1 31, RSS - 102 of the IC Rules.

Warning

Changes of modificat io ns not e xpr ess l y appr ov ed by the manufact ure r coul d void the user’s authori ty to operate the equ ipment s.

Antenna Information:

This device has been designed to operate with th e antennas liste d below, and having a maximum gain of 12dBi. Antennas not incl uded in this lis t or having a gain greater than 16dB are strictly prohibited for use with this device. The required antenna impedance is 50 ohms.

Antenna (or equivalent) list:

1) Donor Antenna , max. 12 dbi for UPLINK path

2) Server Antenna, max. 9 dbi for DOWNLINK path

To reduce potential radi o interference to other users, the antenna type and its gain should be so chosen that the equivalent isotropically radi ated po wer (e.i.r.p.) is no t more than that permitte d for successful communication.

WARNING! This equipment complies with FCC & IC radiation exposure

limits set forth for an uncontrolled environment. This transmitter must not be co-located or operating in conjunction with any other antenna or transmitter. For mobile or fix ed location transmitters, the minimum separation distance is greater than 20 cm (indoor server antenna), even if calculations that the MPE distance would be less.

Email:

contact@shyamtelecom.com

For Technical Suppor t, please contact at any of the following addresses:

For Americas

Next Generation Sig n a l Enha ncement

Shyam Telecom Inc.

6, KILMER ROAD, SUIT D,

EDISON, New Jersy-08817 (USA)

For Europe

Shyam Telecom GmbH.

Frohsinnstrasse 16, 63739 Aschaffenburg, Germany

Tel: + 49-6021-45901-0 Fax: + 49-6021-45901-29

For Asia Pacific

Shyam Telecom Ltd. 246, Phase IV, UDYOG VIHAR,

GURGAON – 122015 (INDIA)

Tel: +91-124-4311600 FAX: +91-124-4018117

Shyam RF/DBR Series, DB6MR20 Operation & Installation Manual

Specifications and Main Features

Frequently Asked Questions

User Manual