Wireless N2-4XE1-5G7, N2-4XE1-5G3 User Manual

Installation and Operations Manual

Part Number 281-102471-201 February 2000

N2-4XE1

Wireless, Inc. 5452 Betsy Ross Drive Santa Clara, CA 95054-1101

N2-4XE1 nstallation and Operation Manual

Notice

Information in this document is subject to change without notice. No part of this document may be reproduced or transmitted in any form or by any means, electronic or mechanical, for any purpose, without the express written permission of Wireless, Inc.

N2-4XE1 Installation and Operation Manual

Table of Contents

1.0 General Overview ................................................................................................................. 1

1.1 N2-Link Series Product Family .................................................................................. 1

1.2 Introduction to the N2-4XE1 ...................................................................................... 1

1.3 Regulatory Information .............................................................................................. 2

2.0 N2-4XE1 Product Profile ....................................................................................................... 3

2.1 General Overview ...................................................................................................... 3

2.2 Specifications ............................................................................................................ 7

2.3 User Interfaces ........................................................................................................ 10

2.4 ODU Performance Monitoring ................................................................................. 13

2.5 Theory of Operation ................................................................................................ 13

3.0 Equipment Installation and Commissioning ........................................................................ 20

3.1 Installation ............................................................................................................... 20

3.2 Install the IDU .......................................................................................................... 21

3.3 Outdoor RF Unit Installation .................................................................................... 22

3.4 Commissioning ........................................................................................................ 28

4.0 Maintenance and Troubleshooting ...................................................................................... 30

4.1 N2-4XE1 Maintenance ............................................................................................ 30

4.2 Identifying and Resolving Receive Signal Strength Issues ..................................... 31

4.3 Where to Get Further Assistance ............................................................................ 32

4.4 Return Procedure .................................................................................................... 33

Appendix A Grounding Practices and Lightning Protection Information....................................... A-1

Appendix B Installation Instructions .............................................................................................. B-1

Appendix C Adjustable Panel Antenna Mount ..............................................................................C-1

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N2-4XE1 Installation and Operation Manual

Figures

Figure 2.1 Typical Deployment of a N2-4XE1 in a Point-to-Point Configuration ........................ 5-6

Figure 2.2 N2-4XE1 Link IDU ......................................................................................................10

Figure 2.2a Outdoor Unit, Front View ............................................................................................ 12

Figure 2.2b Outdoor Unit, Back View ............................................................................................ 12

Figure 2.3 Block Diagram, IDU ....................................................................................................14

Figure 2.4 N2-4XE1 Block Diagram ....................................................................................... 18-19

Figure 3.1 N2-4XE1 Link Rack Mount ......................................................................................... 21

Figure 3.2 Outdoor Unit Mounting Hardware .............................................................................. 22

Figure 3.3 Mounting the Outdoor RF Unit to the Bracket ............................................................ 23

Figure 3.3a Mounting the Bracket Latch and Stand Mount Detail ................................................. 24

Figure 3.3b Locking the Mounting Hardware ................................................................................ 25

Figure 3.3c N-Type Antenna and Siamesed Ethernet/Power Connections .................................. 26

Figure 3.3d Ground Connection ....................................................................................................27

Figure B.1 Two Foot Diameter Antenna ..................................................................................... B-1

Figure B.2 Mount Configuration .................................................................................................. B-3

Figure B.3 Mounting Hardware Packed ...................................................................................... B-5

Figure B.4 Mounting Hardware Unpacked .................................................................................. B-5

Figure B.5 Parabolic Reflector .................................................................................................... B-8

Figure B.6 Unpacking the Radome ............................................................................................. B-8

Figure B.7 Antenna Mount Assembly ......................................................................................... B-9

Figure B.8 Antenna Mount Assembly ....................................................................................... B-10

Figure B.9 Elevation Rod Assembly ......................................................................................... B-10

Figure B.10 Feed Horn Installation ............................................................................................. B-11

Figure B.11 Feed Horn Polarization Markings ............................................................................ B-12

Figure B.12 Parabola Rear View Showing Polarization Reference Markers .............................. B-12

Figure B.13 Feed Horn Installation ............................................................................................. B-13

Figure B.14 Feed Horn Installation for Vertical Polarized Operation.......................................... B-13

Figure B.15 Azimuth Clamp/Shear Stop Assembly .................................................................... B-14

Figure B.16 Azimuth Adjustment Clamp Assembly ................................................................... B-14

Figure B.17 Hoisting the Antenna ............................................................................................... B-15

Figure B.18 Antenna Alignment using RSL Output while adjusting the antenna ....................... B-16

Figure C.1 Antenna Mount .......................................................................................................... C-1

Figure C.2 Azimuth and Elevation Planning ............................................................................... C-2

Figure C.3 Azimuth and Elevation Planning ............................................................................... C-3

Figure C.4 Flat Panel Antenna....................................................................................................C-4

Figure C.5 Adjustable Panel Antenna Mount ..............................................................................C-5

N2-4XE1 Installation and Operation Manual

Tables

Table 1.1 FCC U-NII Bands ......................................................................................................... 2

Table 2.1 Recommended Antennas ............................................................................................. 8

Table 2.2 Features Available Through RS-232 Interface ........................................................... 11

Table 3.1 Inventory of Equipment and Installation Materials ..................................................... 20

Table 3.2 Installation Checklist................................................................................................... 28

Table 3.3 Approximation Table .................................................................................................. 29

Table 4.1 Frequencies ................................................................................................................ 31

N2-4XE1 Installation and Operation Manual

Welcome!

Welcome to the Wireless, Inc. N2-ACCESS™ Series product family. This manual is designed to introduce you to the N2-4XE1 operate and maintain a N2-4XE1 wireless communication system.

The N2-4XE1 is intended for professional installation only. This manual, however, is also designed for personnel who plan, operate and administrate the N2-4XE1 communication system. Please review the entire manual before powering up or deploying any N2-4XE1 .

Updates to this manual will be posted on the Wireless, Inc. Customer Service Website at http://www.wire-less-inc.com. Registered Wireless customers can access Wireless’ on-line information and support service, available 24 hours a day, 7 days a week. Our on-line service provides users with a wealth of up-to-date information, with documents being added or updated each month.

™, and to provide you with information necessary to plan, install,

Radiation Warnings

Microwave Radio Radiation Warning

Under normal operating conditions, N2-4XE1 radio equipment complies with the limits for human exposure to radio frequency (RF) fields adopted by the Federal Communications Commission (FCC). All Wireless, Inc. microwave radio equipment is designed so that under normal working conditions, microwave radiation directly from the radio is negligible when compared with the permissible limit of continuous daily exposure recommended in the United States by ANSI/IEEE C95.1-1991 (R1997), Safety Levels with Respect to Human Exposure to Radio Frequency Electromagnetic Fields, 3 kHz to 300 GHz.

Microwave signal levels that give rise to hazardous radiation levels can exist within transmitter power amplifiers, associated RF multiplexers, and antenna systems.

Never look into the open end of a Waveguide as eyes are particularly vulnerable to radiation.

Do not disconnect RF coaxial connectors, open microwave units, or break down any

microwave screening while the radio equipment is operating.

N2-4XE1 Installation and Operation Manual

Microwave Antenna Radiation Warning

Designed for point-to-point operation, an N2-4XE1 microwave radio system will use directional antennas to transmit and receive microwave signals. These directional antennas are usually circular or rectangular in shape, are generally located outdoors, and are usually mounted on a tower or mast.

Referencing OET Bulletin 65 (Edition 97-01, August 1997) from the Federal Communication Commission’s Office of Engineering & Technology, limits for maximum permissible exposure (MPE) to microwave signals have been adopted by the FCC for both Occupational/Controlled environments and General Population/Uncontrolled environments. These limits are 5.0 mW/

and 1.0 mW/cm2, respectively, with averaging times of six-minutes and thirty-minutes,

respectively.

The closer you are to the front center-point of a microwave antenna, the greater the power density of its transmitted microwave signal. Unless you are very close, however, microwave exposure levels will fall far below the MPE limits. To determine how close to a microwave antenna you can be and still remain below the MPE limits noted above, “worst case” predictions of the field strength and power density levels in the vicinity of an N2-4XE1™ microwave antenna can be made from the following calculations. The equation is generally accurate in the far-field of an antenna, and will over-predict power density in the near-field (i.e. close to the antenna).

S = PG/4πR

where: S = power density (in mW/cm2)

P = power input to the antenna (mW) G = power gain of the antenna in the direction of interest relative to an isotropic

radiator

R = distance to the center of radiation of the antenna (cm)

Note that G, the power gain factor, is usually expressed in logarithmic terms (i.e., dB), and must be converted using the following equation:

G = 10

dB/10

For example, a logarithmic power gain of 24 dB is equal to a numeric gain of 251.19.

Assuming (1) maximum output power from the N2-4XE1 (+3.5 dBm [2.238 mW]), (2) no signal loss in the cable connecting the N2-4XE1 to the antenna, and (3) the use of a 27 dBi gain parabolic antenna, the 5.0 mW/cm2 and 1.0 mW/cm2 MPE power density limits would be reached at distances of approximately 4.22 cm and 9.44 cm, respectively.

Wireless, Inc. fully supports the FCC’s adopted MPE limits, and recommends that personnel maintain appropriate distances from the front of all directional microwave antennas. Should you have questions about N2-4XE1™ microwave signal radiation, please contact the Wireless, Inc. Customer Service Department.

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N2-4XE1 Installation and Operation Manual

Notice Regarding Operation pursuant to FCC part 15 Rules

This equipment has been tested and found to comply with the limits for a Class A digital device pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense.

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N2-4XE1 Installation and Operation Manual

1.0 General Overview

1.1 N2-Link Series Product Family

All N2-4XE1 radios are members of the N2-ACCESS Series radio product family. The N2ACCESS Series is designed to provide an economical wireless solution for local access telecommunication requirements.

This manual addresses, in detail, the operation of the N2-4XE1. For detailed information on other members of the N2-ACCESS Series, please refer to the appropriate Operation Manual(s).

1.2 Introduction to the N2-4XE1

The N2-4XE1 is a digital radio using BPSK modulation techniques and is designed for use as a point-to-point communications system. The N2-4XE1 is used in the following applications: point-to-point (building to building), ISPs, CLECs, Wireless Local Loop (WLL), Backup Solutions and Temporary Links.

The N2-4XE1 radio is designed for operation in two of the Unlicensed National Infrastructure at frequencies of 5.250 - 5.350 GHz or 5.725 - 5.825 GHz.

Each N2-4XE1 is comprised of an indoor unit which provides the means to connect system power, formatted data, SNMP interface and RS-232 ports to monitor and control the link. An outdoor pole mounted RF unit is supplied as part of the system. Each link is powered by means of a DC power supply which is fed to the unit through a power/data cable. The system has a data total transmission capacity of 8.448 Mb/s. Refer to the N2-4XE1 data sheets for detailed information relating to product offerings and specifications.

N2-4XE1 Installation and Operation Manual

1.3 Regulatory Information

In January 1997, the FCC made available 300 MHz of spectrum for Unlicensed National Information Infrastructure (U-NII) devices. The FCC believes that the creation of the U-NII band will stimulate the development of new unlicensed digital products which will provide efficient and less expensive solutions for local access applications.

The U-NII band is divided into three sub bands at 5.15 - 5.25, 5.25 - 5.35 and 5.725 - 5.825 GHz. The first band is strictly allocated for indoor use and is consistent with the European High Performance Local Area Network (HIPERLAN). The second and third bands are intended for high speed digital local access products for “campus” and “short haul” microwave applications.

Table 1.1 - FCC U-NII Bands

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)xaM(rewoP PRIEsttawillim002PRIEttaw1)PRIE(sttaw4

1dnaB2dnaB3dnaB

esUdednetnI ylnOesUroodnIsupmaCselim01xorppA

.dnabIIN-U528.5-527.5ehtnittaw1

swolla8991,42enuJnodesiver)00M(redrodnanoinipomudnaromemCCFtnecerA:etoN*

forewoptuptuorettimsnartmumixamadnaniagiBd32htiwannetnalanoitceridafoesueht

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N2-4XE1 Installation and Operation Manual

2.0 N2-4XE1 Product Profile

2.1 General Overview

The N2-4XE1 series of microwave radio products provides digital capacities for 4XE1 data rates for short-haul applications up to 10 km. The radio terminal operates in the Unlicensed National Information Infrastructure (U-NII) spectrum with a revolutionary Split Modulation system architecture that provides full duplex operation in the 5.3/5.7 GHz U-NII frequency bands.

The N2-4XE1 series provides the unique advantage of a very robust digital transmission scheme employing advanced Forward Error Correction (FEC) techniques to reduce data errors.

The product uses two separate 100 MHz bands within the U-NII frequency spectrum. Within these bands, the N2-4XE1 series operates in one of many independent channels providing for frequency reuse and network flexibility, ideal for dense network applications.

Synthesized RF channel selection is field configurable, as are the power output options for the selection of antenna sizes. Frequency coordination and installation guidelines are provided in the appendix section of this manual.

Complying with all aspects of FCC Rules Subpart 15.401-15.407, the transmission characteristics of the N2-4XE1 series are ideally suited to meet the peak power spectral density requirements of the U-NII 5.250 - 5.350 and 5.725 - 5.825 GHz bands.

The N2-4XE1 has been designed for easy access to all interfaces, controls, and displays. Information in this manual will familiarize you with all of these items. Figure 2.1 illustrates two (2) N2-4XE1 terminals in a point-to-point configuration.

N2-4XE1 Installation and Operation Manual

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N2-4XE1 Installation and Operation Manual

Figure 2.1 (WL272904) goes here

N2-4XE1 Installation and Operation Manual

Figure 2.1 (WL272904) goes here

2.2 Specifications

2.2.1 General Specifications

Frequency Band: Full-duplex operation in the Unlicensed National Regulations: Complies with FCC Ruling Part 15, Subpart E (U-NII)

Frequency Range: 5,250 - 5,350 MHz and 5,725 - 5,825 MHz Capacity Options: 4xE1

2.2.2 Digital Interface

Type: Based on 4 E-1 inputs Line rate: 4 x 2.048 Mb/s Line Code: HDB3 Interface: 75 Connectors: BNC (75

2.2.3 Transmitter

Frequency Range: 5,250 - 5,350 MHz 5,725 - 5,825 MHz Output Power (maximum): 0 dBm 0 dBm

2.2.4 Receiver

N2-4XE1 Installation and Operation Manual

Information Infrastructure

ITU-T/E1

Ω unbalanced or optional 120Ω unbalanced

Ω) or RJ-48C (120Ω)

5.3 GHz (Low Band) 5.7 GHz (High Band)

+4 dBm +4 dBm +8 dBm +8 dBm +12 dBm +12 dBm

Type: Coherent Detection Coherent Detection Sensitivity, BER 10

-6

Typical: 85.5 dBm 85.5 dBm

Maximum RF Input: -20 dBm -20 dBm

N2-4XE1 Installation and Operation Manual

2.2.5 Antennas

Flat Panel: 6” (15.24 cm) 18 dB 35 dB

Parabolic: 2’ (.61 m) 28 dB 38 dB

Forward Gain Front/Back Ratio

12” (.30 m) 23.5 dB 41 dB 24” (.61 m) 27 dB 45 dB

4’ (1.22 m) 34 dB 46 dB

Table 2.1 - Recommended Antennas

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iBd5.82,dezireloPenalP,hsidretemaid'2IRA25-2PSSleirbaG

iBd5.82,dezireloPlauD,hsidretemaid'2IRA25-2DSSleirbaG

iBd5.33,dezireloPenalP,hsidretemaid'4*A25-4PSSleirbaG

iBd5.33,dezireloPlauD,hsidretemaid'4*A25-4DSSleirbaG

iBd81,dezireloPenalP,lenaPtalF"625-5.SPFDleirbaG

iBd5.32,dezireloPenalP,lenaPtalF"2125-1SPFDleirbaG

2.2.6 Diagnostics

Front Panel Indicators: Power (normally On) Alarms: Major Alarm On

External Alarm Inputs: Two separate TTL level inputs, ground inputs to alarm Performance Monitoring: Receive Signal Strength Indicator (RSSI)

2.2.7 Power

Input Voltage Range: ±20 to 72 VDC Power Consumption: 21 watts maximum

2.2.8 Environmental

Temperature Range: -10°C to +50°C -30°C to +60°C Altitude: 4,500 meters (15,000 ft) 4,500 meters (15,000 ft) Humidity: 95% non-condensing Outdoor, all weather

iBd5.82,dezireloPenalP,lenaPtalF"4225-2SPFDleirbaG

.tnailpmocCCFtoneradna,ylnoASUehtedistuoesuroferasannetnahsidtoof-4ehT*

LED

Minor Alarm Blinks

(DB9 connector)

Indoor Unit Outdoor Unit

enclosure

709772LW

2.2.9 Mechanical

Dimensions (HxWxD): 44 x 483 x 240 mm 310 x 351 x 73 mm

Weight: 2.9 kg (6.6 lbs) 5.2 kg (11.5 lbs)

2.2.10 FCC Information (US Only)

This device has not been authorized as required by the rules of the Federal Communications Commission. This device is not, and may not be, offered for sale or lease, or sold or leased, until authorization is obtained.

Notes: 1. N2-4XE1 is intended for professional installation only

2. Specifications subject to change without notice

N2-4XE1 Installation and Operation Manual

Indoor Unit Outdoor Unit

(0.72 x 19.0 x 9.4 in) (12.2 x 13.8 x 2.88 in)

N2-4XE1 Installation and Operation Manual

2.3 User Interfaces

The N2-4XE1 provides user interfaces for fused DC power connection, electrical grounding, radio frequency (RF) antenna connection, E1 Data connection, configuration and RSSI output. The following provides information on each interface. Figure 2.2 shows the locations of each connection to the indoor unit.

Indoor Unit, Connections

• 21-56 VDC Power Input - provided by customer, each terminal consumes 21 Watts

• 4xE1 Input/Output BNC type - E1 data conforming to the G.703 standard

(Optional RJ-48C Connection)

• NMS-Port - RJ-48C - SNMP interface for existing NMS systems

• Aux Port 1-RS-232 Connection, DB9 - provides local and remote control over terminals

• Aux Port 2-RS-232 Connection, DB9 - provides local and remote control over terminals

• ODU Power Interface - Category 3 Siamesed cable provided in the install kit

• ODU Data Interface - Category 3 Siamesed cable provided in the install kit

Indoor Unit, Controls and Indicators

• Fuse/On-Off Switch - Fuse holder containing a 250 V, 3 amp fuse for protection of the system. The fuse can be rotated counterclockwise to disable the system, clockwise to enable.

• LEDs, Status and Alarm - The status LED confirms the system is on. The alarm LED indicates an alarm condition exists. The fault can be determined by means of the local RS232 interface on the IDU and a VT-100 terminal.

• G.703 Ground Switch - Enables the customer to configure the ground requirements of the E1 unbalanced connections according to the G.703 standard.

• LEDs, Link, TX and RX - Provide a visual indication of the status of the link, transmitter and receiver.

Fuse -250V 3A

N2 -

250V 3A

21-56V

Link

21-56 VDC

Input

Status

Alarms

Figure 2.2 - N2-4XE1 Link IDU

G.703 Ground

Digital Input

1234

Digital Output

4xE1 Data Input/Output BNC-Type Connections

Switch

NMS Port

Link

NMS - SNMP

Interface, RJ-48c

RS 232 Interface,

DB-9 Connector

AUX Port 1

AUX Port 2

ODU Interface

Data

Siamesed Cat 3

Data/Power

To/From ODU

WL272903

Outdoor Unit

• Date/Power Cable - Siamesed cat - 3 Data and power cables.

• RSSI - BNC type connector used for RSSI measurement.

• Antenna (RF) Connector - N-type connector used for connection with antenna.

• Main Power - The N2-4XE1 is designed to work from a power input of 20 to 56 VDC.

• Grounding Connector - The front panel of the N2-4XE1 is equipped with an M5 ground

screw and associated washers. This ground screw serves as the proper chassis-ground connection point for an external ground source. The N2-4XE1 must be grounded in accordance with the electrical codes, standards, and practices governing the local installation.

The following alarm configuration features are possible using the RS-232 interface:

N2-4XE1 Installation and Operation Manual

Table 2.2 - Features Available Through the RS-232 Interface

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smralAUDI tsoLataDUDO,mralAxumeD,mralALLP,4-1SIA

noitarugifnoCUDIsehctiwS,noitarugifnoC,dnuorG,307-G

smralAUDOrezisehtnyS,domeD,evieceR,CLA

noitarugifnoCUDO noitceleSycneuqerF,noitaunettAFR,kcabpooLelbaC

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N2-4XE1 Installation and Operation Manual

Figure 2.2a - Outdoor Unit, Front View

Mounting

Studs

WL272910

Figure 2.2b - Outdoor Unit, Back View

Antenna Connection (N Type, Female)

Receive Signal Level (RSL) Output (BNC Type, Female)

Siamesed Category 3 Ethernet and Power cables

ODU

Ground Connection

WL272905

N2-4XE1 Installation and Operation Manual

2.4 ODU Performance Monitoring

RSSI - A voltage provided through a BNC connector on the outside of the ODU. The RSSI port is used for antenna alignment during installation and for periodic measurement of Receiver/ Path performance. The RSSI voltage is related to Rx BER from -30 dBm to -90 dBm.

2.5 Theory of Operation

General Overview

The N2-4XE1 is a point to point Wireless Extension operating in the 5.3/5.7 GHz UNII band as authorized in rule sections 15.401 through 15.407. The unit is enclosed in a weather proof outdoor enclosure and is intended to provide data links over distances up to 10 km. The radio in the unit operates full duplex, transmitting and receiving data at the rate of 8.448 Mbps. The radio is modulated using BPSK.

2.5.1 N2-4XE1 Indoor Unit

Circuit Description

The following circuit description is intended to explain the operation of the indoor and outdoor units at the block diagram level. This text is written with the idea that the reader has the block diagram readily available, as it will aid in understanding the signal flow in the radio.

Four E1 rate tributaries are time division multiplexed and input to the IDU protection circuit by means of four panel mounted BNC type connectors. The LIU (Line Interface Unit) converts the 4xE1 data stream from a bipolar HDB3 signal which is input to the Mux/Demux and converts the 4E1 signal to an aggregate signal. The FGPA scrambles the data into a pseudo random pattern which passes the data back to the mux and through an E2 rate line interface to and from the ODU. The microcontroller acts as the processing core to manage all external and internal functions of the IDU/ODU. This includes monitoring the ODU, IDU for alarm conditions, as well as providing SNMP and RS-232 control over the terminal. See Figure 2.3.

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