YDI Wireless CX-DS3-ETH-24 Point to Point 24GHz Microwave Radio User Manual TABLE OF CONTENTS

Download:
Mirror Download [FCC.gov]
Document ID	404884
Application ID	7i0G0GKYVENLeQToCpJzhA==
Document Description	Manual Part 1
Short Term Confidential	No
Permanent Confidential	No
Supercede	No
Document Type	User Manual
Display Format	Adobe Acrobat PDF - pdf
Filesize	200.76kB (2509451 bits)
Date Submitted	2004-03-15 00:00:00
Date Available	2004-03-15 00:00:00
Creation Date	2004-03-15 11:23:57
Producing Software	Acrobat Distiller 4.05 for Windows
Document Lastmod	2004-03-15 11:24:13
Document Title	TABLE OF CONTENTS
Document Creator	Microsoft Word 9.0
Document Author:	Jose Salernitano

Version 1.0
MNL-500224-001
February 2004
Link CX-24 User’s Manual
This document applies to the YDI Wireless (YDI) release of the Link CX-24 product line and to all
subsequent versions and releases of the hardware or software unless otherwise indicated in a new
version or an update package for this edition. The products described in this document are products of
YDI Wireless or its licensers.
YDI Wireless reserves the right to make changes to any products described herein at any time without
notice. YDI Wireless does not assume any responsibility or liability arising out of the application or use of
any product described herein, except as expressly agreed to in writing by YDI Wireless, nor does the
purchase or use of a product from YDI Wireless convey a license under any patent rights, copyrights,
trademark rights, or any other of the intellectual property rights of YDI Wireless or third parties.
Use, duplication, or disclosure by the U.S. Government is subject to restrictions of FAR 52.227-14 (g) (2)
(6/87) and FAR 52.227-19 (6/87), or DFAR 252.227-7015 (b) (6/95) and DFAR 227.7202-3 (a).
The software described in this document is furnished under a license agreement or nondisclosure
agreement. The software may be used or copied only in accordance with the terms of the agreement. It is
a violation of YDI Wireless proprietary rights to copy the software on any medium except as specifically
allowed in the license or nondisclosure agreement.
The Link CX-24 product line is covered by one or more of the following United States Patents: No.
5,577,029, No. 5,654,968, No. 5,682,403, No. 5,721,735, No. 5,734,699, No. 5,734,979, No. 5,761,195,
No. 5,781,582, No. 5,818,824, No. 5,842,138, No. 5,887,256, No. 5,953,651, No. 5,957,464, No.
5,999,813, No. 6,070,071, No. 6,078,823, No. 6,081,716, No. 6,101,400, No. 6,169,907, No. 6,173,177,
No. 6,212,395, No. 6,269,255, No. USP D 391,967, No. USP D 391,968, No. USP D 397,693.
Changes or modifications not expressly approved by YDI Wireless in writing can void the user’s authority
to operate this equipment.
IMPORTANT OPERATING NOTICE
This device is to be exclusively used for fixed point-to-point operation with directional
antennas.
PROFESSIONAL INSTALLATION REQUIRED
The Link CX-24 must be installed as a system by experienced antenna installation
professionals who are familiar with Radio Frequency (RF) issues such as gains and
losses, as well as local building and safety codes. Failure to do so will void the product
warranty and may expose the end user to excessive RF hazard.
Regulations regarding maximum antenna gains, power output and maximum permissible
exposure vary from country to country. It is the responsibility of the end user to operate
within the limits of these regulations and to ensure that the professional installers who
install this device are aware of these regulations. All antennas are intended to be installed
outdoors.
Version 1.0
Page i
February 2004
Link CX-24 User’s Manual
MICROWAVE RADIO RADIATION WARNING
When installed properly, the Link CX-24 radio equipment complies with the limits for
human exposure to radio frequency (RF) fields adopted by the Federal Communications
Commission (FCC). All YDI Wireless 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 front of an open RF connection or RF antenna 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.
FCC NOTICE
This device complies with part 15 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 interference that may cause
undesired operation.
* Note:
The manufacturer is not responsible for any radio or TV interference caused by
unauthorized modifications to this equipment. Such modifications could void the user's
authority to operate the equipment.
These products are labeled with one of the following FCC ID numbers:
FCC ID: NM5-CX-DS3-ETH-24
© 2004 YDI Wireless. All Rights Reserved. No part or parts of this document may be reproduced,
translated, stored in any electronic retrieval system or transmitted, in any form or by any means,
electronic, mechanical, photocopied, recorded or otherwise, without the prior written permission of YDI
Wireless.
Version 1.0
Page ii
February 2004
Link CX-24 User’s Manual
TABLE OF CONTENTS
Section 1
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
Section 2
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
2.10
2.11
2.13
2.14
2.15
2.16
2.17
Installation
12
Monitoring and Trend Analysis
43
Built-In Web Server Interface...................................................................................................... 43
SNMP Network and Element Management Systems ................................................................. 43
Section 4
4.1
4.2
4.3
4.4
4.5
Introduction ................................................................................................................................. 12
Planning a Link CX-24 Network ..................................................................................................12
Site Planning ............................................................................................................................... 13
Planning Element and Network Management Ethernet Links .................................................... 14
Planning DS-3 Links.................................................................................................................... 15
Power Planning ........................................................................................................................... 15
Transmit Power Planning ............................................................................................................ 15
Radio Link Planning .................................................................................................................... 16
Before Installing .......................................................................................................................... 18
Initial Configuration ..................................................................................................................... 21
Mounting the Link CX-24............................................................................................................. 30
Completing the Link CX-24 Installation....................................................................................... 33
Aligning the Antenna ................................................................................................................... 35
Acceptance Testing..................................................................................................................... 37
Final Link CX-24 Configuration ................................................................................................... 40
Updating the Link CX-24 Software.............................................................................................. 41
Section 3
3.1
3.2
Overview
Description .................................................................................................................................... 1
Regulatory Information.................................................................................................................. 1
Products ........................................................................................................................................ 1
Applications ................................................................................................................................... 2
System Overview .......................................................................................................................... 2
Features ........................................................................................................................................ 4
Link CX-24 Basic Structure ........................................................................................................... 4
Typical Applications .................................................................................................................... 11
Specifications .............................................................................................................................. 11
Troubleshooting the Link CX-24
45
Troubleshooting Tables............................................................................................................... 45
Using the Link CX-24 LEDs ........................................................................................................ 45
Using RSSI.................................................................................................................................. 45
Using a Web Browser ................................................................................................................. 46
Customer Support Services ........................................................................................................ 46
Appendix A - Interface Cable Pinouts
47
Appendix B - Technical Specifications
49
Appendix C - Using the Web-Based GUI User Interface
52
C-1 Web Browser Requirements.......................................................................................................... 52
C-2 Connecting A Web Browser........................................................................................................... 52
C-3 Accessing the Link CX-24 Web Pages .......................................................................................... 52
C-4 Link CX-24 Web Pages.................................................................................................................. 52
Version 1.0
Page iii
February 2004
Link CX-24 User’s Manual
Appendix D - Grounding and Lightning Protection
58
D-1 Overview ........................................................................................................................................ 58
D-2 Grounding ...................................................................................................................................... 58
D-3 Lightning Protection ....................................................................................................................... 59
Appendix E - Enterprise MIBs and Traps
61
E-1 Enterprise MIBs.............................................................................................................................. 61
E-2 Enterprise Traps............................................................................................................................. 79
Bibliography
80
FIGURES
Figure 1.1 – Link CX-24 Power Supply .................................................................................................. 2
Figure 1.2 – Typical Radio Link Configurations...................................................................................... 3
Figure 1.3 – Link CX-24 Star Network .................................................................................................... 3
Figure 1.4 – Link CX-24 Interface Connectors and Indicators ............................................................... 5
Figure 1.5 – Integral Antenna and Link CX-24 Radio.............................................................................7
Figure 2.1 – Preventing Multi-path Fading from Ground-Level Surfaces ............................................. 13
Figure 2.2 – Typical EMS/NMS Ethernet Connections ........................................................................ 15
Figure 2.3 – Link CX-24 Orderable Parts ............................................................................................. 20
Figure 2.4a – Link CX-24 Configuration Setup..................................................................................... 22
Figure 2.4b – Link CX-24 Positive-Ground Power Connections .......................................................... 23
Figure 2.4c – Link CX-24 Negative-Ground Power Connections ......................................................... 23
Figure 2.5 – Typical DS-3 Link CX-24 Monitor Web Page ................................................................... 24
Figure 2.6 – Typical Ethernet Link CX-24 Monitor Web Page.............................................................. 25
Figure 2.7 – Typical DS-3 Link CX-24 Commission Radio Web Page................................................. 25
Figure 2.8 – Typical Ethernet Link CX-24 Commission Radio Web Page ........................................... 26
Figure 2.9 – Typical DS-3 Link CX-24 Commission Manager Web Page ............................................ 27
Figure 2.10 – Typical Ethernet Link CX-24 Commission Manager Web Page .................................... 28
Figure 2.11 – Typical Link CX-24 DS-3 Test Web Page ...................................................................... 29
Figure 2.12 – Link CX-24 Mounting Components ................................................................................ 30
Version 1.0
Page iv
February 2004
Link CX-24 User’s Manual
Figure 2.13 – Setting the Link CX-24 Polarization – Vertical Polarization Shown ............................... 31
Figure 2.14 – Detail Showing Assembly of Pole Mounting Bracket to Unit (Vertical Polarization) ...... 32
Figure 2.15 – Attaching the Link CX-24 Unit to the Pole...................................................................... 33
Figure 2.16 – Connecting an Earth Ground to the Link CX-24............................................................. 34
Figure 2.17 – Final Line-of-Sight Adjustment and Signal Optimization ................................................ 36
Figure 2.18 – Typical DS-3 Update Software Web Page ..................................................................... 41
Figure 2.19 – Typical Ethernet Update Software Web Page................................................................ 41
Figure C.1 – Link CX-24 Login Window (all models)............................................................................ 52
Figure C.2 – Link CX-24 DS-3 Monitor Web Page ............................................................................... 53
Figure C.3 – Link CX-24 DS-3 Commission Radio Web Page............................................................. 53
Figure C.4 – Link CX-24 DS-3 Commission Manager Web Page........................................................ 54
Figure C.5 – Link CX-24 DS-3 Test Web Page .................................................................................... 55
Figure C.6 – Link CX-24 DS-3 Update Software Web Page ................................................................ 55
Figure C.7 – Link CX-24 Ethernet Monitor Web Page ......................................................................... 56
Figure C.8 – Link CX-24 Ethernet Commission Radio Web Page ....................................................... 56
Figure C.9 – Link CX-24 Ethernet Commission Manager Web Page .................................................. 57
Figure C.10 – Link CX-24 Ethernet Test Web Page ............................................................................ 57
Figure C.11 – Link CX-24 Ethernet Update Software Web Page......................................................... 57
Version 1.0
Page v
February 2004
Link CX-24 User’s Manual
TABLES
Table 1.1 – Link CX-24 Models .............................................................................................................. 4
Table 1.2 – Link CX-24 Interface Connectors and Indicators................................................................. 6
Table 2.1 – Maximum Power Output by Model Configuration.............................................................. 16
Table 2.2 – Radio Link Planning Worksheet ........................................................................................ 16
Table 2.2 – Radio Link Planning Worksheet (continued) ..................................................................... 17
Table 2.2 – Radio Link Planning Worksheet (continued) ..................................................................... 18
Table 2.3 – Link CX-24 Radio Orderable Parts .................................................................................... 20
Table 2.4 – Required Installation Tools ................................................................................................ 21
Table 2.5 – Physical Installation Checklist ........................................................................................... 37
Table 2.6 – Electrical Connection Checklist ......................................................................................... 38
Table 2.7 – DS-3 Internal Circuit and Radio Link Checklist ................................................................. 39
Table 2.8 – Ethernet Internal Circuit and Radio Link Checklist ............................................................ 39
Table 4.1 – Symptoms and Probable Causes ...................................................................................... 45
Table 4.2 – LEDs and Alarm Indication Modes ....................................................................................45
Table A.1 – DS-3 Data Cables ............................................................................................................. 47
Table A.2 – 10/100 Ethernet Data or Control Cable............................................................................. 47
Table A.3 – DC Power Cable................................................................................................................ 47
Table A.4 – 10/100 Ethernet Crossover Cable..................................................................................... 48
Table A.5 – RS-232 CLI Craft PC Cable .............................................................................................. 48
Table B.1 – Link CX-24 DS-3 or Ethernet Version (24 GHz) ............................................................... 49
Table B.1 – Link CX-24 DS-3 or Ethernet Version (24GHz) (continued) ............................................. 50
Table B.2 – Integral Reflector Antenna ................................................................................................ 51
Version 1.0
Page vi
February 2004
Link CX-24 User’s Manual
Section 1
Overview
1.1
Description
This manual is intended for the technical personnel who will install and operate the Link CX-24. Such
personnel are typically experienced and skilled technicians familiar with on site, physical installation and
connection of equipment, including maintenance work. It is also intended for system administration
personnel performing initial configuration and subsequent system reconfiguration, as well as current
system maintenance activities.
1.2
Regulatory Information
1.2.1
FCC Compliance
The Link CX-24 is FCC certified for use in the 24 GHz unlicensed band in the United States.
24GHz (24.05-24.250 GHz)
When deployed in an area regulated by the FCC, Link CX-24 radios operate under the FCC Part 15.249
band regulations for intentional radiators in a point-to-point configuration. The Link CX-24 radios are
equipped with an integral antenna.
1.2.2
Other Regulation Compliance
Other countries have varying RF licensing and operating requirements, and it is imperative that operators
and professional installers ensure that the Link CX-24 is configured and installed per regional regulations.
1.3
Products
The Link CX-24 product is a cost-effective, all-outdoor, pole-mounted, high-capacity, line-of-sight (LOS)
digital radio transmission system, operating in the license-exempt 24.05-24.250 GHz (24GHz) frequency
band. The Link CX-24 can be used for the following applications: point-to-point or building-to-building,
WLL (wireless local loop), backup solutions, temporary links, and mesh cellular backhaul.
•
The Link CX-24 DS-3 and 10/100 versions conform to the FCC (Federal Communications
Commission) Part 15.249 It operates at up to 0 dBm average transmit power, and is intended for
medium-distance use.
The Link CX-24 provides either a standard DS-3 (44.736 Mbps) interface adhering to Bellcore GR-499CORE (DSX-3) standards, or provide two Ethernet 10/100Base-T interfaces adhering to IEEE 802.3
standards, with a combined nominal line rate of 45 Mbps.
Each Link CX-24 is powered by a 110/220 VAC to 48 VDC power supply (see Figure 1.1).
Version 1.0
Page 1
February 2004
Link CX-24 User’s Manual
Figure 1.1 – Link CX-24 Power Supply
1.4
Applications
The Link CX-24 product line is designed to serve the following communications markets:
•
•
•
•
•
1.5
Internet Access and Backhaul Systems: Used by Internet Service Providers (ISPs).
Private Networks: Wireless Bridged LANs and WANs.
PCS/PCN and Cellular Networks: High-speed links between base stations.
Wireless Local Loop Networks: Fixed wireless, used by Local Exchange Carriers (LECs).
Business Bypass or Local Exchange Bypass: Provided by Competitive Access Providers (CAPs)
and Competitive Local Exchange Carriers (CLECs).
System Overview
Each Link CX-24 consists of a Link CX-24 radio, with integral antenna as shown in Figure 1.2, along with
external power and data cabling. In a typical installation, the Link CX-24 radio with integral antenna is
mounted outdoors, usually on a tower or building.
See Figure 1.2. A radio system, or link, contains two Link CX-24 radios with integral antenna, installed at
each end of the link, separated by a line of sight transmission path. Frequency band, terrain, actual lineof-sight and environmental conditions influence the range of operation and path performance.
The Link CX-24 carries one full-duplex DS-3, or Ethernet channel, and is powered by a 48-watt external
48 VDC power supply.
Version 1.0
Page 2
February 2004
Link CX-24 User’s Manual
Figure 1.2 – Typical Radio Link Configurations
Because the Link CX-24 offers both high and low channels in a single band, and can be installed with
horizontal or vertical polarization, up to four Link CX-24 radios can be mounted at each hub, or node, to
form part of a star or mesh network. See Figure 1.3.
Figure 1.3 – Link CX-24 Star Network
This is one sample
configuration. Many other
combinations of channels
and frequencies are possible.
1H 24
2V 24
2H 24
1H = Channel 1,
Horizontal
1V 24
Version 1.0
Page 3
2V = Channel 2,
Vertical
February 2004
Link CX-24 User’s Manual
1.6
Features
The Link CX-24 offers the following features:
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Robust all-outdoor enclosure.
Integral antenna.
Sturdy radio mounting systems for quick, accurate and reliable integral antenna alignment.
Operates in the license-exempt 24.05-24.250GHz (24GHz) band.
Full-duplex transmission:
DS-3 (DSX-3, per Bellcore GR-499-CORE)
Ethernet 10/100Base-T (per IEEE 802.3)
Easy configuration, installation, operation, and maintenance.
Integral web server for configuring, operating, and monitoring using an HTML-based web browser
GUI.
Ethernet interface used with NMSs (Network Management Systems) or EMSs (Element
Management Systems) using SNMP (Simple Network Management Protocol) traps. Supports
MIB-II (Management Information Base II) and YDI Wireless enterprise MIB.
ATPC (Automatic Transmit Power Control).
Self Test, BER test mode, RF and digital loop-backs.
Reed Salomon Forward Error Correction (FEC).
Operating and backup software versions contained in Link CX-24 memory, operator-selectable.
1.7
Link CX-24 Basic Structure
1.7.1
Radio Links
Each radio link includes two Link CX-24 terminals. Each terminal consists of a Link CX-24 radio with an
integral 12” diameter reflector antenna. Generally, the Link CX-24 terminals are mounted outdoors on a
tower or building.
1.7.2
Data Stream
The DS-3 or Ethernet data signals enter the Link CX-24 and are modulated into the RF data stream. The
RF radio signal radiates from the local antenna and propagates to the remote antenna. At the remote
terminal, the received signal is demodulated and de-multiplexed, separating the payload data and the
overhead management data.
1.7.3
Link CX-24 Models
The Link CX-24 is manufactured in two configurations, namely versions with DS-3 or Ethernet carried
over the 24GHz link.
Link CX-24 models are described in Table 1.1.
Table 1.1 – Link CX-24 Models
Model
Transmit
Band
Frequency
Band
Link
Carries
CX-DS3-24-LO High
CX-DS3-24-HI Low
24.05-24.250 GHz DS-3
CX-ETH-24-LO High
CX-ETH-24-HI Low
24.05-24.250 GHz
Version 1.0
Ethernet
(45 Mbps)
Page 4
Antenna
Integral 12” reflector
Integral 12” reflector
February 2004
Link CX-24 User’s Manual
1.7.4
Mounting and Antenna Alignment
To ensure proper mounting and antenna alignment, YDI sells a mounting bracket designed for use with
the Link CX-24. The single bracket mounts one Link CX-24. The bracket is designed to provide rugged
mounting for the Link CX-24, while allowing fine adjustment for antenna alignment.
1.7.5
Interface Connectors and Indicators
See Figure 1.4 for a view of the Link CX-24 external connectors and indicators. The Link CX-24
connectors and indicators are described in Table 1.2.
Figure 1.4 – Link CX-24 Interface Connectors and Indicators
Version 1.0
Page 5
February 2004
Link CX-24 User’s Manual
Table 1.2 – Link CX-24 Interface Connectors and Indicators
No.
Name
Component
Description
From
Note
POWER
Male 4-Pin
Circular
Connector
Power input
plug
Power Supply Accepts ±21 to ±60 VDC
CRAFT
Female 4-Pin
Circular
Connector
RS-232
receptacle
1200 to 115,200 baud,
Asynchronous
used only for tech support
laptop port
troubleshooting
RSSI
Female BNC
Connector
Receive Signal
Voltmeter
Level Indicator
Verifies RF signal strength,
used to align antenna
OUT
Female TNC
Connector
DS-3 data from DS-3 data
the radio link
equipment
--
IN
Female TNC
Connector
DS-3 data to
the radio link
--
ETHERNET 2
Female 4-Pin
Circular
Connector
10/100Base-T
transmit and
receive
receptacle
Ethernet
equipment
For Ethernet data or link to
SNMP or Web manager,
or use to daisy-chain
Ethernet port to next Link
CX-24 in cascade
ETHERNET 1
Female 4-Pin
Circular
Connector
10/100Base-T
transmit and
receive
receptacle
Ethernet
equipment
(Same as ETHERNET 2)
PWR/LCL ALM
Green LED
Power/Local
Alarm Status
ON = Power OK, no alarm,
Flashing = Local alarm,
OFF = Power off.
RF LINK
Green LED
Radio Link
Status
ON = Rcv. OK,
OFF = Link Alarm.
DATA
Green LED
DS-3 Status
ENET 2
Green LED
Ethernet Status
ON = OK,
Flashing = data,
OFF = No conn.
ENET 1
Green LED
Ethernet Status
ON = OK,
Flashing = data,
OFF = No conn.
Note:
Version 1.0
DS-3 data
equipment
--
ON = OK (no LOS),
OFF = LOS.
For connector pin-outs, refer to Appendix A.
Page 6
February 2004
Link CX-24 User’s Manual
1.7.6
Cables
To ensure longevity in an outdoor environment, YDI sells various cables designed for use with the Link
CX-24.YDI offers the following weather-resistant cables:
•
•
•
DS-3, Ethernet data cables and the power cables are offered in 25 m (82 ft.), 50 m (164 ft.), and
100 m (328 ft.) lengths.
A 6 m (19.7 ft.) Ethernet cable is available to route the Ethernet signal between two Link CX-24 in
the same location, or when you are configuring the Link CX-24 from a Craft PC.
A 6 m (19.7 ft.) RS-232 4-pin Circular-to-DB9 Craft cable is available to connect a Craft PC to a
Link CX-24 for future CLI applications.
All of the cables described above include weather-resistant connectors.
1.7.7
Integral Antenna
The integral antenna is a 12” diameter reflector antenna mounted directly on the Link CX-24 radio
chassis, as shown in Figure 1.5. All RF connections between the integral antenna and the Link CX-24
radio are made internally, eliminating the need for external coaxial cabling. Because the integral antenna
is sealed onto the Link CX-24 chassis, the Link CX-24 and integral antenna are mounted as a unit, and
share the same environmental protection. An arrow on the connector side of the Link CX-24 chassis
indicates the antenna polarization (either vertical or horizontal).
Figure 1.5 – Integral Antenna and Link CX-24 Radio
Integral antenna
Link CX-24 radio
Version 1.0
Page 7
February 2004
Link CX-24 User’s Manual
1.7.8
Configuration, Operation, and Monitoring
The Link CX-24 and radio link are configured, operated and monitored through one of five user interfaces.
The five interfaces are:
•
•
•
•
•
1.7.9
A built-in web server GUI hosted by the Link CX-24, which can be accessed by any local or
remote computer equipped with a web browser. This is the interface most operators will use to
interact with the Link CX-24. The web browser can access the Link CX-24 built-in web server
through either the ETHERNET 1 or ETHERNET 2 port.
Note that the ETHERNET 1 and ETHERNET 2 ports are functionally equivalent, and that they are
both served by an onboard Ethernet controller. The controller automatically switches polarity on
the transmit and receive pairs when they are reversed, eliminating the need for crossover cables.
SNMP traps, which communicate with MIB-II compliant NMSs (Network Management Systems)
and EMSs (Element Management Systems). This interface is used by operators who want realtime notification of radio problems. The Link CX-24 sends SNMP traps to NMSs and EMSs over
Ethernet links through either the ETHERNET 1 or ETHERNET 2 port.
An ASCII command line interface, accessible through the RS-232 Craft port, or through the
ETHERNET 1 or ETHERNET 2 port using telnet. This interface is primarily used by YDI technical
support personnel when performing detailed troubleshooting.
The RSSI port, providing a DC voltage level proportionate to the received RF signal level, and
allowing installers to use a DC voltmeter to fine-tune antenna alignment. This interface is primarily
used during installation, but the current RSSI measurement is also available via the Link CX-24
built-in web server or via SNMP polls.
Five LEDs that provide visual alarm status. They verify proper operation of the Ethernet ports,
DS3 ports, and radio link, and indicate proper power input and radio operation. These LEDs are
usually used during installation to provide a quick product verification.
SNMP
The Link CX-24 radio supports SNMP network management. SNMP is a protocol that defines the method
of communicating with and controlling network devices.
Devices that support the SNMP protocol can be queried for their status and other device information.
Some devices allow changing device settings or configurations using SNMP commands. The device
settings and other device data are available as variables. They are defined in the standard Management
Information Base (MIB) file, provided by the device manufacturer. The SNMP manager uses a database
to hold lists of variables that can be accessed for each device on the network. The device data can be
displayed in tables, graphs, or saved in a file.
1.7.10 Link CX-24 Network Management Architecture
Link CX-24 software network management is comprised of two main items:
•
•
SNMP based Network Management System (NMS) application in the network management
workstation.
SNMP agent in the Link CX-24.
The workstation manages all Link CX-24 assigned unique IP addresses. The workstation also provides a
graphical display of the network objects showing the status, performance, and configuration parameters
of each Link CX-24 radio.
The SNMP local agent is a standard MIB-II compliant software module that resides in each Link CX-24.
The agent collects information from different Link CX-24 components as defined in the Management
Information Base (MIB) structure. The Link CX-24 incorporates both standard and private MIBs.
Different Link CX-24s are distinguished by their customer-assigned IP addresses. The Web browser
Version 1.0
Page 8
February 2004
Link CX-24 User’s Manual
communicates with the Link CX-24 using TCP/IP (Transmission Control Protocol/Internet Protocol) and
HTTP (Hyper Text Transfer Protocol).
The NMS data transfer between the manager and the agents is accomplished using either polling or
trapping techniques.
Polling
The NMS polls each Link CX-24 SNMP agent at specific intervals. These are set according to user
requirements during SNMP NMS configuration.
Traps
The Link CX-24 agent sends an SNMP trap to the manager whenever a predefined event occurs. Groups
of traps can be defined according to their level of severity. The operator can choose to enable or disable
any traps or group of traps according to their level of severity (and his or her own security level). Traps
can be logged using any standard SNMP manager.
1.7.11 NMS Connectivity
The NMS workstation can access any Link CX-24 using its IP address. The NMS workstation can connect
to each Link CX-24 using any of the following methods:
•
•
10/100 Base-T Ethernet – accessing Link CX-24s via a LAN through hubs, switches or routers.
Cascading Ethernet links transport NMS information between collocated Link CX-24s. This is
done by daisy-chaining the ETHERNET 1 and ETHERNET 2 ports between Link CX-24 radios
using straight-pinned or crossover Ethernet cables.
1.7.12 Web-Based GUI Access Security
Access to the Web-based GUI (graphical user interface) is limited by username and password, which is
available at different levels of security as follows:
•
•
•
User – Read only privilege.
Administrator – Read/partial write privilege. The administrator cannot cause a radio link to reset
by changing critical parameters.
Supervisor – Full read/write privilege.
1.7.13 GUI Functions
The Web-based GUI monitors and controls the main functions of the Link CX-24. These functions are
listed below and detailed in the following sections:
•
•
•
•
•
Configuration management
Status and fault management
Test activation and monitoring
Software downloading
Performance monitoring
Refer to Appendix C for Link CX-24 GUI operating instructions.
Configuration Management
The NMS software can be used to configure the parameters of the Link CX-24 radio, although this is
normally done using a web browser GUI. This includes the setup of templates with predetermined default
values, relating to both the parameters of common element types and the validation of parameter values.
It also includes saving and loading configuration files for individual Link CX-24 radios.
The NMS also controls the uploading and downloading of individual parameter values, and complete
configuration setups.
Version 1.0
Page 9
February 2004
Link CX-24 User’s Manual
Parameter configuration is terminal-oriented. Every configuration session deals with the Link CX-24 as
accessed by its particular IP address. Some of the parameters, such as RF channel number, link ID, etc.
affect the Link CX-24s on both ends of the radio link. Special care should be taken to activate the new
parameter values consistently on both ends of the radio link.
Status and Fault Management
Status and fault management involve a selective display of failures alerting the user to take actions
according to a decision making tree.
Some status indications and alarms may report conditions that pertain to both ends of the radio link.
These ends are commonly referred to as local and remote.
Note that the ‘local’ system is the Link CX-24 you are logged into, and the ‘remote’ Link CX-24 is the one
at the far end of the radio link. Thus, when you are logged into the far end Link CX-24 on a radio link that
terminates at your current physical location, the far end Link CX-24 is ‘local’ and the near end Link CX-24
is ‘remote’.
Test Activation and Monitoring
Following is a brief description of the tests that can be invoked and monitored by the Web based NMS.
Loop-backs
The loop-backs are incorporated into the radio to assist in detecting equipment/component/cable failure
during both installation and normal operations. Loop-backs are user initiated. The Link CX-24 DS-3 and
versions support RF and various interface loop-backs. (Note that loop-backs are not supported on the
Link CX-24 Ethernet versions, as any loop-back could result in an immediate data storm. Instead, YDI
recommends that customers use external equipment to Ping (use Packet Internet Groper) to test their
Ethernet paths.
BER Test
The following Bit Error Rate (BER) test is provided by the DS-3 and Link CX-24 versions:
• Pseudo random signal generator - capable of inserting a standard test signal for BER
measurements, and local- and remote-end loop-back functions.
• BER measurements of radio link performance under normal operating conditions.
Software Downloading
The Web-based user interface enables off-line operation and SNMP updates of files. Alternatively, when
on-line, configuration can be updated from the NMS to the Link CX-24 agent. Another way to upgrade
multiple Link CX-24s is to use FTP (File Transfer Protocol).
Note that the Link CX-24 can hold two software loads in memory, which facilitates upgrading and
reverting to a previous software version.
Some factory default software settings are always retained at the Link CX-24 to safeguard against
complete failure of communications caused by equipment restart.
Performance Monitoring
Each Link CX-24 gathers various statistics regarding radio link performance. The Web based user
interface can retrieve and analyze these statistics upon demand. In addition, the Web based user
interface manager processes its own general statistical data, based on the information that is received.
Current BER, Receive Signal Strength Indicator (RSSI), and other performance monitors are available for
the radio link.
The Web-based user interface is designed to easily interface with optional graph management software
packages for sophisticated performance presentation.
Version 1.0
Page 10
February 2004
Link CX-24 User’s Manual
1.8
Typical Applications
Link CX-24 gives the user great flexibility in setting up point-to-point radio links on a very cost effective
basis, because it avoids unnecessary outlays in expensive leased lines or fiber optic land-based lines.
Low cost of ownership makes return on investment (ROI) attractive compared to leased lines.
Link CX-24 advantages over copper/fiber alternatives include: short installation time, easy maintenance
using NMS software, independence of competing PTTs, avoiding the need to secure normal right-of-way
and/or physical installation permits, and ability to re-deploy in order to meet changing needs.
The simplicity of the Link CX-24 installation makes it easy for the user to implement Link CX-24 in a
variety of applications. It also means that the user can conveniently move a previously installed Link CX24 to a new location to meet the requirements of a changing system. Link CX-24 enables seamless future
software upgradability, protecting customer investment, reducing logistics, spare parts and product
stocking. The following sections briefly describe typical applications.
1.8.1
Internet (ISP)
The appetite for higher Internet access speeds requires faster ISP access and backhaul and ISP
connections to businesses. The Link CX-24 radio is perfectly suitable for both backbone and direct enduser connectivity.
1.8.2
Private Network Wireless Bridged LANs and WANs
Link CX-24 radios are also used to provide communications links for private networks. For companies
requiring frequent communications into areas without extensive telecommunications infrastructure or in
areas where the cost of local access is high, installing and maintaining a Link CX-24 radio network can be
very cost effective. Typical users of private networks include: government agencies such as land
management, municipal agencies, and universities; large utilities such as oil, gas, and electric concerns;
and companies with widely deployed assets such as railroads and timber resource managers.
1.8.3
PCS/PCN and Cellular Networks
Cellular operators mainly use Link CX-24 radio links for Base Transceiver Station (BTS) interconnections,
BTS to Base Station Controller (BSC), and BSC to BSC interconnections.
1.8.4
Wireless Local Loop Networks and Local Exchange Bypass
Wireless systems in emerging markets were originally deployed to provide premium services to a mobile
subscriber base. However, middle and lower income countries have driven mobile network providers into
a new business - the substitution of wireless service for fixed service, so-called fixed wireless networks,
providing a cost-effective solution in situations where no wireless infrastructure exists. Wireless local loop
(last mile) networks are implemented mostly by Local Exchange Carriers (LECs).
Alternative carriers, such as Competitive Access Providers (CAPs) and Competitive Local Exchange
Carriers (CLECs) use radio links to establish standard telecommunications links between their customers’
sites and their own backbone networks. This way CAPs and CLECs provide their customers with costeffective local area telephone service and cheaper long distance services.
1.8.5
Business Bypass and Local Exchange Bypass
The Link CX-24 radio is a perfect solution for Business Bypass and Local Exchange Bypass applications.
1.9
Specifications
Refer to Appendix B for Link CX-24 specifications.
Version 1.0
Page 11
February 2004
Link CX-24 User’s Manual
Section 2
Installation
Safety Warning
CAUTION
2.1
This antenna/transmitter device must be fixed-mounted on outdoor
permanent structures with a separation distance of at least 2 meters
(6.56 feet) from all persons. Users and installers must adhere to the
antenna installation instructions and transmitter operating conditions in
order to comply with the FCC’s RF exposure requirements.
Introduction
The Link CX-24 is intended for professional installation only. However, this manual is also designed for
personnel who plan, operate and administer the Link CX-24 communication system. Please review the
entire manual before powering up or deploying any Link CX-24.
Note:
2.2
It is strongly recommended that you configure and test the units prior to deploying them in the
field. Set up a “mini-network” that resembles your actual configuration as close as possible.
By using such a mock-up, troubleshooting potential problems will be much easier than if you
already installed the equipment in the field. Read through this entire Section 2 to understand
how to install the hardware.
Planning a Link CX-24 Network
As described in Section 1.8, the Link CX-24 can be used to support a number of applications. However,
the most common configuration is a point-to-point network. Point-to-point configurations (Figure 1.1) are
easiest to plan and implement, as the radio links merely transmit industry-standard formatted data from
one location to another.
Generally, the common points to consider when planning a Link CX-24 network are:
Line of Sight: Unlike some frequency bands, the Link CX-24 radios must be within line of sight of each
other. That is, the far-end antenna must be visible from the near-end antenna. If there are trees,
buildings, mountains, or other obstructions between the two antennas, the Link CX-24s on each end of
the radio link will be unable to communicate with each other. Make sure the Link CX-24 radios used in
each radio link are within line of sight of each other. Refer also to the Fresnel Zone Clearance section that
follows.
Fresnel Zone Clearance: There must be sufficient open space around the direct line of sight to minimize
interference with the radio beam. At a minimum, 60% of the first Fresnel zone of the path should be clear.
Even with clear line-of-sight, objects still may be near enough to the transmission path to cause problems.
Obviously, objects that stand directly in the transmission path obstruct the beam, causing a drop in signal
strength at the receiving end; in addition, objects and reflective surfaces that are in near proximity to the
path can cause signal interference and attenuation of the received signal.
Fresnel zones define the amount of clearance required for obstacles. These zones are series of
concentric ellipsoid surfaces that surround the straight-line path between the two antennas. The first
Fresnel zone is defined as the surface containing every point for which the distance from the transmitter
to any reflection point on the surface and then on to the receiver is one-half wavelength longer than the
Version 1.0
Page 12
February 2004
Link CX-24 User’s Manual
direct signal path. The Fresnel zone surrounds the direct signal path, so it affects objects to the side of
the path as well as objects directly in the path.
For a calculation of the Fresnel Clearance Zone, please refer to:
http://www.ydi.com/calculation/fresnel-zone.php.
Multipath Fading: See Figure 2.1. Because a Link CX-24 terminal typically transmits its strongest signals
in a cone-shaped pattern, some of the signal may be reflected from a nearby building, from water under
the signal path, or from other RF reflectors. This reflected signal can then be received by the far-end Link
CX-24 and superimposed on the main signal, usually degrading the signal strength. To avoid multi-path
fading, YDI recommends that you install the Link CX-24 antenna on the back, rather than the front, of
buildings to avoid multi-path fading from water or other ground-level surfaces, and that you plan radio
links away from nearby buildings.
Figure 2.1 – Preventing Multi-path Fading from Ground-Level Surfaces
External Interference: Because the Link CX-24 operates in an unlicensed band, YDI strongly
recommends that you use a spectrum analyzer at both ends of planned radio links, with the receiving
antenna as close to the proposed Link CX-24 antenna mounting spot as possible. Use a polarized
antenna, and scan for both horizontally- and vertically-polarized interfering radiation. If you find external
interference in either of the two (High or Low) bands, configure the Link CX-24 for the least-impacted
band. Refer to Table 2.2 for the High and Low bands for the Link CX-24 radio.
2.3
Site Planning
Each proposed Link CX-24 terminal site requires a site survey and plan for the following:
Power: The Link CX-24 radio requires a +/-21 to +/-60 VDC power source. Make sure required power
supply is available before installing the Link CX-24.
Mounting Point: The Link CX-24 is usually mounted on a vertical mast or pole mounted on a building or
a tower. The Link CX-24 mounting bracket can accommodate a 4.5 to 7.6cm (1.75” to 3” OD) diameter
mast or pole.
Grounding and Lightning Protection: The Link CX-24 radio requires adequate grounding and lightning
Version 1.0
Page 13
February 2004
Link CX-24 User’s Manual
protection. If the mounting point described above provides adequate lightning protection, the Link CX-24
radio will still need a good earth ground to a bare-metal earth ground. Refer to Appendix D for detailed
grounding and lightning protection recommendations.
Cable Routing: The Link CX-24 DS-3, and/or Ethernet data cables connect associated external
equipment to the Link CX-24 radio. Before installation, procure cable ties and/or standoffs to route and to
create service loops for these cables.
Physical Security: The Link CX-24 radio is typically mounted high enough to prevent casual tampering.
The Link CX-24 radio is further protected by anti-tampering chassis screws that prevent most casual
attempts to open the chassis.
2.4
Planning Element and Network Management Ethernet Links
2.4.1
Links From the EMS or NMS to the Link CX-24
The Link CX-24 communicates with SNMP-based Element Management Systems and Network
Management Systems over Ethernet communication links. Because the Link CX-24 contains two
independent switched Ethernet ports, one Link CX-24 can be connected directly to an Ethernet switch or
router, and collocated Link CX-24s can be cascaded. Figure 2.2 shows some common arrangements for
the EMS and/or NMS Ethernet links.
The cable run from the Ethernet switch or router to the Link CX-24 must be 100 m (328 ft.) or less, and
can be straight-through or crossover, because the Link CX-24 Ethernet ports automatically detect the
transmit and receive pairs and switch them if necessary. YDI sells 25 m (82 ft.), 50 m (14 ft.), and 100 m
(328 ft.) Ethernet cables with the correct connectors for these links, as described in Section 1.7.6.
Alternatively, when Link CX-24s are to be cascaded as shown in Figure 2.2 (B), YDI sells a 6 m (20 ft.)
Ethernet cable with the correct connectors for the Link CX-24-to-Link CX-24 links, as described in Section
1.7.6. Note that the EMS or NMS must be within eight or fewer Ethernet hops of the Link CX-24 for proper
communications.
2.4.2
Links Between Link CX-24s
As shown in Figure 2.2, the near end Link CX-24 automatically sets up an Ethernet connection to the Link
CX-24 at the far end of each radio system, or link. In Ethernet models, the in-band Ethernet connection
uses the payload data Ethernet link, while in DS-3 models the Ethernet connection is out-of-band, and
does not interfere with the DS-3 payload data. Because the Link CX-24-to-Link CX-24 Ethernet
connection cannot be turned off, make sure you do not connect both ends of the Link CX-24-to-Link CX24 to the Ethernet. This will help prevent Ethernet loops and potential data storms.
Version 1.0
Page 14
February 2004
Link CX-24 User’s Manual
Figure 2.2 – Typical EMS/NMS Ethernet Connections
2.5
Planning DS-3 Links
The Link CX-24 DS-3 version uses paired 75 Ohm cables with male TNC connectors for the transmit and
receive data from external DS-3 equipment. YDI sells 25 m (82 ft.), 50 m (14 ft.), and 100 m (328 ft.) DS-3
cables with the correct connectors for these links, as described in Section 1.7.6.
2.6
Power Planning
YDI sells 25 m (82 ft.), 50 m (14 ft.), and 100 m (328 ft.) power cables with the correct connectors for Link
CX-24 power, as described in Section 1.7.6.
2.7
Transmit Power Planning
The Link CX-24 normally uses a manually-set output power level. When Automatic Transmit Power
Control (ATPC) is enabled, the far-end Link CX-24 terminal provides feedback to the near-end Link CX24 to set the transmit power to the lowest level required for clear data transmission.
Transmit power can be attenuated by 40 dB for initial configuration and interference isolation. Also, a
maximum transmit power level can be set (whether or not ATPC is enabled) between –30 dBm and
0 dBm to prevent interference with other RF receivers.
Version 1.0
Page 15
February 2004
Link CX-24 User’s Manual
2.7.1
Maximum Link CX-24 Power Output
The Link CX-24 can be ordered in two different configurations. Table 2.1 shows the maximum power
output for each case.
Table 2.1 – Maximum Power Output by Model Configuration
Model
CX-DS3-24-HI
CX-DS3-24-LO
CX-ETH-24-HI
CX-ETH-24-LO
2.7.2
Frequency
Band
Link
Carries
Antenna
Max Tx Power
24.05-24.250GHz
-Per FCC
Regulations
DS-3
(45 Mbps)
Integral
0 dBm +34.5 dBi =
+34.5 dBm Average EIRP
24.05-24.250GHz
-Per FCC
Regulations
Ethernet
(45 Mbps)
Integral
0 dBm +34.5 dBi =
+34.5 dBm Average EIRP
Calculating the Required Transmit Power
The Link CX-24 will normally use the maximum transmit power listed in Table 2.1, but may need to be
attenuated when there are other receivers beyond the remote Link CX-24 terminal (for instance, in a
mesh network). In this case, the professional installer must use the free-space calculation to determine
the actual Maximum Transmit Power to prevent interference.
2.8
Radio Link Planning
As described in Section 1.7, each radio link requires a Link CX-24 at each end of the link. Before you start
installing the Link CX-24s, make a copy of Table 2.2 and fill in the information for both ends of the radio
link:
Table 2.2 – Radio Link Planning Worksheet
Link CX-24 1 - High
Link CX-24 2 - Low
Information Common to Both Link CX-24 Radios
Radio Link Name:
Radio Link Information:
Radio Link Polarization (pick one, must be the same for both): HORIZONTAL
VERTICAL
Radio Link Payload (as ordered, must be the same for both):
DS-3
Ethernet
Information Unique to Each Link CX-24 Radio
Model Number
CX- _ _ _ -24- _ _
CX- _ _ _ -24- _ _
(see Link CX-24 Label & Table 1.1)
(high band)
(low band)
Version 1.0
Page 16
February 2004
Link CX-24 User’s Manual
Table 2.2 – Radio Link Planning Worksheet (continued)
Link CX-24 - High Band
Link CX-24 - Low Band
Channel 1 High Band,
Tx– 24.212GHz/
Rx– 24.072GHz (default)
Channel 1 Low Band,
Tx– 24.072GHz/
Rx– 24.212GHz
Channel 2 High Band,
Tx– 24.228GHz/
Rx– 24.088GHz
Channel 2 Low Band,
Tx– 24.088GHz/
Rx– 24.228GHz
Transmit Attenuation
(default = Disabled)
Enabled
Enabled
Maximum Transmit Power
(refer to Section 2.7)
__ dBm
Automatic Tx Power Control
(refer to Section 2.7)
Enabled
IP Address (must be different, obtain from IP
network planner)
___.___.___.___
___.___.___.___
Subnet Mask (obtain from IP network
planner)
___.___.___.___
___.___.___.___
Default Gateway (obtain from IP network
planner)
___.___.___.___
___.___.___.___
RSSI Alarm Level
(default = -70 dBm)
- __ dBm
- __ dBm
Alarm on Loss of DS-3 or
Ethernet Input Signal
Enabled
Radio Link Channel and Band Center
Frequency (pick one pair, each end of the
radio link must be different)
Disabled
Disabled
__ dBm
Disabled
Disabled
Enabled
Enabled
Disabled
Disabled
Login Name (up to 19 printable ASCII
characters) Note that the login name is casesensitive.
Login Password (8 – 19 printable ASCII
characters) Note that the password is casesensitive.
Allow Login From IP Addresses
(don’t forget Craft PC)
Version 1.0
Any (default) –OR___.___.___.___
___.___.___.___
Page 17
Any (default) –OR___.___.___.___
___.___.___.___
February 2004
Link CX-24 User’s Manual
Table 2.2 – Radio Link Planning Worksheet (continued)
Link CX-24 - High Band
Link CX-24 - Low Band
___.___.___.___
___.___.___.___
___.___.___.___
___.___.___.___
___.___.___.___
___.___.___.___
Any (default) -OR___.___.___.___
___.___.___.___
___.___.___.___
Any (default) -OR___.___.___.___
___.___.___.___
___.___.___.___
Any (default) -OR___.___.___.___
Any (default) -OR___.___.___.___
SNMP Trap Community
(default = public, up to 19 ASCII characters
starting with an alpha character, including
numbers and - _ .)
Send SNMP Traps to
Read/Write Community
(default = public, up to 19 ASCII characters
starting with an alpha character, including
numbers and - _ .)
Allow Read/Write Access From
Read-Only Community
(default = public, up to 19 ASCII characters
starting with an alpha character, including
numbers and - _ .)
Allow Read-Only Access From
System Name
(optional, up to 255 ASCII characters)
System Contact Information
(optional, up to 255 ASCII characters)
System Location
(optional, up to 255 ASCII characters)
2.9
Before Installing
2.9.1 General Guidelines
The installation, maintenance, or removal of antenna systems requires qualified, experienced personnel.
Link CX-24 installation instructions have been written for such personnel.
Since Link CX-24 is easy to install, a previously installed Link CX-24 can be conveniently moved to a new
location. Re-deployment allows the user to meet the requirements of a changing system with minimal
effort and expense. Thus, installation personnel should assume that the activities described in this
chapter are not one-time procedures but will have to be repeated from time to time.
This manual assumes that the site power and grounding have already been installed. This manual also
assumes that the antenna mounting pole is in place before installing the Link CX-24. When installing and
aligning a Link CX-24 radio or associated radio link, the user should always have on hand the required
tools, test equipment and any other required miscellaneous installation devices and materials.
Version 1.0
Page 18
February 2004
Link CX-24 User’s Manual
YDI disclaims any liability or responsibility for the results of improper or unsafe installation practices.
This device is to be exclusively used for fixed point-to-point operation with directional antennas.
Before you continue with this installation, make sure you have a filled-out copy of the Radio Link Planning
Worksheet found in Section 2.8.
Note:
The Link CX-24 electronics have been designed to be maintenance free, and the outdoor
components are very rugged. However, because of continued exposure to weather, it is
recommended that qualified personnel inspect antenna systems once a year to verify proper
installation, maintenance, and condition of equipment.
2.9.2 Equipment and Unpacking
Each Link CX-24 radio is shipped with the Link CX-24 User’s Manual and mounting hardware. Unpack
each box and examine the exterior of each unit for any visible damage. If visible damage is detected,
immediately contact your sales representative or YDI Customer Support.
2.9.3 Packing Lists and Orderable Parts
Each packing carton is accompanied by a packing list. Verify the contents of the carton against the
packing list. Regardless of the packing list parts described here, the shipped packing list is binding. Note
the warranty sticker on the Link CX-24. The Link CX-24 radio is sealed at the factory. Tampering with
these seals voids the warranty.
See Table 2.3 for a high-level description of the orderable parts, and see Figure 2.3 for a picture of the
orderable Link CX-24 parts.
YDI suggests that the user retain at least one (1) of each packing carton with all its packing materials. In
the event that it is necessary to return a unit, the user will have the required packing material for safe
shipment.
Version 1.0
Page 19
February 2004
Link CX-24 User’s Manual
Table 2.3 – Link CX-24 Radio Orderable Parts
Item
Description
Link CX-24 Radio, Integral Antenna
Link CX-24 Mounting Bracket
Remarks
All available in
82 ft (25 m),
164 ft (50 m), or
328 ft (100 m)
All available in
82 ft (25 m),
164 ft (50 m), or
328 ft (100 m)
3A
Two each DS-3 Payload Data Cables (see Table A.1),
One 10/100 Ethernet Control Cable (see Table A.2), and
One DC Power Cable (see Table A.3)
3B
Two each 10/100 Ethernet Payload and Control Cables (see Table A.2), and
One Power Cable (see Table A.3)
Link CX-24 to-Link CX-24 10/100 Ethernet Crossover Cable (see Table A.4)
20 ft (6 m)
Optional RS-232 CLI Craft PC 4-pin Circular-to-DB9 Cable (see Table A.6)
20 ft (6 m)
6A
6B
Optional Transtector Lightning Arrestor Kit used at the cable entry to the
Power, DS-3 and 10/100 Ethernet Equipment Structure
Optional Transtector Lightning Arrestor Kit used at the cable entry to the
Power and 10/100 Ethernet Equipment Structure
Power Supply, 110/220 VAC to 48 VDC
Figure 2.3 – Link CX-24 Orderable Parts
Version 1.0
Page 20
February 2004
Link CX-24 User’s Manual
2.9.4 Installation Tools and Materials
Tools
The user should have at least the following tools on hand before installing the Link CX-24 radio:
Table 2.4 – Required Installation Tools
Tools
Purpose
8 mm and 13 mm torque wrench
Tighten the pole mount assembly to the pole
and tighten the alignment lockdown bolts
Optical aid or compass (optional)
Vertical level (optional)
For coarse antenna azimuth alignment
For coarse antenna elevation alignment
Hand-held voltmeter, including cable with
Fine-tune the antenna alignment
BNC adapter
Large Flat-Blade Screwdriver
Tighten the steel band clamps, when required
Materials
Refer to Section 2.9.3 and collect the following materials:
For DS-3 models:
• DS-3 coaxial cables to the Link CX-24.
• Ethernet data interface cable to the Link CX-24.
For Ethernet models:
• Ethernet data interface cables to the Link CX-24.
For all models:
• Power cable to the Link CX-24.
• Optional RS-232 cable to Craft PC command line interface. (Future option.)
• Standoffs and/or tie wraps (or similar) for fastening cables.
• Vinyl (or equivalent) electrical tape.
• Butyl rubber amalgamating connector sealing tape.
• Customer-supplied solid wire or tape (not braided) grounding wire.
• Lightning arrestors.
2.10
Initial Configuration
YDI strongly recommends that the installer configure the Link CX-24 at a depot or on-site before it is
mounted in its final location. This section includes instructions on how to configure the Link CX-24 before
it is installed.
2.10.1 Connecting a Craft PC to the Link CX-24
Note:
For faster configuration, make sure you have a filled-out copy of the Radio Link Planning
Worksheet from Section 2.8 before continuing with the rest of this section.
The equipment used to configure the Link CX-24 is a Craft PC with 10/100 Ethernet port and cable,
equipped with any current web browser and Adobe Acrobat Reader software. Figure 2.4a shows how to
connect the Craft PC and power to the Link CX-24 for initial configuration.
Perform the following steps:
1 If necessary, use the instructions provided with your Craft PC operating system to change the Craft
PC Ethernet address to 10.0.0.1.
Version 1.0
Page 21
February 2004
Link CX-24 User’s Manual
Turn off power to the Craft PC to prevent damage to the Ethernet port receive circuitry.
Using the factory-supplied Ethernet cable, connect an Ethernet-port equipped Craft PC to the Link
CX-24 as shown in Figure 2.4a.
MAKE SURE the antenna is pointing away from your work area before you apply power to the Link
CX-24.
Using the factory-supplied power cable, connect the power supply to the Link CX-24 as shown in
Figure 2.4b for a positive-ground system, or Figure 2.4c for a negative-ground system. Notice that
regardless of the polarity of the ground, the white wire of the power cable that goes to the Link CX-24
must be plugged to the black wire of the power supply cable, and the red wire of the power cable that
goes to the Link CX-24 must be plugged to the white wire of the power supply cable. See also Table
A.6 for cable and connector pinouts.
Turn on power to the Craft PC and verify that the Ethernet port is active. Note that the Link CX-24
Ethernet switch will auto-detect transmit and receive pairs, and you should detect an Ethernet
connection within a few seconds of port activation.
The Link CX-24 is now powered on and transmitting RF, and the Craft PC is now ready to log onto the
Link CX-24 internal web main page.
Figure 2.4a – Link CX-24 Configuration Setup
To 48 VDC
Power Supply
ETHERNET 1
Port
CAT-5 Ethernet
Cable
Craft PC
RJ-45 Ethernet
Port
Version 1.0
Page 22
February 2004
Link CX-24 User’s Manual
Figure 2.4b – Link CX-24 Positive-Ground Power Connections
To Craft PC
White
Black
Red Wire is Connected to Ground
White
Figure 2.4c – Link CX-24 Negative-Ground Power Connections
To Craft PC
Version 1.0
White Wire is Connected to Ground
Black
Red
White
Page 23
February 2004
Link CX-24 User’s Manual
2.10.2 Logging In to the Link CX-24 Built-In Web Server
After you have connected and powered up the Link CX-24 and the Craft PC as described in Section
2.10.1, use the web browser on the Craft PC to log into the Link CX-24 built-in web server as follows:
Launch the web browser per the manufacturer’s instructions.
Open the web page at Ethernet address http://10.0.0.2/ (transmit low models) or http://10.0.0.3/
(transmit high models) in the web browser. If the web browser Ethernet address has been changed,
use the replacement Ethernet address instead of http://10.0.0.x/.
If the Link CX-24 has not been configured for a login and password, continue with Step 11. If the Link
CX-24 has already been configured for a login and password, enter both and continue with Step 11.
10 The web browser displays the Monitor Page, similar to the samples shown in Figure 2.5 or Figure 2.6.
Note that the values shown for each of the parameters will vary, depending on the state of the Link
CX-24.
Figure 2.5 shows a typical DS-3 Link CX-24 Monitor page, while Figure 2.6 shows a typical Ethernet Link
CX-24 Monitor page.
Figure 2.5 – Typical DS-3 Link CX-24 Monitor Web Page
Version 1.0
Page 24
February 2004
Link CX-24 User’s Manual
Figure 2.6 – Typical Ethernet Link CX-24 Monitor Web Page
11 On the Monitor page, select the link for the Commission Radio page. The web browser displays the
Commission Radio page, similar to the samples shown in Figure 2.7 and Figure 2.8.
Figure 2.7 shows a typical DS-3 Link CX-24 Commission Radio page, while Figure 2.8 shows a typical
Ethernet Link CX-24 Commission Radio page.
Figure 2.7 – Typical DS-3 Link CX-24 Commission Radio Web Page
Version 1.0
Page 25
February 2004
Link CX-24 User’s Manual
Figure 2.8 – Typical Ethernet Link CX-24 Commission Radio Web Page
Note:
The Link CX-24 is shipped with Tx Attenuation disabled. Make sure this setting remains
unchanged until the rest of the Link CX-24 configuration steps are completed.
12 Using the data entered on the filled-out copy of the Radio Link Planning Worksheet from Chapter
Three, select the planned configuration choices available on this page, except the final Tx Attenuation
and the Automatic Tx Power Control values. Enable the Tx Attenuation and disable the Automatic Tx
Power Control for now.
13 Click Submit Changes to upload changes to the Link CX-24.
14 On the Commission Radio page, select the link for the Commission Interfaces page. The web
browser displays the Commission Manager Interfaces page, similar to the samples shown in Figure
2.9 and Figure 2.10.
Figure 2.9 shows a typical DS-3 Link CX-24 Commission Manager page, while Figure 2.10 shows a
typical Ethernet Link CX-24 Commission Manager page.
15 Using the data entered on the filled-out copy of the Radio Link Planning Worksheet from Section 2.8,
select the planned configuration choices available on this page.
16 Click Submit Changes to upload changes to the Link CX-24.
If you are commissioning a DS-3 Link CX-24, continue with Step 17. If you are commissioning an
Ethernet Link CX-24, continue with Step 21.
Version 1.0
Page 26
February 2004
Link CX-24 User’s Manual
Figure 2.9 – Typical DS-3 Link CX-24 Commission Manager Web Page
Version 1.0
Page 27
February 2004
Link CX-24 User’s Manual
Figure 2.10 – Typical Ethernet Link CX-24 Commission Manager Web Page
2.10.3 Testing a DS-3 Link CX-24
17 On the Commission Manager Interfaces page, select the link for the Test page. The web browser
displays the Test page, similar to the sample shown in Figure 2.11.
18 On the Test page, select the BERT + Radio Loop-back test, and select One Minute. Select Start Test
to verify the internal Link CX-24 circuitry before installation. When the BERT + Radio Loop-back test
is complete, the Link CX-24 has been configured, and the internal signal generation, transmit,
receive, and detecting circuitry of the Link CX-24 has been tested.
19 On the Test page, select the link for the Commission Radio page. The web browser again displays
the Commission Radio page, similar to the sample shown in Figure 2.7.
20 Continue with Step 25.
Version 1.0
Page 28
February 2004
Link CX-24 User’s Manual
Figure 2.11 – Typical Link CX-24 DS-3 Test Web Page
2.10.4 Testing an Ethernet Link CX-24
21 Connect an external Ethernet device to the ETHERNET 1 or 2 port on the Link CX-24.
22 Use the external Ethernet device to Ping the Link CX-24 at the local Ethernet address configured in
Step 12. Verify that the Link CX-24 responds to the Ping. When the Ping test is complete, the Link
CX-24 has been configured, and the internal Ethernet circuitry of the Link CX-24 has been tested.
23 Disconnect the external Ethernet device from the Link CX-24.
24 Continue with Step 25.
Note:
Do not stand within 2 m (79 in.) of the front of the antenna for prolonged periods during Link
CX-24 operation to avoid harmful RF radiation.
25 On the Commission Radio page, set the Tx Attenuation to disabled. This causes the Link CX-24 to
transmit at the level set by the Maximum Transmit Power parameter.
26 Disconnect power from the Link CX-24 to prepare it for mounting in its final location.
27 Disconnect the Craft PC from the Link CX-24.
Version 1.0
Page 29
February 2004
Link CX-24 User’s Manual
After completing this section, the Link CX-24 radio is configured and partially tested, and is ready to install
as described in Section 2.11.
2.11
Mounting the Link CX-24
The Link CX-24 radio is a sealed unit that installs on a pole.
Notes:
A pole is not supplied with the Link CX-24 and should be in place before attempting
installation.
The body performing the installation is the responsible for preventing any contact or induction
with mains lines at any voltage.
All connectors must be properly water-proofed with all-weather electrical tape such as
Permagum, or equivalent. Do not use Silicon glue.
2.11.1 Installing the Link CX-24 Adapter Bracket
The Link CX-24 unit is installed by using an “X”-shaped adaptor bracket that is secured to the pole with a
pole mounting bracket and a pole clamp. Figure 2.12 shows the components provided to mount the Link
CX-24 unit.
Figure 2.12 – Link CX-24 Mounting Components
Pole Mounting
Bracket
Mounting Hardware
Adaptor (X)
Bracket
Pole Clamp
28
Select the Link CX-24 Polarization
Since the Link CX-24 is equipped with an integral antenna, how the adapter bracket (X) is mounted to the
unit determines whether it is horizontally or vertically polarized. The Link CX-24 mounting brackets are
designed to preserve the selected polarization until the ODU is removed from its adapter bracket (X).
The Link CX-24 ODU has a polarization label on the back. It is an arrow indicating the antenna
polarization of the unit. See Figure 2.13. When attaching the adapter bracket (X) to the ODU for vertical
polarization ensure that the brackets serrated edge lies in a vertical pointing in the same direction as the
polarization arrow on the ODU. See Figure 2.14. For horizontal polarization the ODU should be rotated
through 90 degrees while keeping the adapter bracket (X) orientation fixed.
Note:
Version 1.0
Both ends of the radio link must be identically polarized. The planned polarization is available
from the filled-out copy of the Radio Link Planning Worksheet from Section 2.8.
Page 30
February 2004
Link CX-24 User’s Manual
Figure 2.13 – Setting the Link CX-24 Polarization – Vertical Polarization Shown
29
Install the pole-mount bracket as described below
a) Fit the adaptor bracket (X) to the back of the Link CX-24 unit noting polarization requirements
as discussed above, by aligning the four mounting studs on the back of the unit with the adaptor
bracket holes and securing to the unit using four M5 nuts, flat washers, and lock washers, as
shown in Figure 2.14. Tighten hardware (four places). Torque to 5.7N-m (4.2 lb-ft). Note the
position of the serrated edge of bracket (X).
b) Attach the pole-mounting bracket (A) to adaptor bracket (X) by using one M8 x 40L bolt, flat
washers, lock washer, and nut, as shown in Fig 2.14. Do not tighten at this stage.
IMPORTANT: Ensure that the serrated edges on both brackets, (A) and (X), are facing each
other.
Version 1.0
Page 31
February 2004
Link CX-24 User’s Manual
Figure 2.14 – Detail Showing Assembly of Pole Mounting Bracket to Unit (Vertical Polarization)
Note
polarization
Serrated
Edges
2.11.2 Attaching the Link CX-24 to the Pole
30
Attach the Link CX-24 to the pole as described below:
a) Fasten the Link CX-24 unit to the pole using pole clamp (B) and two M8 x 70 bolts, lock washer,
and flat washer, as shown in Fig 2.15. It may be necessary to use two M8 x 40L bolts if you are
fastening the Link CX-24 to a 1.75” diameter pole. Do not tighten at this stage. The polemounting bracket (A) will accept pole diameters between 1.75” to 3” OD. The Link CX-24 unit
can be mounted to larger pole diameters by discarding pole clamp (B) and replacing it with
metal straps (not included) fastened through slots located on the pole-mounting bracket (A).
b) Finger-tighten the two bolts on the clamp (B). The Link CX-24 mounting bracket assembly
should be able to pivot around the pole and elevate up and down, allowing fine azimuth and
elevation alignment. Use a compass or optical aid to coarsely align the assembly between the
far-end antenna locations
Version 1.0
Page 32
February 2004
Link CX-24 User’s Manual
Figure 2.15 – Attaching the Link CX-24 Unit to the Pole
Slots for optional
metal straps
2.13
Completing the Link CX-24 Installation
The Link CX-24 is now mounted on the pole, and coarse-aligned with the far-end antenna. Continue with
the following steps to complete the Link CX-24 installation.
2.13.1 Mounting the Lightning Arrestor
31
Install a lightning arrestor according to the manufacturer’s instructions, and according to the
guidelines in Appendix D to lessen the chance of damage from lightning strikes.
Note:
YDI strongly recommends that you use a lightning arrestor, such as the Transtector Lightning
Arrestor Kit, at the cable entry to the power, DS-3 and/or Ethernet equipment structure.
2.13.2 Routing the Data and Power Cables from the Lightning Arrestor
32 Route cables from the lightning arrestor through the cable entry to the power, DS-3 and/ or Ethernet
equipment. Leave a minimum of 38 cm (15 inches) of service loop in the cables where they attach to
the lightning arrestor. Avoid tight bends during cable routing and fastening.
33 Connect the power, DS-3 and/or Ethernet cables to the power, DS-3 and/or Ethernet equipment and
the lightning arrestor.
34 Route power, DS-3 and/or Ethernet cables from the lightning arrestor to the Link CX-24. Using cable
ties and/or standoffs, fasten these cables to the structure at 3 m (10 ft.) intervals. Leave a minimum of
38 cm (15 inches) of service loop in the cables where they attach to the Link CX-24 and the lightning
arrestor. Avoid tight bends during cable routing and fastening.
The Link CX-24 has two Ethernet ports, and includes and internal Ethernet switch. However, typical
Ethernet hubs and switches do not have spanning tree capability. MAKE SURE that you make only ONE
Ethernet connection from a hub or switch to the Link CX-24 to prevent broadcast storms.
35 Connect the power, DS-3 and/or Ethernet cables to the lightning arrestor. When you apply power to
Version 1.0
Page 33
February 2004
Link CX-24 User’s Manual
the Link CX-24, it starts transmitting.
36 Connect the power, DS-3 and/or Ethernet cables to the Link CX-24. See Figure 1.3 and Table 1.2 for
the locations and descriptions of the Link CX-24 connectors.
37 Check the LEDs for proper operation. See Figure 1.3 and Table 4.2 for the locations and descriptions
of the Link CX-24 LEDs:
• When power is properly applied to the Link CX-24, the PWR/LCL ALARM LED will be on.
• Because the radio link has not yet been established, the RF LINK LED should be off.
• When the DS-3 equipment is or is not transmitting data to the Link CX-24, the DATA LED should
be on or off, respectively.
• When the Ethernet equipment is transmitting data to the Link CX-24, the ENET 1 and/or ENET 2
LEDs should be on or flashing. When the Ethernet equipment is not transmitting data to the Link
CX-24, the ENET 1 and/or ENET 2 LEDs should be off or flashing as local data is received.
If any of these conditions is not true, troubleshoot the associated equipment and cables.
2.13.3 Grounding the Link CX-24
The Link CX-24 has a grounding lug. Make sure it is connected to a good earth ground using the
guidelines in Appendix D.
38 Following the guidelines in Appendix D, connect a customer-supplied solid wire or tape (not braided)
grounding wire to the grounding lug on the back of the Link CX-24. See Figure 2.16 for the grounding
lug location. Connect the other end of this cable to a proper grounding point.
Figure 2.16 – Connecting an Earth Ground to the Link CX-24
2.13.4 Sealing the Data and Power Cable Connectors
The cables that are terminated outdoors must be sealed at each exposed end to prevent moisture
Version 1.0
Page 34
February 2004
Link CX-24 User’s Manual
incursion and damage. For all exposed connectors, including those between an external antenna and the
Link CX-24, perform the following:
39 Wrap each connector with vinyl or plastic electrical tape.
40 Wrap the vinyl or plastic electrical tape with butyl rubber amalgamating tape to prevent moisture from
permeating the connector.
41 Wrap the butyl rubber amalgamating tape with vinyl or plastic electrical tape.
Continue with Section 2.14 to fine tune the antenna’s azimuth and elevation.
2.14
Aligning the Antenna
This section includes steps used to fine-tune the antenna alignment using RSSI as measured using a
voltmeter. This part of the installation procedure is most easily accomplished with installers at each end of
the radio link who are in communication with one another.
Notes:
i) Failure to follow this antenna alignment procedure may damage your equipment and may
render the radio unusable. Read through the entire procedure before attempting adjustment.
Contact YDI with any questions.
ii) When you apply power to the Link CX-24, it starts transmitting. Do not stand within 2 m (79
in.) of the front of the antenna during Link CX-24 operation to avoid harmful RF radiation.
2.14.1 Adjustable Azimuth/Elevation Mount
Perform Steps 42 through 49 on the local radio. Then, repeat these steps for the remote radio. See
Figure 2.17.
42 Remove the cap from the BNC connector of the remote radio. Attach the hand-held voltmeter and
BNC test lead to the test point.
43 Fine Azimuth Alignment -- Rotate the Link CX-24 mounting bracket on the pole until the proper
azimuth alignment is achieved. It is advised that, in order to ensure the true maximum, you should
adjust through the maximum RSSI reading until the reading clearly drops and continues to drop to
lower level side-lobes. Adjust back until the maximum is again attained. Expected voltage is more
than +1 VDC. The adjustment should be slowly tuned through the peak, and reset at the absolute
maximum before tightening.
44 Fine Elevation Alignment -- Rotate the Link CX-24 mounting bracket until the proper elevation
alignment is achieved. It is advised that, in order to ensure the true maximum, you should adjust
through the maximum RSSI reading until the reading clearly drops and continues to drop to lower
level side-lobes. Adjust back until the maximum is again attained. Expected voltage is more than +1
VDC. The adjustment should be slowly tuned through the peak, and reset at the absolute maximum
before tightening the bolts.
45 Tighten the two Azimuth adjustment bolts while observing the RSSI reading to ensure the azimuth
alignment does not change while tightening. Torque the two M8 galvanized hex bolts to 24 N-m
(17.7 lb-ft).
46 Tighten the Elevation adjustment bolt while observing the RSSI reading to ensure the elevation
alignment does not change while tightening. Torque the M8 galvanized hex bolt to 24 N-m (17.7 lb-ft).
CAUTION: It is possible to obtain a false peak RSSI reading from the signal of a side-lobe. Up to three
different side-lobes on either side of the main lobe may give false peak alignment readings.
Version 1.0
Page 35
February 2004
Link CX-24 User’s Manual
For this reason, it is important that a wide sweep in both azimuth and elevation is made in
order to identify these false peak RSSI readings so to zero in on the true peak alignment
reading due to the main antenna beam.
Figure 2.17 – Final Line-of-Sight Adjustment and Signal Optimization
Rotate for azimuth
alignment
Azimuth adjustment bolts
Rotate for elevation
alignment
Elevation adjustment bolt
Note:
Alignment for each antenna should be alternated at least twice before confirming the final
setting.
47 Disconnect the hand-held voltmeter and BNC test lead from the RSSI port.
48 Rotate the RSSI port cap about 90 degrees to seal the Link CX-24 case.
49 Recheck the Link CX-24 LEDs. See Figure 1.3 and Table 4.2 for the locations and descriptions of the
Link CX-24 LEDs.
• When power is properly applied to the Link CX-24, the PWR/LCL ALARM LED will be on.
• Because the radio link has been established, the RF LINK LED should be on.
• When the DS-3 equipment is or is not transmitting data to the Link CX-24, the DATA LED should
be on or off, respectively.
• When the Ethernet equipment is transmitting data to the Link CX-24, the ENET 1 and/or ENET 2
LEDs should be on or flashing. When the Ethernet equipment is not transmitting data to the Link
CX-24, the ENET 1 and/or ENET 2 LEDs should be off.
If any of these conditions is not true, troubleshoot the associated equipment and cables.
Version 1.0
Page 36
February 2004
Link CX-24 User’s Manual
The Link CX-24 is now mounted and aligned. Continue with Section 2.15 for acceptance tests.
2.15
Acceptance Testing
This section describes the tests used to verify that the Link CX-24 data input circuitry, near-end Link CX24 radio, radio link, and far-end Link CX-24 radio are installed properly and operating correctly.
50 Verify that the physical installation is correct. Use Table 2.5 to sign off the individual checks.
Table 2.5 – Physical Installation Checklist
Checklist Item
Is the mounting pipe securely connected to the
mounting structure?
Verified
Inspector
Date
Is the Link CX-24 securely connected to the
mounting pipe?
Is the lightning protection above the Link CX-24
properly grounded?
Is the Link CX-24 properly grounded?
Is the lightning arrestor at the entry to the
equipment enclosure properly grounded?
Is all cabling to the Link CX-24 properly routed
(no sharp bends and properly attached)?
Are all exposed connectors properly sealed
against moisture?
Are all unused connectors capped off or
otherwise sealed against moisture?
Is the antenna polarization correct (as indicated
on the back of the unit)?
51 Verify that the electrical connections are correct. Use Table 2.6 to sign off the individual checks.
Version 1.0
Page 37
February 2004

---

Source Exif Data:

File Type                       : PDF
File Type Extension             : pdf
MIME Type                       : application/pdf
PDF Version                     : 1.4
Linearized                      : No
Modify Date                     : 2004:03:15 11:24:13-05:00
Create Date                     : 2004:03:15 11:23:57-05:00
Title                           : .TABLE OF CONTENTS.
Author                          : Jose Salernitano
Creator                         : Microsoft Word 9.0
Producer                        : Acrobat Distiller 4.05 for Windows
Page Count                      : 44
Mod Date                        : 2004:03:15 11:24:13-05:00
Creation Date                   : 2004:03:15 11:23:57-05:00
Metadata Date                   : 2004:03:15 11:24:13-05:00

EXIF Metadata provided by EXIF.tools