Aviat Networks MDR2400-THC Spread Spectrum Assembly T1 Antenna System User Manual MDR2400 User s Manual

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µLink System Manual
862-01545
µLink Digital Radio
System Manual
Publication Number: 862-01545
Issue 1b
February 1999
Tellumat (Pty) Limited
Reg. No. 96/000957/07
64/74 White Road, Retreat, 7945
P.O. Box 30451, Tokai, 7966
Telephone: +27 21 710-2911
Fax No. +27 21 710-2333
Issue 1b
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µLink System Manual
862-01545
Federal Communications Commission Notice
NOTE
The equipment has been tested and found to comply with the limits for a Class A
digital devices, 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.
The manufacturer is not responsible for any radio or TV interference caused by
unauthorised modifications to this equipment. Such modifications could void the
user's authority to operate the equipment.
This device complies with Part 15 of the FCC Rules. Operation is subject to the
following two conditions: (1) this device may not cause interference, and (2) this
device must accept any interference, including interference that may cause undesired
operation of the device.
This equipment must be professionally installed.
PER FCC rules 15.247 (b)(4)
WARNING! ALL PERSONNEL SHOULD STAY AT
LEAST 1 METER (3.5') FROM THE ANTENNA TO
AVOID EXPOSURE TO POSSIBLE MICROWAVE
ENERGY.
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Document Issue Status
When an issue status of this manual changes, the record below must be
completed and initialled.
Page
No.
1 - 78
1 - 82
Issue 1b
Issue
Status
1b
Authority
(ECN No.)
Page
No.
Issue
Status
Authority
(ECN No.)
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Table of Contents
Page
Chapter 1: Purpose and Planning ............................................................1
Introduction to Chapter 1....................................................................1
µLink Product Family.........................................................................1
Role and Purpose ................................................................................1
System Description ......................................................................................2
System Overview ................................................................................2
Features..............................................................................................2
System Configuration Options ............................................................5
Interface Definitions ...........................................................................6
Planning Information..........................................................................7
Site Evaluation...............................................................................7
Multipath Effects ...........................................................................8
Installation Information ......................................................................9
General Information.......................................................................9
Indoor Unit ....................................................................................9
Outdoor Unit and Antenna .............................................................9
Operational Capabilities ...................................................................10
Maintenance Features .......................................................................11
Built-in Test Features...................................................................11
System Specifications .......................................................................12
Performance Characteristics.........................................................12
Data Transmission Characteristics ...............................................12
Transmitter Characteristics ..........................................................13
Receiver Characteristics ...............................................................13
Wayside Service Channel.............................................................14
Auxiliary/Alarm Interfaces...........................................................14
Power Supply Characteristics .......................................................15
Controls and Displays ..................................................................15
Antenna Characteristics (µLink -T)..............................................16
Equipment Status Monitoring ......................................................17
Mechanical Characteristics ..........................................................18
Environmental Characteristics .....................................................18
Frequency Band Plan........................................................................19
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µLink System Manual
Chapter 2: Installation ........................................................................... 21
Introduction to Chapter 2 ................................................................. 21
Site Requirements ............................................................................ 21
Parts and Accessories Supplied for Installation................................. 22
Customer Furnished Tools and Equipment....................................... 23
Installation Overview ....................................................................... 24
Antenna Installation .................................................................... 24
Outdoor Unit Installation............................................................. 26
Indoor Unit Installation ............................................................... 29
Interconnection Cable Installation ............................................... 31
System Commissioning .................................................................... 33
Information Required ....................................................................... 33
Commissioning Procedure................................................................ 33
Setting-up Procedure ................................................................... 33
Beaming-up................................................................................. 33
Set Critical Parameters ................................................................ 33
Link Error Performance Test............................................................ 34
Appendix A to Chapter 2: ......................................................................... 35
µLink External Connector Pin Details .................................................. 35
Indoor Unit Connector Pin Details ................................................... 35
Outdoor Unit Connector Pin Details................................................. 38
Chapter 3: Operational Information ..................................................... 39
Introduction to Chapter 3 ................................................................. 39
Indoor Unit (IU) Controls, Indicators and Connectors ...................... 39
Front Panel.................................................................................. 39
Indoor Unit (IU) Controls, Indicators and Connectors ...................... 43
Rear Panel ................................................................................... 43
Chapter 4: µ Link Management System ................................................ 45
General Information......................................................................... 45
Hardware (supplied by Customer) .................................................... 45
Software and Hardware (supplied by Tellumat) ................................ 46
Setting-up ........................................................................................ 46
Accessing the Software Program ...................................................... 47
Menu Structure ................................................................................ 47
Main Screen ................................................................................ 48
Short-cut Buttons Area ................................................................ 49
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Station Control Screen......................................................................51
Indoor Unit: Configuration...........................................................52
Indoor Unit: Build State ...............................................................53
Indoor Unit: Status.......................................................................54
Outdoor Unit: Configuration ........................................................58
Outdoor Unit: Build State............................................................60
Outdoor Unit: Status ...................................................................61
Chapter 5: Maintenance Information ....................................................63
Introduction to Chapter 5..................................................................63
Fault Diagnosis.................................................................................63
Chapter 6: Functional Description .........................................................65
Introduction to Chapter 6..................................................................65
µLink System Description.................................................................65
Indoor Unit ..................................................................................66
Chapter 7: Parts List ..............................................................................67
Introduction to Chapter 7..................................................................67
Parts Lists.........................................................................................67
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List of Illustrations
Figure
Page
Figure 1. µLink Indoor Unit. ...................................................................... 3
Figure 2. µLink Outdoor Unit and Antenna................................................ 3
Figure 3. System Overview Block Diagram. ............................................... 4
Figure 4. Multipath Effects......................................................................... 8
Figure 5. Frequency Band Plan................................................................. 19
Figure 6. µLink Antenna.......................................................................... 25
Figure 7. µLink Outdoor Unit................................................................... 26
Figure 8. Indoor Unit Rear Panel.............................................................. 30
Figure 9. Outdoor Unit Mounted on Antenna. .......................................... 32
Figure 10. IU Front Panel Controls, Indicators and Connectors. ............... 40
Figure 11. IU Rear Panel Controls, Indicators and Connectors. ................ 43
Figure 12. µLink Management Software: Typical Main Screen. .............. 48
Figure 13. Typical Station Control Screen. ............................................... 50
Figure 14. Indoor Unit: Typical Configuration Screen. ............................ 52
Figure 15. Indoor Unit: Typical Build State Screen. ................................ 53
Figure 16. Indoor Unit: Typical Status Screen. ........................................ 54
Figure 17. Indoor Unit: Typical Failure Alarm Details Screen................. 55
Figure 18. Indoor Unit: Typical Site Alarms and Control Screen............. 56
Figure 19. Indoor Unit: Typical Service Alarm Details Screen................. 57
Figure 20. Outdoor Unit: Typical Configuration Screen........................... 58
Figure 21. Outdoor Unit: Typical Build State Screen. .............................. 60
Figure 22. Outdoor Unit: Typical Status Screen....................................... 61
Figure 23. µLink System. ......................................................................... 68
List of Tables
Table
Page
Table 1.
Table 2.
Table 3.
Table 4.
Table 5.
Table 6.
Table 7.
Table 8.
µLink System Data Interface Variants .......................................... 5
µLink System RF Configurations.................................................. 5
µLink System: User Services ....................................................... 6
Link Error Performance Check List ............................................ 34
IU Front Panel: Controls, Indicators and Connectors ................. 41
Status LEDs:............................................................................... 42
IU Rear Panel: Controls, Indicators and Connectors................... 44
µLink System Level Parts List .................................................... 69
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Note to Reader
1.
Users must be familiar with the Windows 95 operating
environment.
© 1999 Tellumat (Pty) Limited
The information contained herein is the property of Tellumat (Pty) Limited and is
supplied without liability for errors or omissions. No part may be reproduced, used
or disclosed except as authorised by contract or other written permission. The
copyright and the foregoing restriction on reproduction, use and disclosure extend to
all media in which this information may be embodied, including magnetic or
electronic storage etc.
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List of Abbreviations
AC
Alternate Current
AIS
All Ones (“1’s”) (detected)
BER
Bit Error Rate
BPSK
Binary encoded Phase Shift Keying
CBIT
Continuous Built in Test
CRC
Cyclic Redundancy Check
DC
Direct Current
DCE
Data Communications Equipment
DRL
Digital Radio Link
DRS
Digital Radio Station
DTE
Data Terminal Equipment
FPGA
Field Programmable Gate Array
IBIT
Initiated Built in Test
IU
Indoor Unit
LAN
Local Area Network
LED
Light Emitting Diode
LRU
Line Replaceable Unit
MDR
Microwave Digital Radio
MIB
Management Information Base
MMIC
Monolithic Microwave Integrated Circuit
MTBF
Mean Time Between Failure
MTTR
Mean Time To Repair
N.C
Normally Closed
N.O
Normally Open
NMS
Network Management System
OU
Outdoor Unit
PC
Personal Computer
PCB
Printed Circuit Board
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µLink System Manual
PLL
Phase Locked Loop
QPSK
Quadrature Phase Shift Keying
RAM
Random Access Memory
RF
Radio Frequency
SBIT
Start-up Built in Test
SDC
Serial Data Channel
SNMP
Simple Network Management Protocol
SRD
System Requirements Definition
SRU
Shop Replaceable Unit
TMN
Transmission Management Network
TTL
Transistor-Transistor Logic
VSWR
Voltage Standing Wave Ratio
WAN
Wide Area Network
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µLink System Manual
Chapter 1: Purpose and Planning
Introduction to
Chapter 1
Chapter 1 is aimed at management and planning staff
to enable them to assess the suitability and logistic
requirements of the µLink Digital Radio, hereafter
referred to as the µLink.
µ Link Product
The µLink design philosophy was to produce a range
of products, with the data rate dependent purely on the
Indoor Unit (IU) and the frequency band dependent
purely on the Outdoor Unit (OU). Thus resulting in a
common IU that can operate with different frequency
OUs, or alternatively, an OU that remains unchanged
while the data rate is altered or upgraded.
Family
Role and Purpose
Issue 1
The µLink operates in the 2.4 GHz ISM frequency
band. It provides a full duplex, point-to-point, digital
radio link supporting user data rates up to 2048 kbit/s.
It is used to transport digital data between two or more
sites. Whether the digital information is voice,
telephony, cellular, data or video as required by
various applications, the µLink can be deployed in
urban and rural networks as an interconnect solution.
Typical applications for the system include:
• Telecommunications companies, cellular operators
and private carriers using low cost spread spectrum
E1/T1 links to substitute for conventional copper or
licences band microwave links
• Providing last mile leg in urban areas where
frequency bands are congested
• Rural communications
• Corporate Networks
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System Description
System Overview
A µLink digital radio relay link (DRL) consists of at
least one complementary pair of µLink stations that
may be extended over longer distances by linking
further station pairs in a multiple hop configuration. A
single µLink station comprises an Indoor Unit (Figure
1), an Outdoor Unit and Antenna (Figure 2). The
Indoor Unit (IU) and Outdoor Unit (OU) are
interconnected by a custom cable. Figure 3 is a block
diagram of an µLink DRL.
Features
The µLink offers the following key features:
• T1 and E1 payload data interface options.
• IU is independent of OU frequency band and the
OU is independent of IU data interfaces.
• Network management features, including remote
performance monitoring and configurability are to
be included in future upgrade products.
• The equipment is compact and versatile, enabling
fast deployment.
• The system offers high data link reliability.
• Maintenance requirements are minimal.
• The system provides built-in-diagnostic and test
features.
• Co-locate two (2) antennas on a single mast.
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Figure 1. µ Link Indoor Unit.
Antenna
Outdoor
Unit
Interconnection
Cable
Figure 2. µ Link Outdoor Unit and Antenna.
Issue 1
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µLink System Manual
862-01545
Figure 3. System Overview Block Diagram.
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Table 1 lists the two model variants of the µLink
System, with the input data classification and the radio
link data rate. Table 2 lists the possible RF
configurations with the output power, coupling type,
antenna type and regulations with which the unit
complies.
System
Configuration
Options
Table 1. µ Link System Data Interface Variants
Model Number
Payload Data Type
and Rate
Link Rate
PN Code
Length
µLink - E
E1, 2048 kbit/s
2112 kbit/s
11
µLink - T
T1, 1544 kbit/s
2000 kbit/s
13
Table 2. µ Link System RF Configurations
Option
Output
Power
Coupling
Antenna
Regulations
µLink – LC
+14 dBm
Custom
Non-ohmic
Flat Panel
Tx = 8 dBi
GTSI-300-328
µLink – HC
+14 dBm
+26 dBm
Custom
Non-ohmic
Flat Panel
Tx = 18 dBi
FCC-15.247
µLink – D
+10 dBm +30 dBm
N-type
Female
Customer
Supplied
FCC-15.247/None
Issue 1
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µLink System Manual
Interface
Definitions
862-01545
The µLink System has the following user services: (see
Table 3).
Table 3. µ Link System: User Services
Payload Data Interfaces
E1 Data Interface
120Ω RJ-45/75Ω BNC (factory set). Bipolar AMI
or HDB3 selectable.
T1 Data Interface
100Ω/75Ω (factory selectable), RJ-45 or BNC
Connector. Bipolar AMI or B8ZS selectable.
Wayside Serial Data Channel
Provided for user data. Supports asynchronous full duplex serial data
transfer (with hardware control). 300 to 19200 baud (software selectable).
Auxiliary / Alarm Inputs and Outputs
Inputs
Two (2) Switch Closure Sense inputs are
provided.
Outputs
Two (2) isolated relay contact outputs are
provided. These are presented to the customer as
three output, namely Common, NO and NC.
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Planning
Information
Issue 1
Site Evaluation
When planning a site for a digital radio relay link, it is
of the utmost importance that you take the operational
environment of the proposed site into account.
The combined effect of atmospheric environmental
factors such as rain and lightning, atmospheric
attenuation, signal path obstruction, propagation
fading, air temperature gradients, ice build-up, wind
and solar radiation can contribute towards reducing
the level of performance of the system (as measured in
terms of its capability to transfer data without error).
In the higher frequency bands, rainfall is the main
attenuation mechanism which limits error
performance. Ice and snow will obviously have a
similar effect. Severely cold, and excessively warm
climatic conditions outside the scope of the operating
temperature range can affect the function of the
system, especially the outdoor equipment (see
Environmental Characteristics on page 18 of this
manual).
Also, if masts are not sufficiently rigid, very strong
winds can affect the antenna beam alignment and
outdoor equipment reliability due to wind force buildup and/or vibration in the mast mounted equipment.
Non-atmospheric environmental factors such as the
electromagnetic interference due to the presence of
other antennas, path clutter and terrain topography
can also have a detrimental effect on system
performance and should be carefully assessed before
and during installation.
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Multipath Effects
Refer to Figure 4. The µLink digital radio operates at a
frequency of 2.4 GHz. It is likely that it will be
influenced by the effects of multipath. Understanding
these effects will help to install the µLink digital radio
link and maximise the reliability of the link.
Multipath fade occurs when the receiving antenna
receives not only the direct signal from the transmitting
antenna but also a signal from the transmitting antenna
that has reflected off the ground or nearby obstacles.
The reflected signal takes a longer path to reach the
receiver and acts as an interferer since it is not in phase
with the direct signal. The amplitude of this interferer
can be almost equal to that of the direct path, thus
degrading the link.
Multipath is dependent on transmit frequency and the
specific geometry of the link such as antenna heights,
distance between the antennas and the local terrain. To
counteract multipath, the installer can change the
frequency at which the link operates (a change by 1
channel should be sufficient) or slightly adjust the height
of one or both of the antennas ( a change of 0.5m is
typical, but this depends on the geometry of the link).
Direct RF Path
MDR2400 OU
MDR2400 OU
Reflection Path
MDR2400 IU
MDR2400 IU
User Data
User Data
Figure 4. Multipath Effects.
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Installation
Information
General Information
This section contains only general information and
installation guidelines for the µLink. Specific
installation instructions for the Indoor Unit (IU),
Outdoor Unit (OU), Antenna and Interconnection
Cable are provided in Chapter 2 of this manual.
Indoor Unit
The IU is designed for mounting in the DIN 41494
(19") racking standard. It is 1U in height, 390 mm in
depth and has a mass of < 6 kg. Optional table-top
mounting is possible by fitting rubber feet.
The IUs main data, wayside data, power and alarm
interfaces are located on the rear panel, suitable for
rack installations. For commissioning and testing, the
Monitor connector (used for the Craft Terminal) is
located on the IU front panel.
Outdoor Unit and Antenna
The OU is fastened to the antenna. The OU / Antenna
combination is then mounted to a pole (50 mm to 102
mm in diameter) using mounting brackets. Once
installed, this allows for replacement of the OU
without the need to realign the antenna.
Issue 1
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Operational
Capabilities
862-01545
The user can view equipment status and configuration
data of all MDR equipment attached in a multiple hop
link from the IU to which the Craft Terminal is
attached. The µLink has the following capabilities:
Upload Indoor Unit Software. Allows you to transfer
a file of executable code from the Craft Terminal to
the IU Microprocessor non-volatile memory.
View Equipment Data. Allows you to view the
following:
• Equipment Status
• Alarms and Alarm History
• Equipment Configuration and Settings
• Data Transmission Performance Characteristics
• Data Channel Options
• Equipment Date and Time
Control Equipment. Allows you to configure and/or
set system parameters such as; channel selection, RF
power level, transmitter on/off, data options, plant
alarm options, etc.
Built-in Testing. Performs the following built-in
tests:
• Start-up BIT (SBIT)
• Continuous BIT (CBIT)
• Initiated BIT (IBIT) - user initiated
Real Time Clock Interface. Used to time stamp the
command and error log with the current time.
History Logging. Logs all CBIT, SBIT commands
and responses issued and received by the Indoor Unit.
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µLink System Manual
Maintenance
Features
a. No routine maintenance required.
b. Mean time to repair after arrival on site is less than
30 minutes, provided that the units to be repaired
are reasonably accessible.
c. Extensive self-diagnostics with software-based fault
localisation.
d. Craft Terminal diagnostics, control and
management functions are able to access any local
or remote station equipment linked by radio.
e. IU alarm display allows for simple fault diagnostics.
f. IU common to all OUs.
g. All panels and covers can be removed with one tool.
h. No special external test equipment is required to
maintain the system.
i. OU can be replaced without having to re-align the
antenna.
Built-in Test
Features
The µLink has the following built-in test features:
• LED alarm and status indicators on IU Front Panel.
• Remote unit alarms indicated similar to the local
unit’s alarms.
• Historic alarm logging (last 1000 events).
• CRC-4 error detection on user data.
• Loss of Data Input Detection.
• Loss of Frame Detection on Radio Frames.
• Automatic AIS Insertion.
• Input Data Loopback.
• Output Data Loopback.
• Payload data Output Enable/Disable function.
• Real Time Clock for time-stamping of alarm and
other events (Y2K compatible).
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System
Specifications
The µLink has the following specifications:
Performance
Characteristics
Link Range:
Low power Coupler type. Up to 10 km. Provides a link
margin of 18 dB based on a 10E-5 BER for an E1 link.
High Power Coupler type. Up to 30km using a
18 dBi Tx/Rx antenna. Provides a link margin of
22 dB based on a 10E-5 BER for an E1 link.
High Power Diplexer type. Up to 40 km using a
22 dBi antenna. Provides a link margin of 22 dB
based on a 10E-5 BER for an E1 link.
System Start-up Time. Less than ten (10) seconds (at
25 ºC). If ambient temperature is < -15 ºC, it takes
10 mins. before system operates to full specification.
Data Transmission
Characteristics
Page 12
Description
Characteristics
a. Frequency Band
2.400 GHz to 2.4835 GHz
b. Go/Return spacing
42 MHz (E1, T1)
c. Data Rate Options
2048, 1544 (T1) kbit/s.
d. Interface
Standards
ITU-T G.703, G.704,
G.706, G.823
e. Jitter and Wander
ITU-T G.823
f. Modulation
QPSK
g. Error Detection
Code
CRC-4
h. Background BER
< 10-11
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Transmitter
Characteristics
Description
a. Carrier Frequency Band
Characteristic
2.400 to 2.442 GHz (LB)
2.442 to 2.4835 GHz (HB)
b. Modulation B/width (max)
23.5 MHz
c. Link Data Rate (max)
2142 kbit/s
d. Tx Power, max. oper.
+12 dBm (Low Power)
+24 dBm (High Power)
+30 dBm (Diplexer)
e. Tx Power, min. oper.
+10 dBm (All options)
f. Frequency Stability
±7ppm
g. Tuning method
Microprocessorcontrolled PLLs
h. Transmitter disable under software control
i. Modulation disable under software control
j. Spurious Emissions comply fully with FCC 15.247,
FCC 15.201 and ETSI 300-328
Receiver
Characteristics
Description
a. Sensitivity measured at radio module input
connector (typical):
Data Rate (kbit/s)
BER=10-6 (dBm)
2048
-90
b. Spurious Response Rejection complies with ETS
300-328
c. Spurious Emissions-see Transmitter
Characteristics
d. Equipment Background BER < 10-11 (Receive level
between 9 and 34 dB above threshold).
Issue 1
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Wayside Service
Channel
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Description
• One (1) wayside service channel of RS-232 serial
data up to a baud rate of 19200 is provided.
• The serial data channel provides simultaneous,
full duplex serial data transfer between stations.
Data rates range from 300 to 19200 baud. The
RS-232 standard is provided, with the following
signals : TxD, RxD and Signal Ground.
• The interface provides a DCE (Data
Communications Equipment) interface mode.
Auxiliary/Alarm
Interfaces
Description
a. Two (2) inputs (for sensing contact closure or
opening) are provided to sense site alarm inputs.
The states of these alarm inputs are accessible
from connected management equipment, as well
as from the IU Front Panel.
b. Two (2) relay contact outputs, normally open
(N.O.) and normally closed (N.C.) contacts, are
provided as alarm / auxiliary outputs. Output
states are software customised and controlled.
The outputs are used to indicate alarm or other
states selected by the operator.
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Power Supply
Characteristics
Description
a. Input supply voltage (DC)
21.5 to 56 VDC
b. Input supply voltage (AC)
100 to 240 VAC
c. Power Consumption
< 20 W
d. Selection of a single DC supply or an AC supply to
the IU. The OU is supplied by an isolated single
DC supply fed from the IU via the interconnecting
cable.
e. Reverse voltage protection for equipment and
supply (DC option only).
Controls and
Displays
Description
a. The µLink IU has an LED alarm and status
display. All control functions are accessed via the
Craft Terminal.
b. The operator can perform all essential control and
management functions of both the near and far end
station equipment in the link using the Craft
Terminal.
Issue 1
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µLink System Manual
Antenna
Characteristics
(µ Link -C)
862-01545
Description
Characteristic
a. Size
550 mm x 550 mm x 25 mm flat
panel sealed construction
b. Frequency
2.400 GHz to 2.4835 GHz
c. Gain Tx
18 dBi ± 0.2 dB
d. Gain Rx
18 dBi ± 0.4 dB
e. Connection
non-ohmic coupling to the OU
f. VSWR
< 1.5 : 1
g. Isolation Tx/Rx
> 40 dB
h. Polarisation
Tx / Rx Orthogonal
The µLink -D type can use antennas from other manufacturers. Refer to the
setup procedures on page 27 to determine the power level settings required
for different antenna gains.
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µLink System Manual
Equipment Status
Monitoring
Description
a. Indoor Unit Status. The IU monitors the state of
the baseband signals in the Information Base and
informs the State and Mode Control function of
any problems or failures.
b. Outdoor Unit Status. The OU transmits a
periodic status message to the IU containing the
status of the OU. The Fault and Status Manager in
the IU monitors this, updates the Information Base
and informs the State and Mode Control function
of any problems.
c. Far-end Radio Station Status. The near end IU
transmits a periodic status message to the remote
IU. The Fault and Status Manager in the remote
IU determines if the transmitting IU is functioning
normally then updates the Information Base and
informs the State and Mode Control function of
any problems.
d. Health Monitoring. A background process
continuously checks the health of the system
hardware and software and reports any anomalies
to the Management Information Base (MIB). The
Fault Manager responds to this information.
Issue 1
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µLink System Manual
Mechanical
Characteristics
Environmental
Characteristics
862-01545
Description
Characteristic
a. Mass
OU (no antenna)
IU
b. IU Racking
Standard
< 4 kg
< 6 kg
19" DIN 41494, 1U
c. OU Mounting
Standard
Pole mount brackets.
50 to 102 mm pole diameter.
Description
Characteristic
a. Temp. Range
• Indoor Unit
0 to +50ºC (operating)
-40 to +70ºC (survival)
• Outdoor Unit
-20 to +70ºC (operating)
-40 to +70ºC (survival)
b. Humidity
Page 18
• Indoor Unit
5 to >90% (weather
protected locations)
• Outdoor Unit
8 to 100% (all weather)
c. Wind Speed (Outdoor
Equipment)
up to 160 km/h
(functional)
d. Operating
Atmospheric Pressure
0.7 to 1.06 kPa
e. Lightning Protection
ITU-T K.20 for:
PSU, Payload Data and
Interconnection Cable
Issue 1b
µLink System Manual
862-01545
Frequency Band
Plan
Refer to Figure 5. The µLink Digital Radio operates
in the 2.4 GHz to 2.4835 GHz ISM frequency band.
The µLink has predefined channels allocated within
this band (Channels A and B). The recommended
channel spacing between transmit and receive
frequencies is 42 MHz. This is based on the
bandwidth occupied by the spread spectrum signal and
is used to maximise link performance.
LOW BAND TRANSMIT
2412
2430
HIGH BAND TRANSMIT
2454
2472
Frequency (MHz)
The recommended frequency pairs for the channel plan are :
A : 2412 & 2454 MHz
B : 2430 & 2472 MHz
Figure 5. Frequency Band Plan.
Issue 1
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Page 20
Issue 1b
µLink System Manual
862-01545
Chapter 2: Installation
Introduction to
Chapter 2
Chapter 2 provides the installation personnel with the
information required to assemble, install and
commission the µLink System.
Site Requirements
Before installing the µLink, ensure that the
installation site meets the following requirements:
• Site characteristics are satisfactory (see Planning
Information on page 7).
• Suitable mast (pole) used for Antenna and Outdoor
Unit (OU) installation is firmly in position. Pole
diameter may be between 50 and 102 mm.
CAUTION
THE POLE AND THE EQUIPMENT ROOM,
WHICH HOUSES THE INDOOR UNIT (IU)
MUST BE EARTHED FOR LIGHTNING
PROTECTION ACCORDING TO STANDARD
LOCAL PRACTICES.
Issue 1
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µLink System Manual
Parts and
Accessories
Supplied for
Installation
862-01545
The following parts and accessories are supplied by
Tellumat for the installation of the µLink System.
Note that this list relates to the parts supplied for a
system at a DRS, ie. one end of a DRL.
Description
Qty
Remarks
Antenna
The antenna is shipped with
a complete installation kit
including O-rings, mounting
brackets, nuts and bolts etc.
Outdoor Unit
(OU)
Ensure OU is compatible
with the antenna provided.
If the customer is using his
own Antenna, the OU will be
delivered pre-mounted on a
pole adaptor plate.
Page 22
Indoor Unit
(IU)
Data Interface
Card
E1 or T1.
Interconnection
Cable
10 m, 20 m, 50 m or 75 m in
length as ordered. Used to
connect the IU to the OU.
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Customer
Furnished Tools
and Equipment
The following table lists all tools and equipment
required to install the µLink System. Note that these
items must be supplied by the customer
Description
Qty
13 mm Spanner
Used to secure the Antenna
to the Pole.
8 mm Spanner
Used to secure the Antenna
Mounting Bracket to the
Antenna.
Large Flat
Screwdriver
As above.
Earth Cable or
Strap with
5 mm earth lug
For earthing the IU. Braided
tube, copper tinned. Gauge 4
mm CSA. 8 x 1 mm thick,
45 A, 24/12/0,16.
Cable Ties
A/R
Used to secure the cable to
the mast at regular intervals.
AC Supply
Cable
Standard 3-pin IEC AC plug.
For AC supply connection to
the rear panel of the IU.
OR
OR
DC Supply
Cable
Minimum 2.5 mm square
conductor, rated for 10 A.
For connection between the
power supply and the IU DC
connector on the rear panel.
Binoculars
Used for locating the far end
site. This will assist in the
antenna alignment operation.
(optional)
Issue 1
Remarks
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µLink System Manual
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Installation
Overview
Installation of the µLink is described under the
following four main headings:
a. Installing the Outdoor Unit (OU) and Integral
Antenna.
b. Installing the Indoor Unit (IU).
c. Installing the IU/OU Interconnection Cable.
d. System Commissioning.
To supplement the installation procedure, the
following appendix is provided at the end of this
chapter:
• Appendix A provides connector pin details for the
external connectors of the IU and OUs.
Antenna
Installation
Follow these general steps to install the Antenna.
Refer to the Antenna Manufacturer’s installation
instructions for specific types of antennas.
Step
1.
2.
3.
Action
Secure the C-shaped mounting bracket to the
Antenna using the two securing screws and
bolts (see Figure 6).
Position the antenna in the required position
on the pole. Note the orientation of the
antenna.
Secure the antenna to the pole by tightening
the mounting bracket securing nuts (two nuts
on either end of the pole clamp).
CAUTION
ENSURE THAT THE POLE IS EARTHED FOR
LIGHTNING PROTECTION ACCORDING TO
STANDARD LOCAL PRACTICES.
Page 24
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Antenna Mounting
Bracket Securing
Holes
Outdoor Unit
Mounting Stand-off
Nuts
Antenna Mounting
Bracket Securing
Holes
Figure 6. µ Link -C Antenna.
Issue 1
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µLink System Manual
Outdoor Unit
Installation
862-01545
Follow these steps to mount the OU onto the Antenna.
See Figure 6 and Figure 7.
Step
1.
2.
3.
Action
Loosen the three OU securing stand-off nuts
located on the Antenna (see Figure 6).
Position the OU on the stand-off nuts through
the three (3) key hole slots on the OU (see
Figure 7).
Tighten the securing stand-off nuts.
Outdoor Unit
Mounting Keyhole
Slots
Figure 7. µ Link Outdoor Unit.
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Outdoor Unit
Power Levels
Follow these steps to set the transmitted power level
on the OU. Refer to table 4 for transmitted power
levels.
Step
1.
2.
Action
Determine the gain of the antenna, AT, to be
installed with the OU.
Calculate the transmitted power, PT, according
to the following formula:
PT = 30dBm – (AT – 6)/3 dBm
3.
4.
5.
6.
Determine the power level to be used in NMS
by consulting table 4.
Install a fixed attenuator between the OU and
the antenna if the power level can not be
sufficiently reduced.
Set the transmitted power level in NMS.
Repeat for both stations.
Example: Determining the transmitted power level.
Step
Action
1.
Install a 24dBi antenna.
2.
Transmitted power level to be used is:
PT = 30 dBm – (24-6)/3 dBm
= 30 dBm – 6 dBm
= 24 dBm
3.
4.
Issue 1
Power level 5 corresponds to 24 dBm
transmitted power (from table 4).
Set the power level to level 5 in NMS.
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µLink System Manual
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Table 4. Transmitted Power Level Setting
NMS Power
Level Setting
Page 28
Transmitted Power (dBm)
20
21
22
23
24
25
26
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Indoor Unit
Installation
Follow these steps to install the IU. See Figure 8.
Step
5.
6.
7.
8.
9.
Issue 1
Action
Install the Data Interface module into the IU
by sliding it in until the male connector on the
module mates firmly with the female connector
inside the IU.
Secure the Data Interface module to the IU
with the two (2) x M4 screws provided.
Slide the IU into the 19" rack and secure to the
rack using four (4) x M3 screws. Note that if
the unit is to be table mounted, first fit the four
(4) x rubber feet to each corner on the base of
the IU.
Earth the IU by connecting the earth cable or
strap between the station earth and the earth
stud on the IU rear panel.
Observing the polarity of the supply, wire up
the supplied power connector cable plug and
connect it to the facility DC supply (21 to
56 V) through a minimum 10 A circuit
breaker. Secure the connector screws to the
unit. Check the supply voltage using the
Multimeter.
OR
Connect the AC power cable from the station
power source to the AC power connector on
the rear panel of the IU.
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862-01545
Step
10.
11.
12.
Outdoor Unit
Cable
Connector
Data Interface
Module
Action
Make-off the 120Ω (E1)/100Ω (T1) - factory
set tributary input and output connections and
connect to the RJ-45 connector on the rear
panel of the IU. Alternatively, connect the
75Ω (factory set) coaxial tributary connections
to the BNC input and output connectors on the
IU rear panel as required. See Appendix A at
the end of this chapter for the pin details of the
relevant tributary connector type. Ensure that
all unused tributaries are disabled.
Connect the 15-pin D-type Auxiliary I/O
Connector (alarm interfaces) on the rear panel
of the IU to the appropriate Krone block or
other distribution rack (for further connection
to appropriate supervisory equipment as
required). See Appendix A at the end of this
chapter for pin details.
Connect the Serial Data interface cable to the
Wayside connector on the IU rear panel.
RJ-45
Connector
BNC
Connectors
DC Power
Connector
Wayside Serial
Traffic Data
Connector
AC 3-pin Power
Connector
Auxiliary I/O
Connector
Earth Stud
Figure 8. Indoor Unit Rear Panel.
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Interconnection
Cable Installation
Follow these steps to install the IU / OU
interconnection cable.
CAUTIONS
DO NOT EXCEED THE RECOMMENDED
BENDING RADIUS OF THE CABLE, IE. 10 cm.
DO NOT OVER TIGHTEN THE CABLE STRAPS
ON THE CABLE AND DO NOT FASTEN THE
ACTUAL STRAP LOCKING MECHANISM OF
THE CABLE STRAP ONTO THE CABLE.
Step
1.
2.
3.
4.
Issue 1
Action
Connect the interconnection cable to the
connector on the base of the Outdoor Unit (see
Figure 9).
Using cable ties or straps, secure the cable to
the pole at regular intervals.
Connect the other end of the interconnection
cable to the Outdoor Unit connector on the IU
rear panel (see Figure 8).
Tighten the Outdoor Unit connector securing
screws on the IU rear panel.
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µLink System Manual
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Outdoor
Unit
IU/OU Cable
Connector
Interconnection
Cable
Figure 9. Outdoor Unit Mounted on Antenna.
Page 32
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System
Commissioning
After completing the physical installation of the
Indoor Unit, Antenna and Outdoor Unit, and the
Interconnection Cable, you need to commission the
System. This procedure describes how to set up the
minimum requirements for successful µLink System
operation.
Information
Required
Before commissioning the system, you should know
the proposed frequency band plan (Tx and Rx) for
each station, and the PN sequence for the link.
Commissioning
Procedure
Setting-up Procedure
Perform the following steps at both stations:
• Locate the far site and point the antenna to the
antenna at the far site, as accurately as possible.
• Switch the IU power ON.
• Install and Access the µLink Management
Software (refer to Chapter 4 of this manual).
• Configure the radio channel as required.
• Configure the Tx and Rx PN sequences.
• Set the Tx power to maximum.
Beaming-up
1. Check the RSSI and BER levels.
2. Align the antenna until the Maximum RSSI and
minimum BER levels are attained.
Set Critical Parameters
1. Reduce the Tx power until an RSSI of between -65
and -70 dBm is obtained. This is important to
avoid interference to co-located systems.
Issue 1
Page 33
µLink System Manual
Link Error
Performance Test
862-01545
Perform a link error performance test as follows:
1.
2.
3.
4.
Run data over the link for a period of 15 hours.
Record the RSSI
Record the BER
Record the LED statuses
Record all results on a check list. See Table 5 for an
example.
Table 5. Link Error Performance Check List
Description
1.
Transmit Frequency/Channel
2.
Final RSSI
3.
Link Test BER
4.
LED Status
Page 34
Setting/Remarks
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Appendix A to Chapter 2:
µLink External Connector Pin Details
Indoor Unit Connector Pin Details
E1 DATA (IU Rear Panel)
8-pin RJ-45 Female Connector
Pin
4, 5, 7, 8
Details
E1 Tx Data (+)
E1 Tx Data (-)
E1 Rx Data (+)
E1 Rx Data (-)
Not Used
Pin
4, 5, 7, 8
Details
T1 Tx Data (+)
T1 Tx Data (-)
T1 Rx Data (+)
T1 Rx Data (-)
Not Used
T1 DATA (IU Rear Panel)
8-pin RJ-45 Female Connector
WAYSIDE TERM (IU Rear Panel)
9-pin D-type Female Connector
Issue 1
Pin
1, 4, 6, 7, 8, 9
Details
Tx
Rx
Ground
Not Used
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Indoor Unit Connector Pin Details
MONITOR (IU Front Panel)
9-pin D-type Female Connector
10
15
Page 36
Details
Tx
Rx
Ground
Not Used
AUX I/O (IU Rear Panel)
15-pin High Density D-type Female
Connector
Pin
1, 4, 6, 7, 8, 9
11
Pin
10
11
12
13
14
15
Details
Relay 1 Common
Relay 1 N.O
Relay 1 N.O
Relay 1 N.C
Relay 1 N.C
Relay 1 Common
Relay 2 Common
Relay 2 Common
Relay 2 N.O
Relay 2 N.O
Relay 2 N.C
TTL Input 1
TTL Input 1 Return
TTL Input 2
TTL Input 2 Return
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862-01545
Indoor Unit Connector Pin Details
DC (IU Rear Panel)
2-pin Wieland Polarised 8213 Type
+ DC -
OUTDOOR UNIT (IU Rear Panel)
26-pin High Density D-type Female
Connector
10
18
26
Issue 1
Pin
19
Pin
10
11
12
13
14
15
16
17
18
19
20
21 - 25
Description
Positive
Negative
Details
Tx Data +
Tx Data Tx Data GND
Tx Clk +
Tx Clk Tx Clk GND
Rx Data +
Rx Data Rx Data GND
Rx Clk +
Rx Clk Rx Clk GND
Rx Cntrl +
Rx Cntrl Rx Cntrl GND
Tx Cntrl +
Tx Cntrl Tx Cntrl GND
+Vsupply
+Vsupply
GND
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µLink System Manual
862-01545
Outdoor Unit Connector Pin Details
CABLE CONNECTOR (OU Base)
Page 38
Pin
Details
24V
24V
TXCTXC+
TXDCLKRXDCLK+
TXDCLK+
N/C
RXDCLK+
RXD+
RXCRXDRXC+
TXDTXD+
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
Issue 1b
µLink System Manual
862-01545
Chapter 3: Operational Information
Introduction to
Chapter 3
Chapter 3 provides the user with a description and the
location of all controls, indicators and connectors
located on the front and rear panels of the µLink
Indoor Unit (IU).
Indoor Unit (IU)
Controls,
Indicators and
Connectors
Front Panel
Issue 1
Figure 10 shows all items on the IU Front Panel.
Table 6 describes the items shown in the illustration.
Page 39
µLink System Manual
Near Alarm
LEDs
Status
LEDs
862-01545
Far Alarm
LEDs
Monitor
Connector
Figure 10. IU Front Panel Controls, Indicators and Connectors.
Page 40
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µLink System Manual
862-01545
Table 6. IU Front Panel: Controls, Indicators and Connectors
Item
Description
Near Alarm LEDs
Used to indicate Failure, Service and Site alarms
or status. The LEDs are tri-colour to indicate No
Alarm (Green), Existing Alarm (Red) and
Historic Alarm (Amber) conditions. Refer to
Chapter 5, Maintenance Information for more
details about these alarms.
Far Alarm LEDs
As for Near Alarm LEDs.
Status LEDs
The following status LEDs are located on the IU
Front Panel:
a. Power ON
b. Tx Sync
c. Rx Sync
d. Loss of Signal (LOS)
e. Alarm Indication Signal (AIS)
The Power-ON LED is red. If LED is ON, it
indicates Power-ON if OFF, it indicates Power Off.
LEDs b to e are tri-coloured to indicate No Fault
(Green), Existing Fault (Red) and Historic Fault
(Amber) conditions. Refer to Table 7 for more
information about the Status LEDs.
Monitor Connector
Issue 1
RS-232 standard 9-pin D-type connector for
operation at a nominal 19200 baud. For use with
the Craft Terminal.
Page 41
µLink System Manual
862-01545
Table 7. Status LEDs:
LED
Power On
Tx Sync
Rx Sync
LOS
AIS
Page 42
Status
Remarks
Off
Power Off
Red
Power On
Green
Tx Data Framelock
Red
Loss of Tx Data Framelock
Amber
Historic Tx Sync Framelock Loss
Green
Rx Data Framelock
Red
Loss of Rx Data Framelock
Amber
Historic Rx Sync Framelock Loss
Green
Tx Data Present
Red
No Tx Data Detected
Amber
Historic LOS
Green
AIS Not Present
Red
AIS Present
Amber
Historic AIS
Issue 1b
µLink System Manual
862-01545
Indoor Unit (IU)
Controls,
Indicators and
Connectors
Rear Panel
Figure 11 shows all items on the IU Rear Panel.
Table 8 describes the items shown in the illustration.
Outdoor Unit
Cable
Connector
Data Interface
Module
DC Power
Connector
Wayside Traffic
Serial Data
Connector
On/Off
Switch
AC 3-pin Power
Connector
Auxiliary I/O
Connector
Earth Stud
Figure 11. IU Rear Panel Controls, Indicators and Connectors.
Issue 1
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µLink System Manual
862-01545
Table 8. IU Rear Panel: Controls, Indicators and Connectors
Item
Description
Outdoor Unit Cable
Connector
26-pin, High Density D-type female connector for
IU/OU interconnection cable.
Wayside Traffic
Serial Data
Connector
9-pin D-type female connector. Used for Wayside
traffic channels.
DC Power Connector
Weiland 2-way chassis mounted connector.
Auxiliary I/O
Connector
15-pin, High Density D-type female connector.
Used mainly for diagnostics and maintenance
purposes. Divided into two main sections:
• Plant Alarm Inputs
• Equipment Control Relay Outputs.
On/Off Switch
Power switch to switch the IU On or Off.
AC 3-pin Power
Connector
Chassis mounted IEC AC Inlet. Accepts 100 VAC
to 240 VAC.
Earth Stud
Screw type terminal for earth connection.
Payload Data
Interface Connector
The connector types depend on the type of Data
Interface module installed. Available options are:
E1 (120Ω/75Ω RJ-45/BNC), T1 (100Ω/75Ω RJ45/BNC).
Page 44
Issue 1b
862-01545
µLink System Manual
Chapter 4: µLink Management System
General
Information
The µLink Management Information System is a
software tool for the management (installation,
maintenance and support) of µLink digital radio links.
The software runs on an IBM compatible PC running
Windows 95 (user supplied), connected to the Indoor
Unit (IU) via a serial communications interface.
It provides extensive management functions on site
and, via the microwave radio link, can be used to
access any µLink station within a link domain.
Hardware
(supplied by
Customer)
Issue 1
The hardware may be supplied by the customer. It is
typically a laptop or notebook computer, and must
have the following minimum characteristics:
• IBM PC compatible.
• 486 processor, 25 MHz clock speed.
• 16 Mbyte RAM
• 120 Mbyte hard drive with Windows 95 installed.
• 1.44 Mbyte stiffy drive.
• Mouse or other pointing device.
• 1 x RS-232 serial port (Com port). This is in
addition to the Com port that may be used by the
mouse.
• SVGA monitor (minimum screen resolution of
640 x 480).
Page 45
µLink System Manual
Software and
Hardware
(supplied by
Tellumat)
862-01545
The software is the operator interface to the operation
and control of the µLink System. It allows you to
perform tasks such as; system configuration,
controlling system parameters and accessing on-line
help.
It is supplied by Tellumat on one 1.44 Mbyte, 3.5 inch
stiffy diskette. It is supplied as executable code,
supported with installation and other supplementary
files.
In addition to the software, Tellumat also supplies an
RS232 interconnection cable for use between the IU
and the PC interface. Refer to Appendix A at the end
of Chapter 2 in this manual for pin details of this cable
interface (Monitor connector).
Setting-up
Follow these steps to set up the µLink Management
Information System for use with the µLink:
Step
1.
2.
3.
4.
5.
Page 46
Action
Connect the supplied interface cable between
the RS-232 port on the rear of the computer,
to the Monitor connector on the front panel of
the Indoor Unit.
Switch the computer On.
Run the Windows operating system.
Insert the application Software disk into the
appropriate disk drive (A or B).
In Windows 95, access the Control Panel and
select the Add/Remove Programs. From the
Install/Uninstall folder, select the Install
button.
Issue 1b
µLink System Manual
862-01545
Step
6.
7.
Action
Insert the installation disk of the software into
the relevant drive (A or B) of the PC and then
select Next. Run *\Setup. exe by selecting
Finish
(* being the drive identifier).
Follow the screen prompts to install the
software onto the hard drive of the computer.
Accessing the
Software Program
After installing the software, open the program by
selecting the µLink option from the Program Group in
the Start Menu.
Menu Structure
The µLink Management Information Software is a
menu driven program that provides you with a
graphical interface of the µLink Station or Network.
This interface allows you to select various options to
configure, manage and interrogate the µLink System.
After accessing the software program, the Main Screen
is displayed (see Figure 12).
Issue 1
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µLink System Manual
862-01545
Pull-down
Menus Area
Network Display
Area
Short-cut
Buttons Area
Figure 12. µ Link Management Software: Typical Main Screen.
Main Screen
Page 48
The Main Screen has the following three main
functional areas:
• Pull-down Menus Area (see page 49)
• Short-cut Buttons Area (see page 49)
• Network Display Area (see page 50)
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µLink System Manual
862-01545
Pull-down Menus
Area
The following pull-down menus are available from the
Main Screen:
File.
This menu provides you with an exit option,
which allows you to exit from the µLink
Management Software.
Tools. This menu provides the following options:
• Options. This option allows you to select
the µLink Management Software terminal
serial port. You can select No Port,
COM1, COM2, COM3 or COM4.
• Local IU/Remote IU. These options
allows you to view the details of the
selected site.
Help. This menu provides you with various help
facilities.
Short-cut Buttons
Area
Issue 1
The following short-cut buttons are provided:
Close. Allows you to exit from the µLink
Management Information System.
Options. As for Tools/Options (see Pull-down Menus
Area).
Help. As for Help/About (see Pull-down Menus
Area).
Page 49
µLink System Manual
Network Display
Area
862-01545
The Network Display Area of the Main Screen
provides a graphical display showing all the
microwave links in the domain.
It provides the local and remote site station names and
shows you the site to which the µLink Management
Software is connected.
To view the details of a particular site, simply click on
the required site. The Station Control screen for the
selected site is displayed (see Figure 13).
Figure 13. Typical Station Control Screen.
Page 50
Issue 1b
862-01545
Station Control
Screen
Issue 1
µLink System Manual
See Figure 13. This screen allows you access to the
following parameters:
a. Indoor Unit
• Configuration
• Build State
• Status
b. Outdoor Unit
• Configuration
• Build State
• Status
Also provided on the screen are status indicators for
both the IU and OU. These blocks are bi-coloured and
indicate whether the unit is Online (Green) or Offline
(Red).
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µLink System Manual
Indoor Unit:
Configuration
862-01545
This screen allows you configure the following items
(see Figure 14):
• Wayside Port
• Payload Data Interface Port
• Bit Error Rate Thresholds
To configure the ports, click on the required
parameter(s).
Configure the BER thresholds as required. Payload is
from the user equipment to the IU Payload Data
connector and RF Link is from Antenna to Antenna.
Note that the thresholds must be entered in scientific
notation, eg. 1.0E-6. If the Minor or Major thresholds
are exceeded, it will trigger a Service Alarm fault. If
the Critical threshold is exceeded, it will trigger a Fail
alarm.
When finished, click on the  button. This
transmits the parameters to the selected IU.
Figure 14. Indoor Unit: Typical Configuration Screen.
Page 52
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µLink System Manual
862-01545
Indoor Unit: Build
State
This screen (see Figure 15) allows you to view the
build state details of the primary hardware and
software components of the IU. This information is
read from the IU microprocessor.
Figure 15. Indoor Unit: Typical Build State Screen.
Issue 1
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µLink System Manual
Indoor Unit: Status
862-01545
This screen (see Figure 16) allows you to monitor the
network’s performance. It provides the following data:
• Status of the Near and Far site Fail, Site and
Service alarms.
• Status of the Rx Sync, Tx Sync, LOS and AIS
alarm LEDs.
• Transceiver Error Counts for Code Violation,
CRC4 and FAS.
• Bit Error Rate and Total Blocks of payload data
transmitted.
If you want to clear the LEDs, simply click on the
 button.
If you want to clear the Error Counts, simply click on
the  button.
You can see more details of the Fail, Site and Service
alarms by clicking on the respective highlit button.
This initiates the selected site IU Detailed alarm screens
(see Figure 17, Figure 18 or Figure 19 respectively).
Figure 16. Indoor Unit: Typical Status Screen.
Page 54
Issue 1b
862-01545
Indoor Unit:
Failure Alarm
Details
µLink System Manual
This screen (see Figure 17) provides more detailed
information of the Near and Far site Fail alarms.
The specific cause of the error is shown by a tick in the
adjacent check box of the suspected error.
Refer to Chapter 5 of this manual to fault-find the
failure alarm.
Figure 17. Indoor Unit: Typical Failure Alarm Details Screen.
Issue 1
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µLink System Manual
Indoor Unit: Site
Alarms and
Control
862-01545
This screen (see Figure 18) provides more detailed
information of the selected sites Site alarms. It also
allows you to test alarm relays.
The specific cause(s) of the site alarm is shown by a
tick in the adjacent check box of the alarm.
To trigger (test) a relay, click in the relevant Control
checkbox and the click on the  button. The
selected relay will be triggered.
Figure 18. Indoor Unit: Typical Site Alarms and Control Screen.
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Indoor Unit:
Service Alarms
µLink System Manual
This screen (see Figure 19) provides more detailed
information of the selected site’s Service alarms.
The specific cause(s) of the alarm is shown by a tick in
the adjacent check box of the listed BER warnings.
Refer to Chapter 5 of this manual to fault-find the
Service alarm.
Figure 19. Indoor Unit: Typical Service Alarm Details Screen.
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Outdoor Unit:
Configuration
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This screen allows you configure the following
Default and Current OU parameters (see Figure 20):
Figure 20. Outdoor Unit: Typical Configuration Screen.
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Default and
Current
Parameters
µLink System Manual
The following parameters can be configured for
Default and Current settings:
• Transmit Channel. Channel 0 to 11 (see
Frequency Band Plan on page 19 of this manual).
• Receive Channel. Channel 0 to 11 (see
Frequency Band Plan on page 19 of this manual).
We recommend that transmit and receive channels
be set at least three channels apart.
• Transmit Power. 1 to 10. 1 being the minimum
power level (17 dBm) and 10 being the maximum
power level (26 dBm).
• PN Code. A number between 0 and 999. For
optimal performance this should be “237” (Barker
code for an 11 bit PN sequence).
• Redundancy (A or B). If the hardware
configuration allows (ie. equal gain antennas and
standard power system), the transmit and receive
paths can be swapped. This changes the effective
polarisation’s of the Tx and Rx signals and can be
used to counteract multipath effects. Dual
redundancy can also be used in the event of a RF
transceiver failure.
To configure and program the default parameters, set
the required parameters and then click on the
 button.
To configure and program the current parameters, set
the required parameters and then click on the
 button.
To configure and program the default and current
parameters, set the required parameters and then click
on the  button.
If the parameters sent to the OU are valid, the relevant
Valid check boxes will be ticked.
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Outdoor Unit:
Build State
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This screen allows you to view the following build
state details of the primary hardware and software
components of the OU (see Figure 21). This
information is read from the OU microprocessor.
Figure 21. Outdoor Unit: Typical Build State Screen.
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Outdoor Unit:
Status
µLink System Manual
This screen allows you to view the following OU status
information (see Figure 22):
• Last Restart
• Carrier Detect Present (Y/N)
• Received Signal Strength Indication (RSSI) in
dBm.
• RSSI bar graph
Figure 22. Outdoor Unit: Typical Status Screen.
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µLink System Manual
Chapter 5: Maintenance Information
Introduction to
Chapter 5
Chapter 5 provides the technical personnel with the
information necessary to diagnose and repair (by
replacement) a fault on the µLink System.
Recommissioning information for the µLink is also
provided to ensure that the system is functioning
correctly after repair or replacement of the LRU/SRU.
Fault Diagnosis
To ensure the minimum down-time of the µLink
System, fault diagnosis is divided into two distinct
categories:
• Diagnosing the most likely faulty site (Near or
Far).
• Diagnosing the faulty LRU at the site, ie. Indoor
Unit, Outdoor Unit, Antenna or Interconnection
Cable.
Information to follow
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µLink System Manual
Chapter 6: Functional Description
Introduction to
Chapter 6
Chapter 6 provides a detailed description of the µLink
System as well as a brief description of the Line
Replaceable Units (LRUs) comprising the system.
This chapter is aimed at providing the service
technician with an understanding of the function and
operation of the µLink System.
µ Link System
The µLink System is a Direct Sequence Spread
Spectrum Digital Radio operating in the 2.4 GHz ISM
frequency band. Various payload data interfaces can
be installed, ie. T1 and E1. The µLink system can be
extended to include other frequency bands merely by
using a different microwave transceiver in the Outdoor
Unit (OU). The Indoor Unit (IU) is not dependent on
the frequency band used.
A µLink Radio Relay Station comprises a single IU, an
OU (with integral antenna), interconnected by a custom
cable. On-site management and maintenance is achieved
by using a Craft Terminal that interfaces to the IU.
A radio relay link consists of a complementary pair of
µLink stations. It is possible to extend range by
linking further station pairs in a multiple hop
configuration.
The following options may be added to a µLink
Digital Radio System:
• Local area network for networking of multiple
radio relay stations.
• IP routers, bridges, and gateways for networking to
the Telecommunications Network Management
(TNM) system.
Description
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Indoor Unit
Information to Follow
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Chapter 7: Parts List
Introduction to
Chapter 7
Chapter 7 identifies, lists and describes all system
level user replaceable parts and components
comprising the µLink System. Part numbers for reordering purposes are also provided.
Parts Lists
The columns in the parts lists provide the following
information:
• Item:
Indicates the annotation number
referenced in the associated parts list
illustration in Figure 23.
• Part No.:
Gives the Tellumat part number for
the specific item.
• Description: Provides a brief description of the
item.
• Qty.
States the quantity of the item used
per Indoor Unit.
• Remarks:
Provides any useful supplementary
information.
Figure 23 shows the user replaceable parts and
components at the system level. Table 9 shows the
actual parts list.
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Figure 23. µ Link System.
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Table 9. µ Link System Level Parts List
Item
Part
Number
Description
Qty.
Remarks
651-03531
651-03586
Antenna (18dBi Tx/18dBi Rx
gain)
Outdoor Unit (E1 HB)
See Note 1
651-03587
Outdoor Unit (E1 LB)
See Note 1
651-03592
Outdoor Unit (T1 HB)
See Note 1
651-03593
Outdoor Unit (T1 LB)
See Note 1
651-03584
See Note 1
651-03585
Outdoor Unit (E1 Diplexer
HB)
Outdoor Unit (E1 Diplexer LB)
See Note 1
651-03590
See Note 1
651-03591
Outdoor Unit (T1 Diplexer
HB)
Outdoor Unit (T1 Diplexer LB)
See Note 1
660-03531
660-03150
660-03149
651-03533
Antenna Mounting Bracket Set
IU/OU Interconnection Cable
(10m)
IU/OU Interconnection Cable
(20m)
IU/OU Interconnection Cable
(50m)
IU/OU Interconnection Cable
(75m)
Indoor Unit
651-03594
660-03152
651-03526
E1 Interface Card
See Note 2
651-03527
T1 Interface Card
See Note 2
Note 1: Check that Outdoor Units are ordered as a matched pair and
ensure that they are of a complimentary type, ie. low band (LB)
or high band (HB) types at opposite ends of the link.
Note 2: Only one interface card (E1 OR T1) is installed in the Indoor
Unit.
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