Aviat Networks MDR2400-EHD User Manual

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Document ID	55150
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Document Type	User Manual
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Filesize	295.12kB (3689044 bits)
Date Submitted	1999-08-19 00:00:00
Date Available	2000-01-21 00:00:00
Creation Date	1999-08-17 13:45:58
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liLink System Manual
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User Data
Page 8
862-01545
Multipath Effects
Refer to Figure 4. The uLink digital radio operates at a
frequency onA 61-12. it is likely that it will be
influenced by the effects ofmultipath. Understanding
these effects will help to install the uLink digital radio
link and maximise the reliability ofthe link.
Multipath fade occurs when the receiving antenna receives
not only the direct signal from the u-ansmitting 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
ofthe direct path, thus degrading the link,
Multipath is dependent on transmit frequency and the
specific geometry ofthe 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 ofthe antennas ( a change of0.5m is
typical, but this depends on the geometry ofthe link).
mm ou E
Manama) ’
men as Path
Reflection Path
User Data
Figure 4. Muitipath Effects.
issue 1
862-01545
Installation
Information
issue 1
pLink System Manual
General Information
This section contains only general information and
installation guidelines for the uLinki Specific
installation instructions for the indoor Unit (IU),
Outdoor Unit (OU), Antenna and Interconnection
Cable are provided in Chapter 2 ofthis 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 ofthe OU
without the need to realign the antenna.
Page 9
uiluk System Manual
Operational
Capabilities
Page 10
862—01545
(T
The user can View equipment status and configuration \
data ofall MDR equipment attached in a multiple hop
link front the [U to which the Craft Terminal is attached.
The uLink has the following capabilities:
Upload Indoor Unit Software. Allows you to transfer
a file of executable code from the Craft Terminal to the
lU Microprocessor non-volatile memory.
View Equipment Datar 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 R
Control Equipment. Allows you to configure and/or Q /
set system parameters such as; channel selection, RF
power level, transmitter on/oft’, data options, plant
alarm options, etc.
Built-in Testing. Performs the following built-in tests:
o Starbup BIT (SBlT)
- Continuous BIT (CBIT)
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,
Issue 1
/ .
862-01545
Maintenance
Features
Built-In Test
Features
Issue 1
uLink System Manual
F“
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.
0. 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.
lU alarm display allows for simple fault diagnostics.
lU common to all OUs.
All panels and covers can be removed with one tool.
No special external test equipment is required to
maintain the system.
OU can be replaced without having to re-align the
antenna,
P‘VF‘T'WD
The uLink has the following built—in test features:
0 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) - future
upgrade.
' CRC~4 error detection on user data.
Loss of Data Input Detection.
Loss of Frame Detection on Radio Frames.
Automatic AlS Insertion.
Input Data Loopback.
Output Data Loopback,
- Payload data Output Enable/Disable function.
. Real Time Clock for time-stamping of alarm and
other events (YZK compatible).
c..-
Page i l
iiLink System Manual 862-01545
System The uLink has the following specifications:
Specifications
Performance Link Range:
Characteristics Low Power. Up to 10 km. Provides a link margin of
18 dB based on a 10E‘S BER for an El link.
High Powerl Up to 30km, Provides a link margin of
22 dB based on a 10E“ BER for an El link.
High Power Duplexer option. Up to 40 km using a
22 dBi antenna, Provides a link margin of 22 dB based
on a 1013" BER for an E1 link.
System Start-up Time. Less than ten (10) seconds (at
25 "C). If ambient temperature is < ~15 “C, it takes
10 mins. before system operates to full specification,
Data
Transmission Description Characteristics
Characteristics
a, Frequency Band 2.400 GHz to 2.4835 61—12
h. Go/Retum spacing 42 MHZ (51,'r1)
0. Data Rate Options 2048, 1544 (T1) kbit/sr
d. Interface Standards [TU-T 6.703, 0.704, G,706,
6.823
e. Jitter and Wander [TU—T (3.823
f. Modulation QPSK
g. Error Detection CRC—4
Code
h. Background BER < 10“ ('
an
Page 12 Issue 1
862-01545 uLink System Manual
5 ' Transmitter
Characteristic Description Characteristic
a. Carrier Frequency Band 2400 to 2.442 Gi-iz (LB)
2.442 to 2.4835 GHZ (HB)
b, Modulation B/width (max) 22 MHZ
c. Link Data Rate (max) 2142 kbit/s
d. Tx Power, max. oper. +2 dBm (Low Power)
+24 dBm (High Power)
+30 dBm (Duplexer)
e. TX Power, min. cper. +12 dBm (HP + DU)
+2 dBm (Low Power)
r. Frequency Stability £me
g. Tuning method Microprocessor-
C controlled PLLs
” h. Transmitter disable under soflware control
i. 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 (kbiUs)
2048
BER=10'“ (dBm)
~90
b. Spurious Response Rejection complies with ETS
300-328
c. Spurious Emissions-see Tranrmiz/er Characierir/ics
( d. Equipment Background BER< 10'” (Receive level
‘ between 9 and 34 (18 above threshold).
Issue 1
Page 13
nLink System Manual 862-01545
Wayside Service Description
Channel
f}
0 One (1) wayside service channel of 125-232 serial
data up to a baud rate of 19200 is provided.
a 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.
A uxiliary/Alarm
Interfaces
Description
a, Two (2) inputs (for sensing contact closure or
opening) are provided to sense sitc alarm inputs.
The states ofthesc alarm inputs are shown on
connected management equipment, eg, uLink
Management Information System, as well as from
the IU From Panel Site Alarm LED.
b. Two (2) relays are used to indicate alarm /
auxiliary outputs Each relay has normally open
(N.O.) Common (C) and normally closed (N.C.)
Contact outputs. Output states are software
controlled. The outputs are used to indicate alarm
or other states selected by the operator.
Page 14 Issue 1
C,
86201545 uLink System Manual
Power Supply
Characteristics Description
21.5 to 56 VDC
100 to 240 VAC
<20 W
(1. Selection ofa 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.
a. Input supply voltage (DC)
in. Input Supply voltage (AC)
c, Power Consumption
e, Reverse voltage protection for equipment and
supply (DC option only).
‘—~——»—————
Controls and
Displays Description
a. The pLink IU has a nine 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 I Page 15
ul.ink System Manual 862-01545
Antenna
Characteristics Description Characteristic
a. Size 550mm x 550 mm x 25 mm flat
panel sealed construction
b. Frequency 2.400 GHz to 24835 GHz
0. Gain TX 18 dBi i 0.2 dB
d. Gain Rx 18 dBii 0.4 dB
er Connection non-ohmic coupling to the OU
f. VSWR < 1.5 : 1
gr isolation Tx/Rx > 40 dB
h. Polarisation Tx/ Rx Orthogonal
Page 16 Issue 1
862~01545
Equipment
Status
Monitoring
Issue 1
uLink System Manual
Description
. Indoor Unit Status. The IU logs the state ofthe
baseband signals in the Management Information
Base (MIB) and informs the State and Mode
Control function of any problems or failures.
. Outdoor Unit Status. The OU transmits a periodic
status message to the [U containing the status ofthe
OU. The Fault and Status Manager in the [U
monitors this, updates the MIB and informs its
State and Mode Control function of any problems.
, 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 ifthe transmitting IU is functioning
normally then updates its MIB and informs its State
and Mode Control function of any problems.
. Health Monitoring. A background process
continuously checks the health of the system
hardware and sofiware and reports any anomalies
to the Management Information Base (MIB) of the
appropriate IU. The Fault Manager responds to this
information.
Page I7
pLink System Manual
Mechanical
Characteristics
Environmental
Characteristics
Page 1 8
Description
862—01
Vi
s.
u.
Characteristic
a. Mass
OU (no antenna) < 4 kg
1U < 6 kg,
b. lU Racking 19” DIN 41494, 1U
Standard
c. OU Mounting PoIe mount brackets.
Standard 50 to 102 mm pole diameter.
Description Characteristic
3. Temp. Range
- Indoor Unit
- Outdoor Unit
17. Humidity
0 IndoorUnit
- Outdoor Unit
c. Wind Speed (Outdoor
Equipment)
d. Operating
Atmospheric Pressure
e, Lightning Protection
0 to +50°C (operating)
40 to +7o°c (survival)
-20 to +70°C (operating)
-40 to +70°C (survival)
5 to >90% (weather
protected locations)
8 to 100% (all weather)
up to 150 km/h
(functional)
70 to 106 kPa
1TU~T K.20 for:
PSU, Payload Data and
Interconnection Cable
Issue 1
862—01545 uLink System ManuaI
Frequency Refer to Figure 5. The uLink Digital Radio operates in
Band Plan the 214 GHzto 2.4835 GHz ISM frequency band. The
uLink has predefined channels allocated within this
band (Channels A and B). The channel spacing
between transmit and receive frequencies is 42 MHz.
This is basec on the bandwidth occupied by the spread
spectrum signal and is used to maximise link
performance.
LOW BAND TRANSMIT HlGH BAND TRANSMIT
A B A B
2412 2430 2454 2472
Fre uenc MHz
The recommended irequency pairs for the channel plan are .
A : 2412 a 2454 MHz
13:21:30 & 2472 MHz
Figure 5. Frequency Band Plan.
Issue 1 Page 19
862-01545 “Link System Manual
0 Chapter 2: Installation
Introduction to Chapter 2 provides me installation personnel with the
Chapter 2 information required to assemble, install and
ccmmission the uLink System.
Site Before installing the uLink, ensure that the installation
Requirements site meets the following requirements:
0 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 i Page 2l
qunk System Manual
862-01545
Parts and
Accessories
Supplied for
installation
The following pans and accessories are supplied by
Tellumat for the installation ofthe pLink System.
Note that this list relates to the parts supplied fora
system at a DRS, le. one end ofa DRL.
Description Qty Remarks
Antenna 1 The antenna is shipped with a
complete installation kit
including mounting hardware.
Outdoor Unit 1 Ensure OU is compatible with
(OU) the antenna provided.
indoor Unit 1
(IU)
Data Interface 1 E] or T1.
Card
Interconnection l 10 m, 20 m, 50 m or 75 m in
Cable length as ordered. Used to
connect the IU to the OU,
mfi—fi
Page 22
Issue 1
/"\
xx
862-01545
Customer
Furnished
Tools and
Equipment
lssue l
uLink System Manual
The following table lists all tools and equipment
required to install the uLink System. Note that these
items must be supplied by the customer.
Description Qty Remarks
13 mm Spanner 1 Used to secure the Antenna
to the Pole.
8 mm Spanner 1 Used to secure the Antenna
Mounting Bracket to the
Antenna.
Large Flat l As above.
Screwdriver
Earth Cable or 1 For earthing the IU. Braided
Strap with tube, copper tinned. Gauge 4
5 mm earth lug 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 1 Standard 3-pin rec AC plug.
Cable For AC supply connection to
the rear panel ofthe IU.
OR OR
DC Supply 1 Minimum 2.5 mm square
Cable conductor, rated for 10 A,
For connection between the
power supply and the IU DC
connector on the rear panel.
Binoculars 1 Used for locating the far end
(optional) site. This will assist in the
antenna alignment operation.
Page 23

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