OptiMesh™ Base Station Installation and User Guide

P/N 700-0043-001
OptiMesh™ Base Station
Installation and User
Guide
Revision M-B1
Publication History
Date
Revision
Description
November
2000
M-A1
Initial Release
January
2001
M-B0
Additions and Modifications to Procedures and Diagrams, Additions
to Troubleshooting and Tips
February
2001
M-B1
Modification of Procedure 6-3 (additional steps and screen captures)
OptiMesh is a trademark of AirFiber, Inc.
The following are trademarks or registered trademarks of their respective companies or
organizations:
SPARC, SPARCstation are trademarks of Sun Microsystems, Inc.
HP OpenView is a trademark of Hewlett-Packard Company.
UNIX is a trademark of The Open Group.
Ashtech, Locus, and Geodetic Base Station Software (GBSS) are trademarks of the Magellan
Corporation.
Dell is a trademark of the Dell Computer Corporation.
Intel is a trademark of the Intel Corporation.
All other brand or product names are the trademarks or registered trademarks of their respective
companies or organizations.
Copyright 
 2000 AirFiber, Inc., All Rights Reserved
The information contained in this document is the property of AirFiber, Inc., and is strictly confidential. By receipt of this
manual, the recipient agrees that no part of this publication will be reproduced, stored in a retrieval system, or
transmitted, in any form or by any means-electronic, mechanical, recording, or otherwise-without the prior written
consent of AirFiber, Inc.
The content of this document is subject to change without notice, and should not be construed as a commitment by
AirFiber, Inc. AirFiber, Inc. assumes no responsibility or liability for any errors or inaccuracies that may appear in this
document.
OptiMesh Base Station Installation and User Guide
M-B1
Table of Contents
About this Guide . . . . . . . . . . . . . . . . . . . . . . . . . . .
iii
GPS Base Station Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
iii
Safety Considerations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
iv
Document Conventions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
iv
Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
iv
Customer Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
vi
GPS Base Station Overview. . . . . . . . . . . . . . . . . .
1-1
General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-1
Hardware Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-4
Rooftop Antenna . . . . . . . . . . . . .
GPS Receiver . . . . . . . . . . . . . . . .
Serial Fiber-optic Converter Modem
Environmentally-Hardened Receiver
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Enclosure .
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1-4
1-6
1-8
1-9
Optional Battery Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-11
Windows NT Workstation . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-12
Software Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-12
Geodetic Base Station Software
Locus Processor Software . . . .
Additional Utility Programs . . .
Locus Survey Project Manager .
System Requirements . . . . . . .
(GBSS)
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1-13
1-13
1-13
1-13
1-14
GPS Base Station Parts Listing. . . . . . . . . . . . . . . . . . . . . . . . . .
1-14
OptiMesh Base Station Installation and User Guide
M-B1
ii
Site Preparation . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1
Site Survey Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1
Configuration Options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-2
Indoor Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Outdoor Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-2
2-5
Antenna Mount Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-6
Mount Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-8
Safety Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-8
Lightning Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-9
Site Construction—Indoor Configuration . . . . . . .
3-1
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-1
Tools and Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-2
Coaxial Cable Configuration . . . . . . . . . . .
Coaxial and Fiber-optic Cable Configuration .
Parapet Mount . . . . . . . . . . . . . . . . . . . . .
Tripod Mount . . . . . . . . . . . . . . . . . . . . . .
Coaxial Cable Installation . . . . . . . . . . . . . . .
Fiber-optic Cable Installation Procedures . . . .
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. 3-2
. 3-3
. 3-3
. 3-3
. . 3-4
. 3-8
Site Construction—Outdoor Configuration . . . . . .
4-1
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4-1
Tools and Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4-2
Parapet Mount . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tripod Mount . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fiber-Optic Installation . . . . . . . . . . . . . . . . . . . . . . . . .
Optional Battery Box Installation . . . . . . . . . . . . . . . . .
Environmentally-hardened Receiver Enclosure Installation
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GPS Base Station Software Configuration . . . . . .
Introduction
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. 4-3
. 4-3
. 4-4
. 4-5
. 4-12
5-1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
GBSS Software Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2
Tornado FTP Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6
OptiMesh Base Station Installation and User Guide
M-B1
iii
Cygnus BASH
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7
Auto Windows Logon 5-9
Turn Off Device/Serial Mice Conflict 5-10
Locus Processor Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
RAS–Configuration of the PPP Dial-in through Base Station
5-10
. . . . . 5-11
Obtaining GPS Base Station Reference Data. . . . .
6-1
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-1
Considerations for Establishing Seed Values . . . . . . . . .
Obtaining Seed Values
Reference to Existing Remote Base Station . . . . . . . . . . .
Obtaining Seed Values
No Reference to Existing Remote Base Station . . . . . . . . .
Obtaining Seed Values
No Reference to Existing Remote Base Station (monument)
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6-1
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6-3
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6-6
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6-8
Base Station Operation . . . . . . . . . . . . . . . . . . . . .
7-1
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8-1
Alternating Current Power. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8-1
Checking Fiber-Optic Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8-1
Visual Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8-1
Direct Current Power/Battery . . . . . . . . . . . . . . . . . . . . . . . . . . .
8-1
Battery Specifications
..............................
Maintaining The Battery Box
...........................
8-2
8-3
Removing the Batteries From The Battery Box . . . . . . . . . . . . . . . 8-4
Inserting and Connecting the Batteries . . . . . . . . . . . . . . . . . . . . . 8-5
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . .
Problem Resolution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
OptiMesh Base Station Installation and User Guide
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9-1
M-B1
iv
OptiMesh Base Station Installation and User Guide
M-B1
v
About this Guide
GPS Base Station Overview
This document describes the installation and setup of the OptiMesh™
Global Positioning System (GPS) base station, used to obtain GPS reference data during the site commissioning process. It is written for site
engineering and construction staff or individuals who will be performing
the site installation and commissioning function.
The GPS base station plays a key role in site commissioning the OptiMesh nodes, the process by which the Element Management System
(EMS) software establishes a connection (acquires a link between nodes)
and brings the node online.
The base station is fixed equipment that remains installed throughout
the life of the OptiMesh network, but is only required when commissioning a new node into an OptiMesh network. It is not required during normal operation of either an individual node or the OptiMesh network.
The GPS base station must be installed and reference data obtained
before any other site commissioning procedures can take place. For additional information about the site commissioning process, refer to the
OptiMesh Site Commissioning Guide.
The following diagram depicts the GPS base station in relation to the
Link Acquisition System (LAS):
OptMesh Base Station Installation and User Guide
M-B1
vi
Link
Acquisition
System (LAS)
GPS
Base Station
(GBS)
Link
Acquisition Kit
(LAK)
Link Acquisition
Fixtures
(LAFs)
Link Acquisition
Briefcase
(LAB)
Link Acquisition
Program
(LAP)
Figure i-1
The Link Acquisition System
Safety Considerations
The following safety precautions apply to the use of the GPS base station.
DANGER
If the configuration you are using to install the GPS base
station consists of coaxial cable connecting to the GPS
receiver located inside of the building, in-line lightning
surge protection (provided in the base station installation
kit) must be installed.
Ensure that the surge suppressor is connected to the
building ground.
Document Conventions
The following conventions are used throughout this manual.
Notes
Notes are accompanied by an icon that indicates the type of note.
OptiMesh Base Station Installation and User Guide
M-B1
vii
Informational Note
INFORMATION
The icon shown to the left denotes an informational note relating to the
topic being discussed in that section of the document
Cautionary Note
CAUTION
The icon shown to the left denotes a cautionary note. A
cautionary note provides information that is essential to
preventing damage to the OptiMesh equipment or other
equipment described in the note.
Warning Note
DANGER
The icon shown to the left denotes a warning note. A warning note
provides information that is essential to preventing harm to
individuals who are installing or operating the product.
Tip
TIP
The icon shown to the left identifies a tip or technique that is helpful to
the topic being discussed.
OptiMesh Base Station Installation and User Guide
M-B1
viii
Text Conventions
User Action
In instructions, when you are required to select an option, the option
appears with the first letter of the word capitalized. For example:
From the computer’s desktop, click on the Start button.
Information you are required to enter appears in a different font: courier
new 10, bold. For example:
Type: C:\Ashtech
Information that the system displays appears in courier new 10. For
example:
The system returns the message: Disconnect the tiltmeter.
Customer Support
Contact AirFiber’s Customer Support department at 858.676.7001 or
toll-free at 877.576.7001, or send email to support@airfiber.com. You can
also contact Customer Support through the AirFiber website: www.airfiber.com.
OptiMesh Base Station Installation and User Guide
M-B1
1-1
11-
GPS Base Station Overview
General Description
The GPS base station plays a key role in the site commissioning of the
OptiMesh nodes. Site commissioning is the process by which the Element
Management System (EMS) software establishes a connection (acquires a
link between nodes) and brings the node online. The GPS base station
provides reference GPS data during the site commissioning process,
ensuring centimeter alignment of the wireless optical links (WOLs)
between nodes. Figure 1-1 provides an overview of the site commissioning
process.
Previously
commissioned
premise node
Alternate:
Direct home run
to the switch
ATM
switch
Router
Root node
Newly
installed
node
Infrared
transmit
Infrared
receive
In-band
communication link
Step 1
Link Acquisition Fixture
ADM
Fiber-optic
SONET/SDH
ring
Ethernet
ADM
Base station
antenna
User interface at the
NOC the EMS
Node
connection
box
Base station
receiver/
workstation
Internet
Step 4
Step 3
Laptop PC
Internal corporate
intranet or cell/
satellite phone
connection
Step 2
Cell/satellite
phone
Wireless or
LAN modem
Figure 1-1
The Site Commissioning Process
OptiMesh Base Station Installation and User Guide M-B1
1-2
Table 1-1
Site Commissioning Process Detail Steps
Sequence
Description
Step 1
Under LAP control and using the LAF, measure the node
position (x.y.z, tip, tilt, orientation). Store this
information on the laptop PC.
Step 2
Collect reference position data from the base station and
download to the laptop PC.
Step 3
Laptop PC computes the precise node position
(centimeter accuracy) from data obtained in steps 1 and
2 above.
Step 4
Laptop PC transfers the precise node location to the EMS.
The EMS then: computes the turret pointing vectors,
downloads the pointing vectors to the laptop PC, and
requests that the newly installed node align its turrets to
those of its partner nodes.
The GPS base station is used only for site commissioning; it is not
required for ongoing operation of the OptiMesh network. However,
because the GPS base station provides reference position data for the
nodes in the OptiMesh network, it is installed permanently for future
commissioning of OptiMesh nodes, or to recommission a node if necessary.
If the OptiMesh network is configured so that no one base station can be
located within 12.4 mi (20 km) of each node in the network, additional
GPS base stations are required to provide reference data for the site commissioning process. These additional base stations will use positioning
data from the original base station to determine a reference position. This
methodology ensures that all position measurements in the entire OptiMesh network are in reference to one position—the first base station
installed. Specific instructions on how to collect this data are provided in
Chapter 6, Obtaining GPS Base Station Reference Data.
The GPS base station consists of the following components:
• A rooftop-mounted antenna that can be located up to 12.4 miles (20
km) from the farthest node in the AirFiber OptiMesh network
•
A GPS receiver that processes signals from the GPS satellite
constellation to provide real-time position, velocity, and time
measurements used to generate reference position of the GPS base
station
•
A Windows NT Workstation running the following software packages:
Geodetic Base Station Software (GBSS)
Locus GPS and GPS Base Station Software (LGPS–GBSS)
OptiMesh Base Station Installation and User Guide M-B1
1-3
Various Utility Programs: (Cygnus BASH, PKZIP, Tornado FTP
daemon, TweakUI)
Ashtech Locus Survey Project Manager Software
•
A coaxial cable connecting the antenna to the GPS receiver, and
associated surge protection equipment.
•
An optional customer supplied fiber-optic cable to connect the GPS
receiver to the NT workstation, used when the distance between the
antenna and the GPS receiver is greater than 500 ft (152.4 m), or when
the receiver is located outside on the rooftop.
•
Optional serial fiber converter modem(s) used when a fiber-optic cable
is used to connect the GPS receiver to the NT workstation.
•
An optional environmentally hardened receiver enclosure containing
the GPS receiver and a serial fiber converter modem in the case of an
outdoor configuration.
•
A DB25 to DB9 cable for connecting the GPS receiver to the serial port
of the Windows NT workstation.
The antenna, standing atop one or two four-foot pipes (maximum height
of the pipes is 8 ft [2.4 m]), is mounted on the roof of the building so that
the antenna has an unobstructed view of the sky for satellite tracking. A
wall mount or non-penetrating tripod can be used to anchor the antenna
to the building rooftop.
Next, the antenna is connected to the GPS receiver, which in turn is connected to a Windows NT workstation running the GPS base station software programs designed to collect and process reference data.
Attachment to the NT workstation is accomplished with a standard
RS-232 serial port, and to a standard power outlet for power with a power
transformer.
There are three main configuration choices for connecting the components of the GPS base station assembly.
INFORMATION
The key factors that determine which choice is appropriate for your
installation are the distance from the antenna to the GPS receiver, the
distance from the antenna to the NT workstation and the physical
characteristics of the site.
If the building layout prohibits the location of the GPS receiver within
500 ft (152.4 m) of the antenna, then an outdoor configuration should be
used. Please see Table 1-2, and Configuration Options in Chapter 2 for
additional information about the configurations.
OptiMesh Base Station Installation and User Guide M-B1
1-4
Table 1-2
Configuration Options
Distance Characteristics
Configuration
Distance from antenna to NT
Indoor, coaxial cable option
workstation less than 500 ft (152.4
m)
Distance from the antenna to GPS Indoor, coaxial cable and fiber
receiver less than 500 ft (152.4 m), option
and distance from GPS receiver to
NT workstation greater than
supported by the RS-232 serial
cable
Distance from the antenna to the
GPS receiver greater than 500 ft
(152.4 m) if GPS receiver were to
be housed inside the building
Outdoor, coaxial cable and fiber
option, use of environmentally
hardened box to house GPS
receiver outside.
Hardware Components
Rooftop Antenna
The antenna is mounted on the rooftop and can be located up to 12.43
miles (20 km) from the farthest node in the OptiMesh network. The
antenna must have a clear view of the sky without any obstructions, and
should be located away from potential EMI interference.
There are two different types of mounts available for the antenna:
• Parapet: Antenna is mounted on one or two 4 ft poles, and attached to
the wall with mounting brackets. Figure 1-2 provides an example of
the GPS base station using a parapet mount.
OptiMesh Base Station Installation and User Guide M-B1
1-5
Antenna
Coaxial cable (up to 500 ft/152.4 m)
Mounting
bracket
4-ft (1.22-m) pipes for mounting antenna
In-line lightning surge protection
Roof
GPS
receiver
Serial
G12
GPS
AC-DC
"wall cube"
Computer
Computer
Customer-provided
optional UPS
Figure 1-2
GPS Base Station using a Parapet Mount
•
Non-penetrating Tripod: A 4 ft (1.2 m), 6 ft (1.8 m), or 8 ft (2.4 m) pole
is inserted in the tripod base. The antenna is mounted on a pole, and
attached to the tripod pole by means of two clamps. The tripod is
anchored to the roof by means of concrete cinderblocks. As an
alternative, you may choose to anchor the tripod in a permanent
manner (for example, using bolts) according to your building
conditions and requirements. Figure 1-3 provides an example of the
GPS base station with a non-penetrating tripod mount.
OptiMesh Base Station Installation and User Guide M-B1
1-6
Antenna
Coax
4ft (1.2 m), 6 ft (1.8 m),
or 8 ft (2.4 m) pole
In-line lightning surge
protection
Tripod
stand
Roof
Serial
GPS GPS
receiver
AC-DC
- "wall
cube"
NT
Computer
Workstation
Customer-provided
optional UPS
Figure 1-3
GPS Base Station with Tripod Mount
GPS Receiver
The GPS receiver processes signals from the GPS satellite constellation
to provide real-time position, velocity, and time measurements. It uses
12 dedicated separate and parallel channels for Coarse/Acquisition (C/A)
code-phase (pseudo-range) and carrier-phase measurement on the L1
(1575.4 MHz) band. The GPS receiver receives satellite signals via an
L-band antenna and low-noise amplifier (LNA).
Operation
Within 6 seconds after the first satellite (Space Vehicle or SV) lock, the
GPS receiver time is set. If no ephemeris data are in memory, or if the
data are older than 10 hours, 30 to 60 seconds are needed to collect data.
After three or four SVs are locked and the almanac/ephemeris data is collected, the GPS receiver computes its first position. At the next power up,
OptiMesh Base Station Installation and User Guide M-B1
1-7
if the data has been backed up and is less than 10 hours old, the GPS
receiver uses it to search only visible SVs. Under these conditions, the
GPS receiver recomputes position in 10 to 12 seconds.
The GPS can track all Block I and Block II GPS satellites. All thirty-two
PseudoRandom Noise (PRN) numbers (as specified in Navstar GPS Space
Segment/Navigation User Interfaces, ICD-GPS-200, Revision B) are
coded inside the receiver/processor card. The GPS constellation comprises twenty-four SVs. As it acquires each SV, the GPS receiver notes
the time and collects the ephemeris data about the orbit of that SV, and
almanac data about the orbits of all the SVs in the constellation. To compute three-dimensional position and velocity, the GPS receiver needs to
lock on to at least four SVs. Up to 20 independent measurements are
determined per cycle, with no interpolation or extrapolation from previous solutions.
Light-Emitting Diodes
The GPS receiver has a two-color light-emitting diode (LED); red indicates the power status, and green indicates the number of SVs locked. As
an example, four green flashes indicate four satellites are locked.
On power-up, the status LED lights red and then continues to flash red
indicating that the unit is on and there is no position computed. When
the GPS automatic search results in an SV acquisition, the status LED
flashes green between the red power status flashes. Every SV lock-on
produces a green flash, where a short green flash indicates the satellite is
locked but not being used; a medium-duration green flash means the SV
is locked but ephemeris for that satellite has not yet been collected; and a
long green flash indicates that ephemeris for that satellite is available.
Once the unit is locked to enough satellites to compute a position, the red
flash is longer, indicating it is computing a position. Table 1-2 provides a
quick reference to LED status operations.
OptiMesh Base Station Installation and User Guide M-B1
1-8
Table 1-3
GPS Receiver LED Quick Reference
LED Function Color
(green/red alternate in
the LED)
Satellite Tracking and
Power Status
Red/Short Flash
Unit on, no position computed
yet.
Green/Short Flash
Satellite locked but not being
used.
Green/Medium Flash
Satellite locked, and data is
being collected.
Green/Long Flash
Satellite locked, enough
positioning data has been
collected
Red/Long Flash
Receiver has tracked and
collected enough data from
the satellites, and is
computing a position.
Power Requirements
The GPS receiver requires a direct current input voltage of 5 V dc (regulated ± 5%) and consumes approximately 1.4 W of power.
The GPS receiver is capable of 110 V/60 Hz or 220 V/50 Hz operation. A
power adapter is supplied in the GPS base station kit.
Serial Fiber-optic Converter Modem
The serial fiber-optic converter modem is designed to draw power from
the power jack only and consumes very low power. The input direct current voltage is from 9 V to 14 V and current is @300 mA. The connector is
a terminal block type with polarity indicated on the top cover of the unit.
If the external power adapter need to be replaced, use one with the following specifications: 12 V dc @800 mA.
The modem is capable of 110 V/60 Hz or 220V /50 Hz operation.
OptiMesh Base Station Installation and User Guide M-B1
1-9
Figure 1-4
Serial Fiber-optic Converter Modem
Environmentally-Hardened Receiver Enclosure
The environmentally-hardened receiver enclosure is used to house the
GPS receiver in the event the receiver needs to be located outside on the
rooftop (outdoor configuration).
The enclosure contains the:
• GPS receiver
•
Serial fiber-optic converter modem
•
Alternating current/direct current power supply
•
AirFiber direct current/direct current board
•
Heater
•
Heater controller
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Figure 1-5
Environmentally-hardened Receiver Enclosure
The enclosure is capable of accepting 93 to 132 V ac and 187 to 264 V ac.
The power supply automatically adjusts according to the input voltage
range. The power supply operates over a 47 to 63 Hz power input frequency range, and a –40°C to +70°C temperature range.
The enclosure will draw approximately 50 W with the heater operating
(during low temperature situations) and 5 W without the heater.
Table 1-4
Environmentally-hardened Receiver Enclosure Physical
Characteristics
Characteristic
Comment
Weight
Measurement
27.6 lb (12.519 kg)
Size
Height x width x depth 20 x 15.6 x 8.4 in.
(50.80 x 39.62 x 21.34 cm)
Power
Without heater
15 W
With node heater and
connector box heater
105 W
120 V ac nominal
104 V ac to 127 V ac, 60 +/-3 Hz
240 V ac nominal
208 V ac to 254 V ac, 50 +/- 3 Hz
Primary Input
Voltage
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Optional Battery Box
The battery box can be used as an alternative or backup power source for
the environmentally-hardened outdoor receiver enclosure used in the outdoor configuration.
Table 1-5
Battery Box Physical Characteristics
Characteristic
Weight
Size
Comment
Measurement
Without batteries
33.2 lb (15.060 kg)
With batteries
85.6 lb (38.83 kg)
Height x width x depth 24 x 15.6 x 13 in.
(60.96 x 39.62 x 33.02 cm)
Power
Without heater
1W
With heater
45 W
Table 1-6
Battery Physical Characteristics
Characteristic
Comment
Measurement
Length
7.13 in. (18.11 cm) maximum
Width
3 in. (7.62 cm) maximum
Height
6.59 in. (16.74 cm) maximum
Approximate
Weight
13.10 lbs (5.94 kg)
Terminals
Faston Quick Disconnect Tabs
Case
ABS Plastic
0.250 x 0.032 in. (0.635 x
0.0813 cm)
Table 1-7
Battery Electrical Characteristics
Characteristic
Battery type
Comment
Measurement
Sealed Lead Acid
Rechargeable
Nominal voltage (per battery) 12 V (six cells in series)
*Nominal capacity (per
battery)
Operating temperature range
20 hour rate
18 ampere-hours
-40°C to +60°C
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Table 1-7
Battery Electrical Characteristics
Charging temperature range
Charge voltage provided
-20°C to +40°C
Four batteries in float
mode
Charge current provided
54.0 V dc to 55.0 V dc
(54.4 V dc nominal)
750 mA maximum
*Capacity can vary based on customer requirements
Additional Notes:
Note 1: To minimize the effects of individual battery differences,
which detrimentally affect recharging, all four batteries should be of
the same age, storage history, and usage. All batteries must be
replaced at the same time.
Note 2: Battery discharging is limited to 42 V across 4 batteries (10.5
V dc per battery).
Note 3: Recharging is disconnected above +37°C.
Windows NT Workstation
The Windows NT workstation is shipped as part of the GPS base station
package. The specific configuration is designed for optimal performance
and maintenance of the GPS base station. The workstation is shipped
with the software installed on the system.
The NT workstation is a customized Dell workstation that includes the
following components:
• Intel Celeron processor with Intel 810 chipset
64 Mbyte SDRAM memory
Enhanced IDE 7 Gbyte hard drive
CD-ROM Drive and 3.5-in. floppy drive
•
Dell E550 15 in. monitor
•
Quietkey keyboard
•
Two-button PS/2 Mouse
•
Internal modem and cable for connectivity to the LAK laptop
Software Components
The Windows NT workstation that is shipped with the GPS base station
is installed with all the software that is needed to establish the GPS base
station reference data. Certain software parameters do need to be configured to enable the GPS base station to effectively communicate during
OptiMesh Base Station Installation and User Guide M-B1
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the link acquisition process, and to properly collect GPS base station positioning data.
In the event the software needs to be reinstalled, please refer to the
installation notes in Chapter 8, Troubleshooting.
Geodetic Base Station Software (GBSS)
The GBSS software is a Windows NT and 2000 program specifically
designed for continuous logging of high-quality GPS data. After a period
of writing to a file, the file is closed and a new one is opened. This length
of time is 1 hour by default, but can be made longer. In practice, there is
approximately a 5 second delay between one file closing and the next one
opening, which will invalidate measurements made across that delay.
As part of the software licensing requirements, the GBSS software
requires a hardware key—a “dongle”—be attached to the NT workstation’s parallel port in order to run. The dongle is provided with the NT
workstation.
CAUTION
Safeguard the GBSS software dongle.
Replacing a lost hardware dongle/key requires the
purchase of an additional software license; please ensure
the hardware dongle/key is kept securely on the NT
workstation at all times.
Locus Processor Software
The Locus Processor software is AirFiber software that performs the timing association between data collected at the remote node and the data
collected at the base station.
Additional Utility Programs
Cygnus BASH, PKZIP, Tornado FTP daemon, TweakUI, perform various
utilities in the site commissioning process.
Locus Survey Project Manager
The Locus Survey Project Manager software computes the base station’s
position data. This is used for determining the “seed” value or reference
value of the base station position for the entire OptiMesh network.
Instructions for obtaining reference data are provided in Chapter 6,
Obtaining GPS Base Station Reference Data.
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System Requirements
The GPS base station software is designed for use on a Windows NT 4.0
system. The NT workstation is shipped as part of the GPS base station
package. In the event the workstation needs to be replaced, please contact AirFiber customer support for information about system requirements for the NT workstation.
GPS Base Station Parts Listing
All the components needed for the GPS base station assembly will be provided in the packaging sent to your site, with the exception of some standard tools listed in Chapter Two, Tools and Materials.
INFORMATION
The component list will vary, depending upon the configuration
selected for your site.
For those sites using the Indoor Configuration, the necessary crimp tools
and connectors will be provided.
The parts used for all GPS base station configurations are listed below.
Verify shipped components against the items in this list identified for
your configuration, and if replacement parts are required, use this list to
identify needed components.
Note: Excess hardware may be included as spares.
Table 1-8
GPS Base Station Parts
AirFiber
Part Number
Qty
Used
Description
395-0031-001
1
GBS indoor receiver
072-0051-000
1
GBS antenna
072-0050-000
1
Coaxial cable—33 ft (10 m) with connectors
(outdoor configuration)
072-0036-000
1
Coaxial cable—500 ft (152.4 m) with
connectors
(indoor configuration)
072-0016-000
1*
Modem, fiber-optic, RS232, async, high
temp (serial fiber-optic converter modem)
(indoor coaxial and fiber option, and
outdoor configurations)
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AirFiber
Part Number
Qty
Used
Description
300-0017-002
1
AirFiber outdoor receiver enclosure
(environmentally hardened receiver
enclosure) (outdoor configuration)
072-0035-000
1
Surge protector, coax in-line, GPS
(indoor configurations)
072-0038-000
0-5**
Connector, N-type, Male
072-0039-000
1
Tool, crimp (0.429 hex)
072-0040-000
1
Tool, cable prep, LMR-400
700-0043-001
1
GBS User Manual (CD-ROM) or AirFiber
Web site
300-0016-002
1
GBS battery assembly enclosure***
(outdoor configuration, optional)
022-0017-000
1
Batteries***
(outdoor configuration, optional)
072-0044-000
1
Computer, GPS base station
101-0089-001
1
RS-232 cable
395-0032-001
1
Parapet mount (wall, corner and
penthouse)
395-0033-001
1
Tripod mount
Note: *Two serial fiber-optic converter modems will be provided for
the indoor configuration, fiber-optic option. For the outdoor
configuration, the 2nd fiber-optic converter modem is included in the
outdoor receiver enclosure.
Note: **Five connectors will be shipped for both indoor
configurations; four are used at each end of the cable attachment and
one is a spare.
Note: ***Please note that the battery backup unit is optional, and is
applicable only to the outdoor configuration.
Please see Configuration Options in Chapter Two for additional information about the indoor and outdoor configurations.
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INFORMATION
For documentation and software updates, please visit
www.airfiber.com.
OptiMesh Base Station Installation and User Guide M-B1