Edgetech 2000-TVD User manual

EdgeTech
4 Little Brook Road
West Wareham, MA 02576
Tel: [phone]
Fax: [phone]
www.EdgeTech.com
2000-TVD COMBINED SONAR
USER HARDWARE MANUAL
0017424_REV_B 2/3/2018

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2000-TVD COMBINED SONAR 0017424_REV_B
The information, figures, and specifications in this manual are proprietary and are issued in strict
confidence on condition that they not be copied, reprinted, or disclosed to a third party, either wholly or
in part, without the prior, written consent of EdgeTech. Any reproduction of EdgeTech supplied software
or file sharing is strictly prohibited.
EdgeTech © 2016. All rights reserved.

iii
ATTENTION – READ THIS FIRST!
All personnel involved with the installation, operation, or maintenance of the equipment described in this
manual should read and understand the warnings and cautions provided below.
CAUTION!This equipment contains devices that are extremely sensitive
to static electricity. Therefore, extreme care should be taken when
handling them. Normal handling precautions involve the use of anti-static
protection materials and grounding straps for personnel.
WARNING!High Voltage may be present in all parts of the system.
Therefore, use caution when the electronics are removed from their
containers for servicing.
CAUTION!Operation with improper line voltage may cause serious
damage to the equipment. Always ensure that the proper line voltage is
used.

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2000-TVD COMBINED SONAR 0017424_REV_B
HARDWARE VARIATIONS AND COMPATIBILITY
The 2000-TVD Combined Sonar contains both standard and proprietary hardware. At times, EdgeTech
may change the standard components due to their availability or performance improvements. Although
the component manufacturers—along with their models and styles—may change from unit to unit,
replacement parts will generally be interchangeable.
EdgeTech will make every effort to see that replacement components are interchangeable and use the
same software drivers (if applicable). At times, however, direct replacements may not exist. When this
happens, EdgeTech will provide the necessary drivers with the replacement part, if applicable.
EdgeTech may also change certain hardware per customer requirements. Therefore, portions of this
manual, such as parts lists and test features, are subject to change. These sections should be used for
reference only. When changes are made that affect system operation, they will be explicitly noted. Also,
some options and features may not be active in the customer’s unit at time of delivery. Upgrades will be
made available when these features are implemented.
Contact EDGETECH CUSTOMER SERVICE with any questions relating to compatibility.

v
ABOUT THIS DOCUMENT
We, the employees at EdgeTech, would like to thank you for purchasing a 2000-TVD Combined Sonar. At
EdgeTech, it is our policy to provide high-quality, cost-effective products and support services that meet
or exceed your requirements. We also strive to deliver them on-time, and to continuously look for ways
to improve them. We take pride in the products we manufacture, and want you to be entirely satisfied
with your equipment.
Purpose of this Manual
The purpose of this manual is to provide the user with information on the setup and use of EdgeTech’s
2000-TVD Combined Sonar. Although this manual encompasses the latest operational features of the
2000-TV, some features may be periodically upgraded. Therefore, the information in this manual is subject
to change and should be used for reference only.
Liability
EdgeTech has made every effort to document the 2000-TVD in this manual accurately and completely.
However, EdgeTech assumes no liability for errors or for any damages that result from the use of this
manual or the equipment it documents. EdgeTech reserves the right to upgrade features of this
equipment, and to make changes to this manual, without notice at any time.
Warnings, Cautions, and Notes
Where applicable, warnings, cautions, and notes are provided in this manual as follows:
WARNING! Identifies a potential hazard that could cause injury or death.
CAUTION! Identifies a potential hazard that could damage equipment or
data.
NOTE: Recommendations or general information that is particular to the
material being presented.
Revision History
REVISION
DESCRIPTION
DATE
APPROVAL
A
Initial Document Release
08/19/2015
TS
B
Updates to Manual
02/03/2018
TS

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2000-TVD COMBINED SONAR 0017424_REV_B
WARRANTY STATEMENT
All equipment manufactured by EdgeTech is warranted against defective components and workmanship
for a period of one year after shipment. Warranty repair will be done by EdgeTech free of charge.
Shipping costs are to be borne by the customer. Malfunction due to improper use is not covered in the
warranty, and EdgeTech disclaims any liability for consequential damage resulting from defects in the
performance of the equipment. No product is warranted as being fit for a particular purpose, and there is
no warranty of merchantability. This warranty applies only if:
i. The items are used solely under the operating conditions and in the manner recommended in
Seller's instruction manual, specifications, or other literature.
ii. The items have not been misused or abused in any manner, nor have repairs been attempted
thereon without the approval of EdgeTech Customer Service.
iii. Written notice of the failure within the warranty period is forwarded to Seller and the directions
received for properly identifying items returned under warranty are followed.
iv. The return notice authorizes Seller to examine and disassemble returned products to the extent
Seller deems necessary to ascertain the cause for failure.
The warranties expressed herein are exclusive. There are no other warranties, either expressed or implied,
beyond those set forth herein, and Seller does not assume any other obligation or liability in connection
with the sale or use of said products. Any product or service repaired under this warranty shall be
warranted for the remaining portion of the original warranty period only.
Equipment not manufactured by EdgeTech is supported only to the extent of the original manufacturer's
warranties.
CAUTION! If your product is a portable topside, never attempt to ship it
in its Storm CaseTM alone. Shipping portable topsides without an exterior
shipping crate will void the warranty.

vii
SOFTWARE SERVICE OVERVIEW
EdgeTech provides software services free of charge. This software agreement does not address customer-
specified modifications or enhancements. These services may be ordered separately. Furthermore,
EdgeTech software upgrades are meant for the sole use of EdgeTech customers. Any reproduction of
EdgeTech-supplied software or file sharing is strictly prohibited.
Software Updates and Enhancements
EdgeTech customers can download new software releases with all modifications and enhancements from
the EdgeTech ftp site. Major software issues, should they occur, will be reported directly to the customer.
New software releases consist of the following:
•Software enhancements that are not on the price list
•Software fixes and changes
•Product integration
•Documentation updates to on-line help
•Tests for compatibility with other modules
Software patches consist of software that has undergone the following:
•Minor software enhancements
•Software fixes and changes
•Software Telephone, Facsimile, and E-mail Support
EdgeTech customers are entitled to contact EDGETECH CUSTOMER SERVICE by telephone, facsimile, or e-mail
to report a difficulty, to discuss a problem or to receive advice on the best way to perform a task. When
contacted, EdgeTech Customer Service will do the following:
•Respond within 24 hours
•Immediately attend to serious problems affecting operations
•Attempt to find an immediate work-around

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2000-TVD COMBINED SONAR 0017424_REV_B
RETURNED MATERIAL AUTHORIZATION
Prior to returning any equipment to EdgeTech, a Returned Material Authorization (RMA) number must be
obtained. The RMA will help us identify your equipment when it arrives at our receiving dock and track
the equipment while it is at our facility. The material should be shipped to the address provided in the
EDGETECH CUSTOMER SERVICE section. Please refer to the RMA number on all documents and
correspondences as well.
All returned materials must be shipped prepaid. Freight collect shipments will not be accepted. EdgeTech
will pay freight charges on materials going back to the customer after they have been evaluated and/or
repaired.
CAUTION! If your product is a portable topside, never attempt to ship it
in its Storm CaseTM alone. Although rugged, these cases are not intended
to be used as shipping containers, and the delicate internal components
could be damaged if used in this manner.
The following steps apply only to material being returned from outside the Continental United States.
Follow them carefully to prevent delays and additional costs.
1. All shipments must be accompanied by three copies of your proforma invoice, showing the value
of the material and the reason for its return. If the reason is for repair, it must be clearly stated in
order to move through customs quickly and without duties being charged. Whenever possible,
please send copies of original export shipping documents with the consignment.
2. If the value of the equipment is over $1000, the following Shipper's oath must be sent with the
invoice. This oath can be typed on the invoice, or on a separate letterhead:
"I, ______________________________, declare that the articles herein specified are the
growth, produce, or manufacture of the United States; that they were exported from the
United States from the port of _____________________, on or about _______________;
that they are returned without having been advanced in value or improved in condition
by any process of manufacture or any other means; and that no drawback, or allowance
has been paid or admitted hereof."
Signed ______________________________

ix
3. If there is more than one item per consignment, a packing list must accompany the shipment. It
is acceptable to combine the proforma invoice and packing list if the contents of each carton are
clearly numbered and identified on the invoice.
4. Small items can be shipped prepaid directly to EdgeTech by FedEx, DHL, UPS, Airborne, etc.
5. If the equipment is the property of EdgeTech (formerly EG&G Marine Instruments Division),
please insure for full value.
6. Fax one invoice, packing list, and a copy of the airway bill to EdgeTech upon shipment.

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2000-TVD COMBINED SONAR 0017424_REV_B
CUSTOMER SERVICE
Customer service personnel at EdgeTech are always eager to hear from users of our products. Your
feedback is welcome, and is a valuable source of information which we use to continually improve these
products. Therefore, we encourage you to contact EdgeTech Customer Service to offer any suggestions
or to request technical support:
NOTE: Please have your system Model and Serial Number available when
contacting Customer Service.
E-mail: [e-mail]
Mail: 4 Little Brook Road
West Wareham, MA 02576
Telephone: [phone]
Facsimile: [phone]
24-Hour Emergency
Technical Support Line: [phone]
For more information please go to www.EdgeTech.com.

xi
COMPANY BACKGROUND
EdgeTech (formerly EG&G Marine Instruments) traces its history in underwater data acquisition and
processing back to 1966. EdgeTech has designed, developed, and manufactured products, instruments,
and systems—for the acquisition of underwater data, including marine, estuarine, and coastal
applications—for over 45 years.
The company has responded to the needs of the scientific, Naval, and offshore communities by providing
equipment—such as sub-bottom profilers, side scan sonar, acoustic releases, USBL positioning systems,
and bathymetric systems—that have become standards in the industry.
EdgeTech has also consistently anticipated and responded to future needs through an active research and
development program. Current efforts are focused on the application of cutting-edge CHIRP and acoustic
technology.

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2000-TVD COMBINED SONAR 0017424_REV_B
TABLE OF CONTENTS
ATTENTION – READ THIS FIRST! .........................................................................................................iii
HARDWARE VARIATIONS AND COMPATIBILITY..................................................................................iv
ABOUT THIS DOCUMENT....................................................................................................................v
Purpose of this Manual............................................................................................................................. v
Liability...................................................................................................................................................... v
Warnings, Cautions, and Notes................................................................................................................. v
Revision History ........................................................................................................................................ v
WARRANTY STATEMENT ...................................................................................................................vi
SOFTWARE SERVICE OVERVIEW........................................................................................................vii
Software Updates and Enhancements.................................................................................................... vii
RETURNED MATERIAL AUTHORIZATION ..........................................................................................viii
CUSTOMER SERVICE...........................................................................................................................x
COMPANY BACKGROUND .................................................................................................................xi
TABLE OF CONTENTS........................................................................................................................xii
LIST OF FIGURES.............................................................................................................................. xvi
LIST OF TABLES ............................................................................................................................. xviii
1.0 OVERVIEW.............................................................................................................................1-1
1.1 Applications ...............................................................................................................................1-1
1.2 Main System Components.........................................................................................................1-1
1.2.1 Topside Computer ................................................................................................................1-2
1.2.2 STARMUX III ..........................................................................................................................1-2
1.2.3 2000-TVD Towfish.................................................................................................................1-3
1.2.4 Tow Cables............................................................................................................................1-6
1.3 Optional Equipment ..................................................................................................................1-6
1.3.1 Magnetometer......................................................................................................................1-6
1.3.2 Pressure Sensor ....................................................................................................................1-7
1.3.3 Power Loss Pinger.................................................................................................................1-7
1.3.4 Responder.............................................................................................................................1-7
1.4 Full Spectrum Chirp Technology Overview................................................................................1-7
1.4.1 Separate Sub-Bottom Acoustic Projectors and Receivers ....................................................1-7

xiii
1.4.2 High Signal-to-Noise Ratio ....................................................................................................1-8
1.4.3 High Repeatability.................................................................................................................1-8
1.4.4 High Resolution.....................................................................................................................1-8
1.4.5 Reduction of Side Lobes .......................................................................................................1-8
1.4.6 Additional Processing Gain ...................................................................................................1-9
1.4.7 Gaussian Shaped Amplitude Spectrum Outgoing Pulse .......................................................1-9
2.0 SPECIFICATIONS.....................................................................................................................2-1
2.1 Topside Computer .....................................................................................................................2-1
2.2 STARMUX III Digital Telemetry Link Specifications....................................................................2-3
2.3 2000-TVD Specifications ............................................................................................................2-4
2.4 Cable Specifications.................................................................................................................2-15
3.0 SETUP AND ACTIVATION ........................................................................................................3-1
3.1 Unpacking and Inspection .........................................................................................................3-1
3.2 Power Requirements .................................................................................................................3-2
3.2.1 Use of an Uninterruptable Power Supply.............................................................................3-2
3.2.2 Changing to a Non-US Power Plug........................................................................................3-2
3.3 Navigation Interface ..................................................................................................................3-2
3.4 Topside Location—Best Practices..............................................................................................3-3
3.5 Topside Connections, Controls, and Indicators .........................................................................3-3
3.5.1 Topside Computer Connections ...........................................................................................3-3
3.5.2 Topside Computer Controls and Indicators..........................................................................3-4
3.5.3 STARMUX III Digital Telemetry Link Connections.................................................................3-8
3.5.4 STARMUX III Digital Telemetry Link Controls and Indicators ...............................................3-8
3.6 TCP/IP Address Settings.............................................................................................................3-9
3.7 Connecting the System Components ........................................................................................3-9
3.7.1 Connecting and Attaching the Tow Cable to the Towfish ..................................................3-10
3.7.2 Connecting the 2000 Topside Computer............................................................................3-10
3.8 System Activation and Test .....................................................................................................3-11
3.8.1 Activating the System .........................................................................................................3-11
3.8.2 Performing the Pre-deployment Checks ............................................................................3-13
3.9 Towfish Deployment................................................................................................................3-16
3.10 Towfish Recovery.....................................................................................................................3-17

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2000-TVD COMBINED SONAR 0017424_REV_B
4.0 TECHNICAL DESCRIPTION .......................................................................................................4-1
4.1 2000 Topside computer.............................................................................................................4-1
4.1.1 Topside Computer ................................................................................................................4-1
4.1.2 STARMUX III Digital Telemetry Link......................................................................................4-3
4.1.2.1 Selecting Negative Edge Triggering for the Optional Responder .................................4-4
4.2 2000-TVD Towfish Description ..................................................................................................4-8
5.0 MAINTENANCE ......................................................................................................................5-1
5.1 Periodic Maintenance................................................................................................................5-1
5.1.1 Inspecting and Cleaning the Towfish and Tow Cable after Use ...........................................5-1
5.1.2 Inspecting and Cleaning the Underwater Connectors..........................................................5-1
5.1.3 Storage..................................................................................................................................5-2
5.1.4 Recommended Spares..........................................................................................................5-2
5.2 Restoring the Operating System to the Hard Drive...................................................................5-2
5.3 Disassembling and Reassembling the Towfish ..........................................................................5-2
5.3.1 Reassembling the Tow Vehicle .............................................................................................5-4
5.4 Calibrating the Compass............................................................................................................5-5
5.4.1 Changing the Angle of Declination .....................................................................................5-12
6.0 TROUBLESHOOTING...............................................................................................................6-1
6.1 2000 Topside computer Troubleshooting Guide.......................................................................6-1
6.2 STARMUX III Digital Telemetry Link Troubleshooting Guide.....................................................6-3
6.3 Towfish Troubleshooting Guide ................................................................................................6-4
6.3.1 Equipment Required.............................................................................................................6-5
6.3.2 Transmission Verification .....................................................................................................6-6
6.3.3 Sonar Processor and Data Link .............................................................................................6-6
6.3.4 Topside Power Unit ..............................................................................................................6-6
6.3.5 Command and Data Link.......................................................................................................6-7
6.3.6 Data link ................................................................................................................................6-7
6.3.7 Towfish..................................................................................................................................6-8
6.3.7.1 Preliminary....................................................................................................................6-8
6.3.7.2 No Sonar Data...............................................................................................................6-8
6.3.7.3 Power Supplies .............................................................................................................6-9
6.3.7.4 Test Lights.....................................................................................................................6-9

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6.3.7.5 DDC Test points ..........................................................................................................6-10
6.3.7.6 Modem Board Test Points ..........................................................................................6-10
6.3.7.7 Other Checks ..............................................................................................................6-10
6.3.8 Tow Cables..........................................................................................................................6-11
6.3.8.1 Shorted Wire...............................................................................................................6-11
6.3.8.2 Open Wire...................................................................................................................6-11
6.3.8.3 Insulation Resistance Breakdown...............................................................................6-12
6.3.8.4 Damaged Tow Cable Connector .................................................................................6-12
6.4 Part Numbers for Major Topside Components .......................................................................6-13
6.5 Part Numbers for Major 2000-TVD Towfish Components ......................................................6-13
A.0 SYSTEM RESTORE ................................................................................................................ A-1
B.0 PRINTERS ............................................................................................................................ B-1

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2000-TVD COMBINED SONAR 0017424_REV_B
LIST OF FIGURES
Figure 1-1: Rackmount Topside and Components.....................................................................................1-3
Figure 1-2: 2000-TVD Towfish Parts...........................................................................................................1-5
Figure 1-3: Kevlar Reinforced Tow Cable...................................................................................................1-6
Figure 2-1: Overall Towfish ICD Diagram ...................................................................................................2-8
Figure 2-2: Fiberglass Shell of Towfish.......................................................................................................2-9
Figure 2-3: Tow Bridle Drawing 1.............................................................................................................2-10
Figure 2-4: Tow Bridle Drawing 2.............................................................................................................2-11
Figure 2-5: Towfish Assembly Drawing 2.................................................................................................2-12
Figure 2-6: Towfish Assembly Drawing 3.................................................................................................2-13
Figure 2-7: Towfish Assembly Drawing 4.................................................................................................2-14
Figure 2-8: Test and Deck Cable Setups...................................................................................................2-15
Figure 2-9: 300 Meter Tow Cable Specification Drawing ........................................................................2-16
Figure 2-10: 100 Meter Tow Cable Specification Drawing ......................................................................2-17
Figure 2-11: 15M Test Cable ....................................................................................................................2-18
Figure 2-12: Deck Cable ...........................................................................................................................2-19
Figure 2-13: Armored Tow Cable with PMI Grip......................................................................................2-20
Figure 3-1: Rack Mount Topside Front Panel.............................................................................................3-5
Figure 3-2: Rack Mount Topside Back Panel..............................................................................................3-7
Figure 3-3: System Cables ........................................................................................................................3-10
Figure 3-4: DISCOVER 2000-C Dual Frequency Side Scan and DISCOVER Sub-Bottom Windows ...........3-12
Figure 3-5: Lower Control Panel, Transmit Tab—DISCOVER 2000-C Dual Frequency Side Scan.............3-13
Figure 3-6: Options Dialog Box, Sonar Control Tab—DISCOVER Sub-Bottom .........................................3-14
Figure 3-7: Options Dialog Box, Display Tab—DISCOVER Sub-Bottom....................................................3-15
Figure 3-8: Lower Control Panel, Bottom Track Tab—DISCOVER 2000-C ...............................................3-17
Figure 4-1: Topside Computer Internal Components ................................................................................4-2
Figure 4-2: Location of Jumper JP6 on the Power Board in the FSIU STARMUX III ...................................4-4
Figure 4-3: STARMUX III—Internal Components .......................................................................................4-5
Figure 4-4: STARMUX III—Block Diagram ..................................................................................................4-6
Figure 4-5: STARMUX III—Wiring Diagram ................................................................................................4-7

xvii
Figure 4-6: Towfish—Electronics Chassis.................................................................................................4-11
Figure 4-7: 2000-TVD Towfish—Block Diagram.......................................................................................4-12
Figure 5-1: 2000-TVD Towfish with Top Shell Removed............................................................................5-3
Figure 5-2: EndCap of Electronics Bottle (Connected)...............................................................................5-3
Figure 5-3: Electronics Bottle Connector End Cap.....................................................................................5-4
Figure 5-4: Remote Desktop Icon ..............................................................................................................5-5
Figure 5-5: Remote Desktop Splash Screen...............................................................................................5-6
Figure 5-6: Remote Desktop Warning Screen............................................................................................5-6
Figure 5-7: Closing Sonar.exe.....................................................................................................................5-7
Figure 5-8: Tera Term Icon.........................................................................................................................5-7
Figure 5-9: Tera Term Splash Screen .........................................................................................................5-8
Figure 5-10. Terra Term Port Set-up..........................................................................................................5-9
Figure 5-11. Motion Sensor Serial Output .................................................................................................5-9
Figure 5-12. Motion Sensor Calibration Result........................................................................................5-10
Figure 5-13. Motion Sensor Serial Output ..............................................................................................5-11
Figure 5-14: Compass Calibration Table ..................................................................................................5-12
Figure 5-15 ...............................................................................................................................................5-13
Figure 5-16 ...............................................................................................................................................5-13
Figure 5-17: Magnetic Declination Estimated Value Screen....................................................................5-14
Figure 5-18: Angle of Declination Calculated...........................................................................................5-15
Figure 5-19 ...............................................................................................................................................5-16
Figure 6-1: SockBlast Window ...................................................................................................................6-7

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LIST OF TABLES
Table 2-1: Topside Computer Specifications .............................................................................................2-2
Table 2-2: STARMUX III Digital Telemetry Link Specifications ...................................................................2-3
Table 2-3: 2000-TVD Towfish Specifications..............................................................................................2-6
Table 3-1: AC Power Cord Wiring ..............................................................................................................3-2
Table 3-2: STARMUX III Devices TCP/IP Addresses....................................................................................3-9
Table 3-3: Towfish Ethernet Devices IP Addresses ....................................................................................3-9
Table 6-1: 2000 Topside computer—Troubleshooting Guide ...................................................................6-3
Table 6-2: STARMUX III Digital Telemetry Link—Troubleshooting Guide..................................................6-4
Table 6-3: Main Voltage Test Points on Tow Fish Power Distribution Board ............................................6-9
Table 6-4: Other Voltages on SSB Board....................................................................................................6-9
Table 6-5: Major Topside Components and Part Numbers .....................................................................6-13
Table 6-6: Major 2000-TVD Towfish Components and Part Numbers ....................................................6-14

1-1
1.0 OVERVIEW
The EdgeTech 2000-TVD (Deep Tow Vehicle) Combined Side Scan Sonar and Sub-Bottom Profiling System
is a combination frequency modulated (FM) dual frequency side scan sonar and a high-resolution FM sub-
bottom profiler that uses EdgeTech’s proprietary Full Spectrum “chirp” technologies to simultaneously
generate both high resolution side scan imagery at longer ranges and high resolution cross sectional
images of the seabed at deeper penetrations than conventional continuous wave (CW) systems.
The 2000-TVD Combined Side Scan Sonar and Sub-Bottom Profiling System is designed to provide 100/400
or 300/600 Hz Side Scan and 1-10 kHz Bottom Scan Sonar in a single pressure housing that is mounted in
a 2000-TVD tow vehicle. The Sub-Bottom receive array is comprised of two individual sensor units that
are externally parallel summed before being connected to the electronics’ pressure housing for
processing. External to the pressure housing is a Kongsberg Mesotech Model 1007D (vendor part number
974-7109000) Altimeter and a Paroscientific 8CB4000-I Depth Sensor.
The two side scan frequencies, along with the sub bottom frequency, are transmitted simultaneously as
linearly swept wide band high energy acoustic pulses (also called "chirp pulses") over a full spectrum
frequency range, and the received echoes are processed into high signal-to-noise (SNR) images which can
be directly displayed as shades of gray or color on a computer monitor and printed on a continuous feed
thermal printer. The data can also be stored in real time onto a large capacity hard drive and archived
onto a DVD.
1.1 Applications
Applications for the 2000-TVD Combined Sonar are many, including:
•Archeological surveys
•Geological/geophysical surveys
•Sediment classification
•Buried cable and pipeline surveys
•Dredging and coastal studies
•Pre/post dredging surveys
•Scour/erosion investigation
•Marine construction surveys
1.2 Main System Components
The 2000-TVD system is composed of two main components: a 2000 rack mount topside and a 2000-TVD
towfish. The rack mount topside includes a computer and a STARMUX III digital telemetry link installed in
a 19-inch rack enclosure, along with a keyboard, a trackball, and two LCD monitors. These components
are shown in FIGURE 1-1. The 2000-TVD towfish is shown in FIGURE 1-2. Optionally included is a tow cable
up to 6,000 meters in length. (Contact EDGETECH CUSTOMER SERVICE for cable type versus length).

1-2 1.0: OVERVIEW
2000-TVD COMBINED SONAR 0017424_REV_B
1.2.1 Topside Computer
The topside computer is a PC contained within a ruggedized 19-inch 4U chassis. It controls the towfish's
sonars and processes, stores, and displays received side scan and sub-bottom data, as well as sensor data
and status information. A keyboard, a trackball, two LCD monitors, a DVD/RW drive, a 1-TB hard drive for
data storage, and a 500-GB hard drive for the operating system are included with the topside computer.
The computer can also interface with a user-provided printer (see PRINTERS).
The topside computer interfaces with the STARMUX III over a 10/100/1000BaseT Ethernet connection,
and includes EdgeTech’s DISCOVER 2000-C Dual Frequency Side Scan Sonar software and DISCOVER Sub
Bottom software preinstalled, along with the Windows 7 operating system.
1.2.2 STARMUX III
The STARMUX III digital link provides power for the towfish, while acting as an interface between the
topside computer and the towfish. The STARMUX III provides downlink telemetry to the towfish for sonar
control and receives uplink side scan and sub bottom data, sensor data, and status information from the
towfish. Interfacing with the topside computer over a 10/100/1000BaseT Ethernet connection, the
STARMUX III includes both towfish and DC power supplies, an asynchronous digital subscriber line (ADSL)
modem, and an Ethernet switch, all within a single 19-inch 2U chassis.