Edgetech 2000-CSS User Manual
EdgeTech
2000-CSS COMBINED SONAR
USER HARDWARE MANUAL
0017423_REV_C February 2018
4 Little Brook Road
West Wareham, MA 02576
Tel: (508) 291-0057
Fax: (508) 291-2491
www.EdgeTech.com
ii
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.
DISCOVER™ is a trademark of EdgeTech
G624 ® is a registered trademark of Novagard®
Windows® is a registered trademark of the Microsoft® Corporation
Core™ is a trademark of Intel®
2000-CSS COMBINED SONAR 0017423_REV_C
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.
iv
HARDWARE VARIATIONS AND COMPATIBILITY
The 2000-CSS 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 E
DGETECH CUSTOMER SERVICE with any questions relating to compatibility.
2000-CSS COMBINED SONAR 0017423_REV_C
v
REVISION
DESCRIPTION
DATE
APPROVAL
A
Release to Production
08/19/2015
TW B Updates to Manual
10/17/2016
TW C Updates to Manual
02/03/2018
TS
ABOUT THIS DOCUMENT
We, the employees at EdgeTech, would like to thank you for purchasing 2000-CSS Combined Sonar
System. 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-CSS. Although this manual encompasses the latest operational features of the 2000-CSS, 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-CSS 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
vi
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.
2000-CSS COMBINED SONAR 0017423_REV_C
vii
SOFTWARE SERVICE OVERVIEW
EdgeTech provides software services free of charge. This software agreement does not address customerspecified 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
viii
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
E
DGETECH 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.
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 ______________________________
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 as long as 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.
2000-CSS COMBINED SONAR 0017423_REV_C
ix
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 Serial Number available when contacting
Customer Service.
E-mail: service@edgetech.com
Mail: 4 Little Brook Road
West Wareham, MA 02576
Telephone: (508) 291-0057
Facsimile: (508) 291-2491
24-Hour Emergency
Technical Support Line: (508) 942-8043
For more information please go to www.EdgeTech.com
.
x
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.
2000-CSS COMBINED SONAR 0017423_REV_C
xi
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
WARRANTY STATEMENT ................................................................................................................... vi
SOFTWARE SERVICE OVERVIEW ........................................................................................................ vii
Software Updates and Enhancements.................................................................................................... vii
RETURNED MATERIAL AUTHORIZATION .......................................................................................... viii
CUSTOMER SERVICE .......................................................................................................................... ix
COMPANY BACKGROUND .................................................................................................................. x
TABLE OF CONTENTS ......................................................................................................................... xi
LIST OF FIGURES IN DOCUMENT ...................................................................................................... xiv
LIST OF TABLES IN DOCUMENT ........................................................................................................ xvi
1.0: OVERVIEW 1-1
1.1 2000-CSS Applications .................................................................................................................. 1-1
1.2 Main System Components ............................................................................................................ 1-2
1.2.1 Topside Computer .................................................................................................................. 1-2
1.2.2 STARMUX III ............................................................................................................................ 1-2
1.2.3 2000-CSS 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
xii
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 .............................................................................................. 2-3
2.3 2000-CSS Towfish .......................................................................................................................... 2-4
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 ................................................................... 3-7
3.5.4 STARMUX III Digital Telemetry Link Controls and Indicators ................................................. 3-7
3.6 TCP/IP Address Settings ................................................................................................................ 3-8
3.7 Connecting the System Components ............................................................................................ 3-8
3.7.1 Connecting and Attaching the Tow Cable to the Towfish ...................................................... 3-9
3.7.2 Connecting the 2000 Topside computer .............................................................................. 3-10
3.8 System Activation and Test ......................................................................................................... 3-10
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
2000-CSS COMBINED SONAR 0017423_REV_C
xiii
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 Towfish .......................................................................................................................................... 4-8
4.3 Cables .......................................................................................................................................... 4-13
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 Disassembling the Towfish ..................................................................................................... 5-3
5.3.2 Reassembling the Towfish ...................................................................................................... 5-4
5.4 Calibrating the Compass ............................................................................................................... 5-4
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 .................................................................................................... 6-5
6.3.1 Equipment Required............................................................................................................... 6-6
6.3.2 Transmission Verification ....................................................................................................... 6-6
6.3.3 Sonar Processor and Data Link ............................................................................................... 6-6
6.3.4 Topside Power Unit ................................................................................................................ 6-7
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 ....................................................................................................................... 6-9
xiv
6.3.7.2 No Sonar Data .................................................................................................................. 6-9
6.3.7.3 Power Supplies ................................................................................................................. 6-9
6.3.7.4 Test Lights ...................................................................................................................... 6-10
6.3.7.5 DDC Test points .............................................................................................................. 6-11
6.3.7.6 Modem Board Test Points ............................................................................................. 6-11
6.3.7.7 Other Checks .................................................................................................................. 6-11
6.3.8 Tow Cables ........................................................................................................................... 6-11
6.3.8.1 Shorted Wire .................................................................................................................. 6-11
6.3.8.2 Open Wire ...................................................................................................................... 6-12
6.3.8.3 Insulation Resistance Breakdown .................................................................................. 6-12
6.3.8.4 Damaged Tow cable Connector ..................................................................................... 6-13
6.4 Part Numbers for Major Topside Components .......................................................................... 6-13
6.5 Part Numbers for Major 2000-CSS Towfish Components .......................................................... 6-14
A.0: SYSTEM RESTORE ................................................................................................................. A-1
B.0: PRINTERS B-1
LIST OF FIGURES IN DOCUMENT
Figure 1-1: Rackmount Topside and Components ..................................................................................... 1-3
Figure 1-2: Towfish Parts ........................................................................................................................... 1-5
Figure 1-3: Kevlar Reinforced Tow Cable ................................................................................................... 1-6
Figure 3-1: Rack Mount Topside Front Panel ............................................................................................. 3-5
Figure 3-2: Rack Mount Topside Back Panel .............................................................................................. 3-6
Figure 3-3: System Cables .......................................................................................................................... 3-9
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
2000-CSS COMBINED SONAR 0017423_REV_C
xv
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
Figure 4-6: Towfish—Electronics Chassis ................................................................................................. 4-11
Figure 4-7: Towfish—Block Diagram ........................................................................................................ 4-12
Figure 4-8: Armored Cable, PMI Grip, Unterminated Topside ................................................................ 4-14
Figure 4-9: Test Cable .............................................................................................................................. 4-15
Figure 5-1: 2000-CSS Towfish with Teardrop Cover Removed ............................................................... 5-3
Figure 5-2: Electronics Bottle Connector End Cap .................................................................................... 5-3
Figure 6-9: Remote Desktop Icon .............................................................................................................. 5-4
Figure 6-10: Remote Desktop Splash Screen ............................................................................................. 5-5
Figure 6-11: Remote Desktop Warning Screen .......................................................................................... 5-5
Figure 6-12: Closing Sonar.exe ................................................................................................................... 5-6
Figure 6-13: Tera Term Icon ....................................................................................................................... 5-6
Figure 6-14: Tera Term Splash Screen ....................................................................................................... 5-7
Figure 6-15. Terra Term Port Set-up .......................................................................................................... 5-8
Figure 6-16. Motion Sensor Serial Output ................................................................................................. 5-8
Figure 6-17. Motion Sensor Calibration Result .......................................................................................... 5-9
Figure 6-18. Motion Sensor Serial Output .............................................................................................. 5-10
Figure 6-19: Tilt 0 degrees ....................................................................................................................... 5-10
Figure 6-20: Tilt -90 degrees .................................................................................................................... 5-10
Figure 6-21: Tilt +90 degrees ................................................................................................................... 5-11
Figure 6-22: Compass Calibration Table .................................................................................................. 5-11
Figure 6-23 ............................................................................................................................................... 5-12
Figure 6-24 ............................................................................................................................................... 5-13
Figure 6-25: Magnetic Declination Estimated Value Screen .................................................................... 5-14
Figure 6-26: Angle of Declination Calculated ........................................................................................... 5-15
Figure 6-27 ............................................................................................................................................... 5-16
Figure 6-1: SockBlast Window ................................................................................................................... 6-8
xvi
LIST OF TABLES IN DOCUMENT
Table 2-1: Topside Computer Specifications ............................................................................................. 2-2
Table 2-2: STARMUX III Digital Telemetry Link Specifications ................................................................... 2-3
Table 2-3: Tow Fish Specifications ............................................................................................................. 2-6
Table 3-1: AC Power Cord Wiring .............................................................................................................. 3-2
Table 3-2: STARMUX III Devices TCP/IP Addresses .................................................................................... 3-8
Table 3-3: Towfish Ethernet Devices IP Addresses .................................................................................... 3-8
Table 6-1: 2000 Topside computer—Troubleshooting Guide ................................................................... 6-3
Table 6-2: STARMUX III Digital Telemetry Link—Troubleshooting Guide.................................................. 6-5
Table 6-3: Main Voltage Test Points on Tow Fish Power Distribution Board .......................................... 6-10
Table 6-4: Other Voltages on SSB Board .................................................................................................. 6-10
Table 6-5: Major Topside Components and Part Numbers ..................................................................... 6-13
Table 6-6: Major 2000-CSS Towfish Components and Part Numbers ..................................................... 6-14
Table B-1: Printer Requirements ............................................................................................................... B-1
2000-CSS COMBINED SONAR 0017423_REV_C
1-1
1.0: OVERVIEW
The EdgeTech 2000-CSS combined series sonar system combines EdgeTech’s world leading side scan sonar
and sub-bottom profiling technologies into a single package. The system uses five channels (four side scan
and one for sub-bottom) to transmit simultaneously frequency modulated (FM) pulses.
The 2000-CSS uses EdgeTech’s proprietary Full Spectrum CHIRP technologies to simultaneously generate
both high-resolution side scan imagery at longer ranges conventional continuous (CW) systems, along
with high-resolution cross sectional images of the seabed at deeper penetrations than CW systems can
achieve.
The system comes available with a choice of two dual-frequency configurations for the side scan sonar:
100/400 kHz or 300/600 kHz, and uses a low frequency, 500–12 kHz sub-bottom sonar for greater bottom
penetration in water depths up to 300 meters.
Side scan frequencies and 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.
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.
A standard 2000-CSS system comes complete with a towfish, digital telemetry that runs over a single
coaxial cable up to 6,000 meters long, and a 19-inch rack mount topside running EdgeTech’s DISCOVER
acquisition software. Additionally, the 2000-CSS can be integrated with a number of auxiliary sensors to
track depth, altitude, and magnetrometry. The system can able be equipped with a USBL responder.
1.1 2000-CSS Applications
Applications for the 2000-CSS Combined side scan sonar and sub-bottom profiling system include:
• 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 1.0: OVERVIEW
1.2 Main System Components
The 2000-CSS system is composed of two main components: a 2000 rack mount topside and a 2000-CSS
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
up to 6,000 meters in length. (Contact E
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 B.0:
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.
FIGURE 1-1. The 2000-CSS towfish is shown in FIGURE 1-2. Optionally included is a tow cable
DGETECH CUSTOMER SERVICE for cable type versus length).
PRINTERS).
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.
2000-CSS COMBINED SONAR 0017423_REV_C
1-3
Rack Mount
Topside
STARMUX III
Digital
Telemetry Link
2000 Topside
Computer
Keyboard
Trackball
LCD Monitors
Figure 1-1: Rackmount Topside and Components
1.2.3 2000-CSS Towfish
The 2000-CSS Towfish contains the side scan transducer arrays, the sub bottom transducer, and the subbottom hydrophone arrays, along with the electronics required to transmit and to receive the sonar
signals, to receive the downlink commands from the topside computer and to provide the uplink side scan
data, sensor data and status information to the topside computer.
1-4 1.0: OVERVIEW
The towfish is available with a choice of 100/400 kHz or 300/600 kHz dual and simultaneous FM chirp
operating frequencies for the side scan sonar. The sonar electronics are contained inside a single
electronics bottle which includes a double O-ring sealed end cap on each end. The aft end cap contains
bulkhead connectors for connecting the transducers, the hydrophone arrays and optional equipment. The
towfish interfaces with the 2000 Topside computer over an Ethernet connection using digital subscriber
line (ADSL) modems in both the towfish and the processor.
The 2000-CSS towfish sub-bottom sonar operates over a frequency range of 0.5–12 kHz, has a 300-meter
depth rating and is designed primarily for coastal applications requiring greater bottom penetration. It is
hydro-dynamically stabilized and includes the sub-bottom transducer and four sub bottom hydrophone
arrays mounted under an acoustic baffle. This assembly, along with the connecting cable harnesses, is
contained inside a two-piece fiberglass shell which bolts together and includes tail fins and carrying
handles.
CAUTION! The carrying handles on the 2000-CSS towfish should not be
used for overhead lifting.
The port and starboard side scan transducers are mounted to the lower half of the shell. A teardrop cover
encloses the top of the sub bottom transducer and its transformer, and a hinged tow bridle provides the
mechanical connection for the tow cable. The electronics bottle is mounted to the upper half of the shell
aft of the teardrop cover.
A labeled image of the 2000-CSS towfish is shown in F
IGURE 1-2.
2000-CSS COMBINED SONAR 0017423_REV_C
Tow Bridle
Teardrop Cover
Upper Fiberglass
Shell
Lower Fiberglass
Shell
Carrying Handles (4)
Electronics Bottle
Tail Fins
Side Scan
Transducer
(one port, one
starboard)
Figure 1-2: Towfish Parts
1-6 1.0: OVERVIEW
1.2.4 Tow Cables
Both Kevlar reinforced and armored tow
cables are available separately, terminated at
both ends, or just at the towfish end. The tow
cables are used to connect to and tow the
towfish. A Kevlar reinforced tow cable is
shown F
single conductor and a shield. They also
include an MCIL6F female wet pluggable
connector on the towfish end. At the topside
end, the Kevlar reinforced tow cables include
an MCIL4M connector for connecting to the
STARMUX III. The armored tow cables include
either an MCIL4M male wet-pluggable
connector or an open termination for
connection to the slip rings of a winch. A cable
grip is also included for attaching the tow
cable to the tow bridle of the towfish.
IGURE 1-3. Both cable types include a
Figure 1-3: Kevlar Reinforced Tow Cable
1.3 Optional Equipment
Optional equipment that can be installed and used with a 2000-CSS system include the following:
• Magnetometer
• Pressure sensor
• Power loss pinger
• Responder
NOTE: The option connector provides 27 VDC @ 1 A maximum.
1.3.1 Magnetometer
A magnetometer can be user specified or supplied and is available from a number of manufacturers.
2000-CSS COMBINED SONAR 0017423_REV_C
1-7
1.3.2 Pressure Sensor
A pressure sensor can be installed in the towfish to provide towfish depth data. This type of pressure
sensor is designed for continuous use in a corrosive liquid environment and has a 500-psi pressure range.
1.3.3 Power Loss Pinger
A power loss pinger activates when towfish power is lost and the towfish is submerged. Should this event
occur, the pinger will continuously transmit an acoustic pulse which can be received by a pinger locator.
The pinger is fully self-contained in a stainless steel or aluminum housing and includes an internal battery.
1.3.4 Responder
The responder functions with an optional acoustic tracking system to provide towfish positioning. The
tracking system deck unit provides a trigger which is input to the topside computer, and the topside
computer outputs the trigger signal to the towfish by combining the signal with the downlink command
and uplink sonar data signals.
1.4 Full Spectrum Chirp Technology Overview
EdgeTech's Full Spectrum Chirp technology has several distinct advantages over conventional side scan
and sub-bottom profiling systems. These benefits include the use of separate sub-bottom acoustic
projectors and receivers to enable simultaneous transmission and reception of acoustic signals, high
signal-to-noise ratio (SNR) for improved side scan and sub-bottom imagery, high repeatability of the
transmitted signals from pulse to pulse for high signal definition, high resolution for measurement of fine
sediment layering and display of along track and across track imagery, reduction of side lobes for minimal
reception of undesired echoes, additional processing gain for energy efficiency, and a Gaussian shaped
amplitude spectrum of the outgoing pulse to preserve resolution and bandwidth with attenuation.
1.4.1 Separate Sub-Bottom Acoustic Projectors and Receivers
The side scan sonar uses a line array of piezoelectric elements to both transmit and receive the acoustic
signals, one on the port side of the towfish and one on the starboard side. The sub-bottom sonar uses
separate acoustic projectors and receivers. The projectors are wide band piston type transducers, and the
receivers are hydrophone arrays composed of lead zirconate titanate (PZT) crystals. The transducers are
mounted in the forward section of the towfish, and the hydrophone arrays are mounted aft. The use of
separate transmitting transducers and receiving hydrophone arrays preserves linearity and allows the
simultaneous transmission and reception of the acoustic signals. The transducers and hydrophone arrays
are mounted beneath acoustic baffles which minimize direct path, towfish and surface reflections.
1-8 1.0: OVERVIEW
1.4.2 High Signal-to-Noise Ratio
Full Spectrum Chirp technology does not use a conventional matched filter, the correlation filter that is
widely used to compress FM signals, to process wide band signals. Rather it uses proprietary amplitude
and phase weighting functions for the transmitted pulse and a pulse compression filter that maximizes
the SNR of the acoustic images over a wide band of operating frequencies. These functions provide a
significant SNR improvement in the imagery over other pulse and chirp side scan and sub-bottom sonars
with band limited components that are limited in dynamic range.
1.4.3 High Repeatability
The frequency range of operation is determined by the acoustic characteristics of the transmitter and
receiver mounted in the towed vehicle. For the side scan sonar, the transmit frequency is selected based
on the desired range and resolution required. For sub-bottom profiling, the frequency is selected based
on the sub-bottom conditions at the survey site and the type of sub-bottom features that need to be
imaged. The FM pulses are generated by a D/A converter with a wide dynamic range and a transmitter
with linear components. Therefore, the energy, amplitude, and phase characteristics of the acoustic
pulses can be precisely controlled. This precision produces high repeatability and signal definition.
1.4.4 High Resolution
Normally, when using long pulses, resolution is reduced. However, after correlation processing the
received signals, a very sharp wavelet is produced that has a duration equal to the inverse of the sweep
bandwidth. Therefore, the more bandwidth that is used, the sharper this pulse will become. Side scan and
sub-bottom signals received at the surface pass through a software controlled programmable gain
amplifier before being digitized with a 16-bit analog-to-digital (A/D) converter. The FM pulse is then
compressed using a digital compression filter. This correlation process is implemented in real time with
forward and inverse Fast Fourier Transforms (FFTs). The compressed pulse has a time duration
approximately equal to the inverse of the bandwidth of the FM pulse which results in high resolution
across track side scan sonar images and measurements of fine sediment layering in the sub-bottom
profiles, an important factor for sediment classification.
1.4.5 Reduction of Side Lobes
Use of Full Spectrum chirp technology reduces the side lobes in the effective transducer aperture,
enabling high along track resolution and high attenuation of unwanted echoes. The wide bandwidth of
the sweep frequency has the effect of smearing the side lobes of the transducer and thus achieving a
beam pattern with virtually no side lobes. The effective spatial beam width obtained after processing a
full spectrum 2–10 kHz sub bottom signal, for example is 20 degrees measured at the -3db points.
2000-CSS COMBINED SONAR 0017423_REV_C
1-9
1.4.6 Additional Processing Gain
In addition to the resolution improvement, correlation processing achieves a signal processing gain over
the background noise by using a broad bandwidth transmission pulse that sweeps out over a range of
frequencies instead of trying to operate with one very sharp acoustic peak pulse as is done with CW side
scan and sub-bottom sonar systems. This technique generates a lot of acoustic energy in the water that
results in a processing gain that is approximately ten times the log of the time bandwidth product. This
improvement is due to the signal having a time duration longer than the inverse of the bandwidth, thus
increasing the signal energy without increasing the power of the outgoing pulse. To equal the typical
performance of the full spectrum sonar pulse, conventional pulse side scan and sub-bottom sonars would
have to operate at a peak pulse power of 100 times greater than a full spectrum pulse.
1.4.7 Gaussian Shaped Amplitude Spectrum Outgoing Pulse
Another important feature of Full Spectrum Chirp technology is that the signal processing optimizes the
performance of the side scan and sub-bottom sonars. The sonars contain many components, each with a
unique dynamic range and linearity characteristic which are frequency dependent. In addition to this
characteristic, the amplitude spectrum of the outgoing pulse is chosen to be approximately Gaussian in
shape to limit the side lobe level and temporal resolution losses due to attenuation. As a wavelet with a
Gaussian shaped spectrum is attenuated by the sediment, energy is lost but its bandwidth is nearly
preserved. Therefore, even after being attenuated, the acoustic pulse has approximately the same
resolution as the outgoing pulse.
2-1
2.0: SPECIFICATIONS
The specifications for the EdgeTech 2000-CSS Side Scan and Sub-Bottom Profiling System include
electrical, mechanical, and environmental characteristics for the following components:
• Topside computer
• STARMUX III Digital Telemetry Link
• 2000-CSS Towfish
NOTE: All specifications are subject to change without notice.
2.1 Topside Computer
The specifications for the Topside Computer are shown in TABLE 2-1.
SPECIFICATION VALUE
17.8 cm (7 in.) high
Size:
Weight: 19.5 kg (43 lb)
Case type:
Case construction: Aluminum 19-inch rack mount
Case finish: Black power coat
Mounting:
43.2 cm (17 in.) wide
48.3 cm (19 in.) deep
EIA RS-310C 19-inch standard rackmount with fully-enclosed frame,
removable top access cover and heavy duty front handles
Standard 19-inch rack with provisions for mounting rack slides (not
provided)
Shipping container type: Sealed high impact polyurethane casea
81 cm (32 in) high
Shipping container size:
81 cm (32 in wide
8.1 cm (32 in) deepa
2-2 2.0: SPECIFICATIONS
Non-operating storage
relative humidity:
DVD/RW drive
500-GB hard drive (OS)
(2) Ethernet
SPECIFICATION VALUE
Shipping weight: 70 kg (155 lb)b
Operating Temperature: 0–45°C (32–113°F)
Storage temperature: -30–70°C (-22–158°F)
Operating relative humidity: 0–95% (non-condensing)
0–95% (non-condensing)
Input voltage: 90–260 VAC, 50/60 Hz, auto switching
Processor: Intel I7 6700 Quad Core 3.4GHz 8MB Cache
Memory: 8 GB DDR4 RAM
Data storage:
1-TB hard drive (data)
Operating system: Windows 7, 64 Bit
Application software: DISCOVER 2000-C and DISCOVER Sub-Bottom
Display: (2) 21-inch LCD monitor
Keyboard: High impact industrial
Pointing device: High impact industrial trackball
(6) RS-232
(4) USB 2.0
(4) USB 3.0
I/O ports:
(1) DVI
(4) MINI Display Port
Table 2-1: Topside Computer Specifications
a. Shipped in a sealed high impact polyurethane case with the 2000 Topside computer and the STARMUX III mounted
2000-CSS COMBINED SONAR 0017423_REV_C
inside a 19-inch rack enclosure with the keyboard, the trackball and one monitor. The rack enclosure size is 38.1
cm (15 in.) x 50.8 cm (20 in.) x 55.9 cm (22 in.)
b. Total shipping weight of the 2000 Topside computer and the STARMUX III mounted inside a 19-inch rack enclosure
5 VDC TTL positive or negative leading edge triggered, selectable in
DISCOVER
with the keyboard, the trackball and one monitor. Shipped in a sealed high impact polyurethane case. Rack
enclosure weight is 41 kg (90 lb).
2.2 STARMUX III Digital Telemetry Link
The specifications for the STARMUX III are shown in TABLE 2-2:
SPECIFICATION VALUE
8.3 cm (3.25 in) high
Size:
48.5 cm (19.0 in) wide
43.2 cm (17.0 in) deep
2-3
Weight: 6.4 kg (14 lb.)
Case Type: EIA RS-310C 19-inch rack mount
Case Construction: Aluminum 19-inch rack mount
Case Finish: Anodized
Mounting:
Standard 19-inch rack with provisions for mounting rack slides (not
provided)
Input Power: 90-260 VAC, 50/60 Hz, 1200 watts max, auto sensing
Power to Sub Bottom and
Side Scan Sonar:
375 VDC
External SYNC INPUT:
I/O Ports:
(1) Ethernet
(1) Sync
Table 2-2: STARMUX III Digital Telemetry Link Specifications
2-4 2.0: SPECIFICATIONS
6000 m (19,680 ft) Contact EdgeTech for cable type
vs. length.
2.3 2000-CSS Towfish
The specifications for the 2000-CSS Towfish is shown in TABLE 2-3.
GENERAL SPECIFICATIONS
SPECIFICATION
Size:
Weight in air: 235 kg (517 lb)
Weight in water: 88 kg (195 lb)
Construction: Fiberglass
Maximum tow cable length:
Depth rating: 300 m (984 ft)
Tow cable type: Coaxial
Maximum safe towing speed: 12 knots
Operating temperature: 0–45°C (32–113°F)
Storage temperature: -20–60°C (-4–140°F)
Heading accuracy: <1.5° RMS
VALUE
160.0 cm (63.0 in.) long
124.0 cm (48.8 in.) wide
47.0 cm (18.5 in.) high, incl. tail fin
Heading resolution: 0.1°
Pitch and roll accuracy: ±0.4°
Pitch and roll resolution: 0.1°
Pitch and roll repeatability: 0.2°
Optional sensor port: RS-232
2000-CSS COMBINED SONAR 0017423_REV_C
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