IMAGENEX 881A-GS User manual

881A-GS 10,000 m Imaging
445-096 JULY 2015-REVISED MAY 2017
Specifications subject to
IMAGENEX MODEL 881A-GS
10000 m GYRO STABILIZED
MULTI-FREQUENCY IMAGING SONAR
APPLICATIONS: FEATURES:
•ROV, AUV, & UUV •Serial Communications
•Manned Submersibles •Programmable (format available)
•Search & Recovery •Gyro stabilized transducer steering
•Borehole/cave work •Simple set-up and installation
•Drop sonar •Full scale range from 1 m to 200 m
•Scientific Research •Orientation module
•CHIRP Technology
Gyro-stabilization of the Imagenex Model 881A-GS makes the high resolution 881A
sonar into a system capable of crystal clear visualization of the ocean environment from moving
platforms, no longer compromised by the blurring effects of host vehicle rotation. An advanced,
low drift gyro is integrated directly into the sonar head, so the sonar can now compensate for
vehicle motion in real time with unprecedented accuracy, stability, and robustness.
The enhanced capabilities of the 881A-GS have not compromised the performance of the
881A sonar. On short range, this sonar scans using a 2 mm range resolution, and can auto-adjust
acoustic frequency and resolution to scan up to a 200 m radius, 360° surrounding area.
The Model 881A-GS still has low power, simple set-up, and small size that make it an
ideal tool for large work ROV’s and small inspection vehicles. On it’s own it is now an amazingly
simple drop sonar and borehole inspection package: just add a laptop computer and power
supply and run the included Imagenex software.
Copyright ©2015 - 2019
change without notice www.imagenex.com Imagenex Technology Corp.

HARDWARE
SPECIFICATIONS:
FREQUENCY 310 kHz, 675 kHz, or 1 MHz (standard default settings)
-Other frequencies can be selected through programmable
software configurations
(Tunable from 280 kHz to 1.1 MHz in 5 kHz steps)
TRANSDUCER Imaging type, fluid compensated
TRANSDUCER BEAM WIDTH 310 kHz: 4°x 40°
675 kHz: 1.8°x 20°
1 MHz: 0.9°x 10°
RANGE RESOLUTION 1 m – 4 m: 2 mm (0.08”)
5 m & up: 10 mm (0.4”)
ORIENTATION MODULE (accuracies):
PITCH & ROLL ± 0.1° typical
HEADING (Magnetic) ± 1.0° typical
MIN. DETECTABLE RANGE 150 mm (6”)
MAX. OPERATING DEPTH 10000 m
MAX. CABLE LENGTH 1000 m on typical twisted shielded pair (RS-485)
INTERFACE RS-485 serial interface @ 115.2 kbps (or optional RS-232)
CONNECTOR End mounted, four conductor, wet mateable
(Subconn BH4M-Ti)
POWER SUPPLY 20 – 36 VDC at less than 7 Watts
DIMENSIONS (for both depths) 101.6 mm (4”) diameter x 382.1 mm (15.04”) length
WEIGHT: In Air
In Water
~ 8 kg (~ 17 lbs)
~ 5.5 kg (~ 12 lbs)
MATERIALS Titanium & Polyurethane
FINISH None
881A-GS 10000 m 2
445-096 www.imagenex.com

SOFTWARE
SPECIFICATIONS: Win881AL.exe
WINDOWS™OPERATING SYSTEM Windows™XP, Vista, 7, 8, 10
MODES Sector, Polar and Side Scan
GYRO MODES North Up, Heading Up, Target Steering
RANGE SCALES 1 m, 2 m, 3 m, 4 m, 5 m, 10 m, 20 m, 30 m, 40 m,
50 m, 60 m, 80 m, 100 m, 150 m, 200 m
TRAIN ANGLES Continuous rotation, 3°increments
SECTOR SIZE:
SECTOR MODE
POLAR MODE
0°– 180°, 3°increments
0°– 357°, 3°increments, or Continuous rotation
STEP SIZES Slow (0.3°), Medium (0.6°), Fast (0.9°), Faster (1.2°),
Fastest (2.4°)
GRID TYPES Polar and rectangular
FILE FORMAT (filename).81R
RECOMMENDED
MINIMUM COMPUTER
REQUIREMENTS:
2 GHz Pentium 4
256 MB RAM
20 GB Hard Disk
1024 x 768 Screen Resolution
ORDERING
INFORMATION:
10000 m UNIT Standard 881-000-403
RS-232 Option -006
Gyro Stabilization Option -048
Product and company names listed are trademarks or trade names of their respective companies.
881A-GS 10000 m 3
445-096 www.imagenex.com

15.04 1.97
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3.49 3.39
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PRELIMINARY
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THE INFORMATION CONTAINED IN THIS
DRAWING IS THE SOLE PROPERTY OF
IMAGENEX TECHNOLOGY CORP. ANY
REPRODUCTION IN PART OR AS A WHOLE
WITHOUT THE WRITTEN PERMISSION OF
IMAGENEX TECHNOLOGY CORP. IS
PROHIBITED.
PROPRIETARY AND CONFIDENTIAL
NEXT ASSY
USED ON
APPLICATION
DIMENSIONS ARE IN INCHES
TOLERANCES:
FRACTIONAL
ANGULAR: MACH BEND
TWO PLACE DECIMAL
THREE PLACE DECIMAL
INTERPRET GEOMETRIC
TOLERANCING PER:
MATERIAL
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ENG APPR.
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Q.A.
COMMENTS:
DATE
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TITLE:
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SCALE: 1:3
UNLESS OTHERWISE SPECIFIED:
NEW
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PRELIMINARY
03MAR15
10,000m
881A GS IMAGER
SHEET 1 OF 1
400-110
DO NOT SCALE DRAWING

IMAGENEX TECHNOLOGY CORP.
Model 881A-GS
Gyro Stabili ed Scanning Sonar
(Serial Version)
Quick Start
Number 430 - 031
Revision Date Description
00 May 6, 2014 Release
01 January 22, 2015 Software update
02 July 6, 2015 Updated Gyro cal brat on descr pt on
Spec f cat ons subject to change w thout not ce

Table of Contents
1.0 Introduction.....................................................................................................................................................................................................................................1
2.0 Getting Started:...............................................................................................................................................................................................................................1
2.1 Step-By-Step Start Up Gu de.....................................................................................................................................................................................................1
2.2 Gyro Cal brat on.........................................................................................................................................................................................................................2
2.2.1 Automat c Gyro Cal brat on.............................................................................................................................................................................................2
2.2.2 Manual Gyro Cal brat on.................................................................................................................................................................................................2
2.3 Overv ew....................................................................................................................................................................................................................................3
2.4 Hardware....................................................................................................................................................................................................................................5
2.5 Software.....................................................................................................................................................................................................................................6
2.5.1 Acqu re Target..................................................................................................................................................................................................................8
2.5.2 Lat tude Adjustment and Compass Decl nat on.............................................................................................................................................................11
2.5.3 F le S ze L m ts..............................................................................................................................................................................................................11
Appendix A – USB Converters and the Windows OS......................................................................................................................................................................12
A.1 - V rtual Commun cat on Ports................................................................................................................................................................................................12
A.2 - Common W ndows© Issues related to all USB <--> Ser al Converters................................................................................................................................13
A.3 - Determ n ng the Ass gned Com Port For All USB <--> Ser al Converters..........................................................................................................................14
Table of Figures
F gure 2.1: Unstab l zed Image...............................................................................................................................................................................................................3
F gure 2.2: Stab l zed Image...................................................................................................................................................................................................................4
F gure 2.3: 881A-GS...............................................................................................................................................................................................................................5
F gure 2.4: Opt ons Menu.......................................................................................................................................................................................................................6
F gure 2.5: Standard 881A-GS D splay..................................................................................................................................................................................................7
F gure 2.6: Acqu re Target button has been selected...............................................................................................................................................................................9
F gure 2.7: Target has been selected......................................................................................................................................................................................................10
F gure 2.8: Auto F le S zes....................................................................................................................................................................................................................11
F gure A.1: Overv ew of USB Data Converter Log c Flow..................................................................................................................................................................12
F gure A.2: System Propert es...............................................................................................................................................................................................................14
F gure A.3: System Propert es - Select Hardware Tab..........................................................................................................................................................................14
F gure A.4: Dev ce Manager – Select Ports and double cl ck dev ce...................................................................................................................................................14
F gure A.5: Port Propert es – Select “Port Sett ngs”.............................................................................................................................................................................14
F gure A.6: Creat ng a Dev ce Manager Shortcut.................................................................................................................................................................................15
Index of Tables
Table 2.1: Opt on Menu...........................................................................................................................................................................................................................6
Table 2.2: Ma n D splay..........................................................................................................................................................................................................................8
Table A.1: W ndows Com Port Ass gnment Scheme............................................................................................................................................................................13

Model 881A-GS Setup Gu de 1.0 Introduct on
1.0 Introduction
The Model 881A-GS s an advanced gyro-stab l zed, h gh-resolut on scann ng sonar system that has been des gned to prov de s mple,
rel able, and accurate representat on of underwater mages.
2.0 Getting Started:
The 881A-GS was des gned to be user fr endly and s mple to set up n the f eld. It s generally recommended however to perform a
prel m nary setup before head ng out nto the f eld.
2.1 Step-By-Step Start Up Guide
1. Phys cally mount the sonar referr ng to Section 2.4 on page 5 for deta ls.
2. Ensure 24VDC@ 1A m n mum power supply s off
3. Referr ng to Appendix A – USB Converters and the Windows OS, conf gure any necessary adaptors.
4. Connect the cable's DB9 connector to the PC’s ser al port.
5. Plug the underwater connector to the sonar.
6. Deploy to stable, flat locat on
7. Power up the 881A-GS.
8. Wa t for gyro cal brat on to complete. The sonar, upon power up, w ll cal brate the motor, delay for 10 seconds and
automat cally perform a gyro cal brat on. No commun cat on to the gyro sub system s ava lable at th s t me.
9. Ver fy the “Local Latitude” sett ng n the “. n ” f le and adjust f necessary. Refer to Section 2.5.2 on page 11 for deta ls
10. Launch the “Win881AL.exe” program
If f le playback s des red, use the menu command “File->Open File to Playback”.
If real-t me operat on s des red, use the menu command “File->Connect to Sonar Head”.
11. Proceed to Section 2.5 on page 6 for software nstruct ons.
Document Number: 430-030-02 Page 1 of 15

Model 881A-GS Setup Gu de 2.2 Gyro Cal brat on
2.2 Gyro Calibration
All gyros are sens t ve to the env ronment ( .e. temperature, mot on, Earth's rotat on, etc.) and w ll naturally dr ft w th t me. Therefore,
from t me to t me, t s recommended to ssue a gyro cal brat on ( n manual mode) or recal brate the motor (auto mode) to remove the
accumulated dr ft.
2.2.1 Automatic Gyro Calibration
Imagenex Gyro enabled scann ng sonars now ncorporate an automat c gyro b as ng feature wh ch s selectable n the user program.
Th s mode cont nuously re-b as's the gyro n real t me accommodat ng for temperature fluctuat ons and nternal dr ft. Refer to Table
2.1 on page 6 for deta ls on enabl ng / d sabl ng th s mode. When f rst start ng the sonar, the b as adjustment w ll be very rap d as the
temperature stab l zes. Wh le the gyro w ll st ll nternally dr ft, the sonar mage w ll be coherent, allow ng the operator to cont nue to
work. Note that the absolute head ng w ll not be exact dur ng th s t me as the sonar does not d fferent ate between nduced dr ft and
real movement. After a few m nutes, re-cal brate the motor to real gn the sonar and the transducer. Th s w ll reset the accumulated dr ft
that occurred dur ng the warmup per od. It s recommended to per od cally re- ssue the cal brate motor command to reset the
accumulated dr ft.
2.2.2 Manual Gyro Calibration
The nformat on below descr bes the manual b as ng mode wh ch may be necessary n strong magnet c f eld env ronments.
Do not cal brate the gyro unt l the nternal temperature of the sonar has stab l zed, approx mately 30-60m nutes underwater.
1. Mount sonar on a level, stable surface, or settle the ROV on a flat bottom.
2. Under the “Options” Menu, select “Calibrate yro”.
3. Standard sonar operat on s suspended dur ng gyro cal brat on.
4. The message “Calibrating yro” w ll appear. Cal brat on takes approx mately 30secs.
5. Once the message d sappears, standard operat on commences.
When us ng MANUAL b as ng, It s ESSENTIAL that the sonar s completely stat onary and at constant temperature
dur ng gyro cal brat on. ANY movement w ll cause undes rable dr ft n the gyro.
Document Number: 430-030-02 Page 2 of 15

Model 881A-GS Setup Gu de 2.3 Overv ew
2.3 Overview
Wh le trad t onal scann ng sonars prov de excellent magery, they have a s gn f cant short com ng...they rely on the sonar be ng
perfectly st ll dur ng data acqu s t on. Imagenex has developed the deal solut on...the 881A-GS. F gure 2.1, below, shows a non
stab l zed mage taken wh le the sonar was sp nn ng. Note the wavy l nes n the lower 2 quadrants. Now refer to the same area scanned
w th Gyro stab l zat on enabled (F gure 2.2, below). Now the mage s well def ned and stra ght.
Document Number: 430-030-02 Page 3 of 15
Figure 2.1: Unstabilized Image

Model 881A-GS Setup Gu de 2.3 Overv ew
Document Number: 430-030-02 Page 4 of 15
Figure 2.2: Stabilized Image

Model 881A-GS Setup Gu de 2.4 Hardware
2. Hardware
Figure 2.3: 881A- S
F gure 2.3, above, nd cates the 881A-GS n the “Transducer Up” or entat on.
Transducer End. FRAGILE. Th s area MUST be exposed to the water w th no obstruct on. Do not mount sonar us ng th s
area.
Connect sonar cable. Ensure lock ng sleeve s used. Do not bend p ns.
O l f ll ng port. Do not remove. Transducer “zero” pos t on (Transducer Pos t on = 600)
Electron cs Bottle. Use th s area for mount ng the sonar.
Document Number: 430-030-02 Page 5 of 15
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Model 881A-GS Setup Gu de 2.5 Software
2.5 Software
After nstall ng the “Win881AL.exe” program (generally “C:\Program Files (x86)\Imagenex”), load the program by double-cl ck ng
on ts con.
The program, wh ch supports the 881A, 881L, 881A-GS, and 881L-GS w ll need to be told wh ch sonar type s be ng connected.
Choose 881A-GS from:
“System => Sonar Type => 881A- S”
Th s conf gures the program to operate n 881A-GS mode.
Figure 2.4: Options Menu
Ref Item Description
1 Enable Gyro Enables Gyro Stab l zed Image. Deselect to operate as standard 881A.
2 Cal brate Gyro Cal brates gyro to compensate for dr ft.
3 Enable Gyro Auto B as Enabl ng th s puts the sonar nto auto b as mode where the sonar w ll
cont nuously re-b as the gyro n real t me. D sabl ng th s mode requ res
a manual b as as descr bed n Sect on 2.2.2 on page 2.
4 Cal brate Compass F eld Cal brates the nternal Compass. To cal brate the compass, the
sonar head MUST be rotated 360º (d rect on s rrelevant). Check
“Cal brate Compass”, rotate 360º, then un-check “Cal brate Compass”
to store the sett ngs.
5 Cal brate Motor Cal brates Motor and real gns the sonar head pos t on relat ve to the
transducer pos t on.
Table 2.1: Option Menu
Document Number: 430-030-02 Page 6 of 15

Model 881A-GS Setup Gu de 2.5 Software
Figure 2.5: Standard 881A- S Display
Document Number: 430-030-02 Page 7 of 15
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Model 881A-GS Setup Gu de 2.5 Software
Ref Item Descr pt on
1 Range / Frequency D splay D splay current acoust c range and frequency of sonar n yellow.
D splays Gr d scale and current ga n n orange
2 Gyro stab l zed operat ng mode D splays only when Gyro Stab l zed Image s enabled. One of: North
Up, Head ng Up, or Target Steer ng.
3 F le Record ng nformat on D splays “Not Record ng” or “Record ng...”
4 Commun cat on Error Status D splays “No Connect on” when commun cat on to the sonar s
nterrupted.
5 Qu ck Sett ng Qu ck Sett ng for sonar range and ga n
6 W per Current transducer pos t on for the “p ng”
7 Sonar Pos t on Ind cator The yellow c rcle nd cates the current sonar pos t on ndependent of the
transducer pos t on.
In North Up mode, the c rcle w ll transverse around the per meter of the
sonar mage wh ch rema ns stat onary n a North up or entat on.
In Head ng Up mode, the c rcle w ll rema n stat onary at the top of the
screen, wh le the sonar mage rotates.
In Target Steer ng mode, the c rcle w ll transverse around the per meter
of the sonar mage wh ch rema ns stat onary
8 Gyro Stab l zed Image mode select on Selects the var ous modes of d splay.
In North Up mode, the c rcle w ll transverse around the per meter of the
sonar mage wh ch rema ns stat onary n a North up or entat on.
In Head ng Up mode, the c rcle w ll rema n stat onary at the top of the
screen, wh le the sonar mage rotates accord ng to the head ng.
In Target Steer ng mode, the c rcle w ll transverse around the per meter
of the sonar mage wh ch rema ns stat onary
9 Acqu re Target Only act ve n “Target Steer ng mode, “Acqu re Target” allow the user
to select a target locat on. The sector w ll then be centred on the
selected target and rotated to place the target at the top of the d splay.
See Sect on 2.5.1, below for deta ls.
Table 2.2: Main Display
2.5.1 Acquire Target
The 881A-GS has the ab l ty to select a target of nterest, and automat cally centre and scan that target on screen. The procedure s as
follows.
1. Ensure the gyro s enabled and n “Target Steer ng” mode. The image will perform a full polar scan.
2. Select the button “Acqu re Target”. The mouse cursor will change to
3. Select des red target on screen The screen will automatically change to a top sector view with
the target centred within the sector
Th s s descr bed further below.
Document Number: 430-030-02 Page 8 of 15

Model 881A-GS Setup Gu de 2.5.1 Acqu re Target
In F gure 2.6, above, the “Acqu re Target” was selected and the mouse cursor changed to . In th s example, the target of
nterest s pos t oned under the target cursor.
Document Number: 430-030-02 Page 9 of 15
Figure 2.6: Acquire Target button has been selected
Selection Cursor

Model 881A-GS Setup Gu de 2.5.1 Acqu re Target
In F gure 2.7, above, the des red target from F gure 2.6 was selected. The screen automat cally centred the target w th n a sector and
rotated the sector to the top of the screen. The sonar w ll now scan the sector w th the centred target.
To return, select “Release Target” to remove the sector restr ct ons and tra n angle.
Document Number: 430-030-02 Page 10 of 15
Figure 2.7: Target has been selected

Model 881A-GS Setup Gu de 2.5.2 Lat tude Adjustment and Compass Decl nat on
2.5.2 Latitude Adjustment and Compass Declination
The geograph cal local lat tude compensates for dr ft caused by the Earth's rotat on. To set the lat tude of the current locat on, open the
f le “Win881AL.ini” n a text ed tor and ed t the l nes:
•Local Lat tude=49.250000 → (0 to 90 for northern lat tudes, 0 to -90 for southern lat tudes)
•CompassDecl nat on=16.5 → (±180º, offset to Magnet c North. West s negat ve, East s pos t ve).
To match the approx mate locat on of the sonar.
Once these are set, run the “Win881AL.exe” program as per usual.
The “Local Lat tude” w ll not take effect unt l a “CALIBRATE GYRO” command s n t ated
manually under the “Options” menu.
The compass decl nat on angle s used for d splay ng the sonar mage referenced to True North rather than Magnet c North.
The default values are for Vancouver, BC, Canada wh ch has a lat tude of 49.25º North and a magnet c compass decl nat on of 16.5º
East (as of 2014).
2.5.3 File Size Limits
Stor ng v deo can generate very large f les, The software s able to automat cally spl t the recorded f le n predef ned f le s zes as
shown below n F gure 2.8
Figure 2.8: Auto File Sizes
In order to re-jo n two spl t f les, from the command prompt type:
copy /b “Source1.81R”+”Source2.81R” “dest.81R”
w thout the quotes.
Document Number: 430-030-02 Page 11 of 15

Model 881A-GS Setup Gu de Append x A – USB Converters and the W ndows OS
Appendix A – USB Converters and the Windows OS
W th the prol ferat on of the “Universal Serial Bus” (USB) compat ble dev ces ava lable for notebook and desktop computers,
manufacturers are rap dly om tt ng phys cal ser al ports on the r products n order to cut product on costs. The USB bus s
extremely versat le as there are are no Com Port confl cts, no IRQ's to deal w th, and has support for up to 256 dev ces on one bus
(wh le there are usually mult ple USB ports on a computer, there are usually only two phys cal USB buses).
W th all that s go ng for t, one would wonder why use ser al dev ces at all. Good quest on. Major factors n reta n ng a true
phys cal ser al dev ce are:
●Cable length – USB has a max mum cable length support of 5m (~16')
●Latency – USB s a packet dr ven technology and as such delays occur due to USB dr ver packag ng schemes.
A.1 - Virtual Communication Ports
To get a ser al dev ce (RS-232 or RS-485) connected to a computer that only has USB ports, a converter needs to be nstalled n-
l ne between the USB port and the ser al dev ce. These converters nstall a spec al dr ver n W ndows called a “V rtual Com Port”
Th s software w ll emulate a ser al port so that ser al enabled software can s mply “see” the USB port as a ser al port. See the
f gure below for an overv ew.
One caveat s that W ndows can get confused f a dev ce s plugged nto a USB port wh le there s data be ng transm tted through
t. W ndows th nks that the dev ce s a "pen mouse" and the mouse cursor w ll behave errat cally. If th s happens, the computer
w ll need to be restarted. To c rcumvent th s phenomena, DO NOT connect GPS, or other dev ces to the USB convertor unt l the
convertor s fully funct onal ( .e. plug the converter nto the computer and wa t unt l W ndows sets t up and ass gns t a Com Port
number BEFORE plugg ng a ser al dev ce nto the converter).
Generally, once a converter s correctly nstalled, W ndows w ll ass gn a Com Port number to A PARTICULAR dev ce on A
PARTICULAR USB port. Once th s s done, th ngs run pretty smoothly....unt l the operator changes someth ng....
Document Number: 430-30-02 Page 12 of 15
Figure A.1: Overview of USB Data Converter Logic Flow
RS-232
Sonar ComX
Physical Data
Converter
Virtual Com
Port Driver
RS-485 Serial
USB
USB
ComX
Sonar
Pro ram
Computer runnin Windows OS
Physical Interfaces

Model 881A-GS Setup Gu de Append x A – USB Converters and the W ndows OS
A.2 - Common Windows© Issues related to all USB <--> Serial Converters
W ndows XP w ll ass gn a Com Port number to a USB dev ce when t s f rst nstalled n the system. However, t w ll ass gn a
DIFFERENT Com Port number to the same dev ce when t s plugged nto a DIFFERENT USB port on the same computer. To
further compl cate matters, W ndows XP w ll ass gn a DIFFERENT Com Port number to a DIFFERENT dev ce when t s
plugged nto the SAME USB port on the same computer.
The table above nd cates a poss ble scenar o where var ous converters are plugged nto var ous USB ports. The ass gned Com
Port numbers above are only for llustrat on purposes. W ndows w ll actually ass gn the dev ce the next ava lable Com number.
For example, If you f rst plug the dev ce nto the BACK USB port of the laptop, W ndows w ll ass gn t a Com Port number of
(for arguments sake) '4' When you start the SportScan software, you set the Com Port to '4', and t runs f ne. The next t me you
use the dev ce, you plug the same dev ce nto the SIDE USB port on the laptop. W ndows w ll then ass gn the dev ce a Com Port
number of (aga n, for arguments sake) '5'. Now when you start the SportScan software, t cannot open, or f nd, Com Port '4' as the
dev ce s now set to Com Port '5'. You set the Com Port n SportScan to '5' and t aga n runs f ne.
There s no solut on for th s behav our. It s a W ndows funct on, and we have no control how the Com Ports are ass gned to a
dev ce.
Our suggest on s to only use the same USB port for each dev ce. For example, only use the BACK USB port for the dev ce to run
the sonar, and to only use the SIDE USB port for the dev ce used for GPS nput.
Also, f a d fferent ser al dev ce s plugged nto the same USB port, W ndows w ll ass gn t a d fferent Com Port aga n. For
example, f Com Ports '4' and '5' are already taken, W ndows w ll ass gn t Com Port '6'.
To make a long story short. W ndows ass gns a s ngle Com Port to a spec f c ser al dev ce plugged nto a spec f c USB port. If
e ther changes, W ndows w ll ass gn t a d fferent Com Port.
The above only appl es to convertors that have a un que ser al number.
Document Number: 430-30-02 Page 13 of 15
Table A.1: Windows Com Port Assignment
Scheme
Converter USB Port
A A 4
A B 5
A A 4
B A 5
Assigned
Com Port

Model 881A-GS Setup Gu de Append x A – USB Converters and the W ndows OS
A.3 - Determining the Assigned Com Port For All USB <--> Serial Converters
Th s sect on descr bes var ous procedures for determ n ng the ass gned Com Port of a converter. Th s document assumes the
W ndows XP Pro operat ng system and other computers may appear d fferently. However, the procedures w ll be s m lar
regardless of the W ndows vers on.
To access the Dev ce Manager from the Desktop:
●R ght cl ck on “My Computer”
●Left cl ck “Propert es”
Follow the follow ng Illustrat ons to Set the Com Port Number of the Dev ce. Note these Illustrat ons are for the ATEN UC-232A
Dev ce. The procedure for the Sealevel 2104 s the same. Also, Ignore the baud rate sett ngs. Imagenex software automat cally
opens the port at the correct parameters.
Figure A.2: System Properties
Figure A.3: System Properties - Select
Hardware Tab
Figure A.4: Device Manager – Select
Ports and double click device
Figure A.5: Port Properties – Select
“Port Settings”
Document Number: 430-30-02 Page 14 of 15