Fujikura AFL Telecommunications NOYES TURBOTEST 500B User manual


© 2002-2009, AFL Telecommunications, all rights reserved. T50B-00-1000 Revision F, 2009-08-04
Specifications are subject to change without notice.
(For software version 4.1 or higher)
TURBOTEST 500B
Insertion Loss and Return Loss
Test Set
User’s Guide

Limited Warranty
One Year Limited Warranty
All Noyes products are warranted against defective material and workmanship for a period of one year
from the date of shipment to the original customer. Any product found to be defective within the warranty
period will be repaired or replaced by Noyes. In no case will Noyes liabilities exceed the original purchase
price of the product.
Exclusions
The warranty on your equipment shall not apply to defects resulting from the following:
• Unauthorizedrepairormodication
• Misuse,negligence,oraccident
CE Information
These instruments have been designed and tested to comply with the relevant sections
of any applicable specifications including full compliance with all essential requirements
ofallapplicableEUDirectives.
Returning Equipment
To return equipment, please contact Noyes to obtain additional information and a Service Request
(S.R.) number. To allow us to serve you more efficiently, please include a brief description specifying
the reasons for the return of the equipment.
AFL Telecommunications
Noyes Test & Inspection
16 Eastgate Park Road
Belmont, NH 03220
Tel: 800-321-5298
603-528-7780
Fax: 603-528-2025

i
Table of Contents
Table of Contents
Safety Information
Important Safety Information .............................................................................v
Section 1: General Information
Contacting Noyes Customer Service ..................................................................1
UnpackingandInspection..................................................................................1
Feature Overview..............................................................................................2
Recommended Accessories...............................................................................2
Section 2: Functional Description
TURBOTEST500BPorts...................................................................................4
Front Panel Features .........................................................................................5
Section 3: Common Functions
MainMenuConguration ..................................................................................6
SelectingTestMode..........................................................................................7
FileManagement ..............................................................................................8
FileMenuConguration.................................................................................8
Creating a New File and Setting Test Identification Parameters ........................9
ChangingtheDefaultFilename..................................................................9
Setting the [START FIBER] Parameter ........................................................10
Setting the [LOCATION] Parameter.............................................................11
Setting the [TECHNICIAN] Parameter .........................................................12
Setting the [JOB] Parameter ......................................................................13
Adding Notes ............................................................................................14
Opening Saved Files......................................................................................15
Editing Test Identification Parameters.............................................................15
DeletingFiles ................................................................................................15
Viewing Statistics..........................................................................................17
OtherFunctionsMenu.......................................................................................18
OtherFunctionsMenuConguration ..............................................................18
Power Adjustment.........................................................................................19
Turning Lasers On/Off and Generating a Tone Signal...................................19
Adjusting Continuous Wave - CW Signal .....................................................20
Setting Limits................................................................................................20
General Setup...............................................................................................21
Setting Contrast ........................................................................................21
SettingTimeandDate ...............................................................................21
Enabling Sound, Power Save, and Limits.....................................................21

ii
TURBOTEST 500B User’s Guide
Section 4: Turbo Mode - Measuring Insertion & Return Loss
ScreensandMenus ..........................................................................................22
Selecting a Test Wavelength..............................................................................23
Setting References............................................................................................24
OLTS - Insertion Loss Reference ....................................................................24
SELF Referencing......................................................................................25
MUTUALReferencing ................................................................................26
ORL - Return Loss Reference.........................................................................27
Step I: 14.6 dB Referencing - setting the upper ORL limit ............................27
StepII:MandrelWrapReferencing-settingthelowerORLlimit...................27
PerformingaTURBOTest..................................................................................29
ReviewingSavedTURBOTestResults ................................................................31
Section 5: ORL Mode - Measuring Optical Return Loss
ScreensandMenus ..........................................................................................32
Setting References............................................................................................33
ORL - Return Loss Reference.........................................................................34
Step I: 14.6 dB Referencing - setting the upper ORL limit ............................34
StepII:MandrelWrapReferencing-settingthelowerORLlimit...................35
Performing a Connector Test .............................................................................36
Performing a Link Test ......................................................................................37
Reviewing Saved ORL Test Results.....................................................................38
Auto Retest...................................................................................................39
Section 6: OLTS Mode - Measuring Insertion Loss
ScreensandMenus ..........................................................................................40
Setting References............................................................................................41
OLTS - Insertion Loss Reference ....................................................................42
SELF Referencing......................................................................................42
MUTUALReferencing ................................................................................43
Performing a Link Test ......................................................................................44
Reviewing Saved OLTS Test Results...................................................................46
Section 7: Testing with the TURBOTEST 500B, OPM, and OLS
PowerMeterReferenceSetup ...........................................................................48
TURBOTEST500BReferenceSetup ..................................................................49
Performing a Link Test ......................................................................................51
Section 8: OPM Mode
ScreensandMenus ..........................................................................................53
Setting References............................................................................................54
MeasuringOpticalPower...................................................................................54

iii
ReviewingSavedOPMTestResults....................................................................55
Auto Retest...................................................................................................56
UsingtheTURBOTEST500BwithOpticalFiberIdentiers ..................................57
Tone Setup ...................................................................................................57
Section 9: Talk Option
ScreensandMenus ..........................................................................................58
Talk Setup ........................................................................................................59
Section 10: Troubleshooting and Maintenance
BatteryMaintenance.........................................................................................62
Battery Replacement ....................................................................................62
Battery Recharging .......................................................................................62
Battery Indicator Lights..................................................................................62
Cleaning Optical Ports.......................................................................................63
Cleaning Voice and Test Ports........................................................................63
CleaningOPMPort........................................................................................64
TURBOTEST500BMessages............................................................................65
Solving Test, Print and Software Problems..........................................................65
Section 11: Specifications
TURBOTEST500Bspecications ......................................................................67
RS-232PinDesignations..................................................................................68
Appendix A: Return Loss of Fiber Link with Open End vs. Terminated End ...........69
List of Figures
Figure2-1.TURBOTEST500BPorts.................................................................4
Figure2-2.TheTURBOTEST500BFrontPanel..................................................5
Figure3-1.MainMenuConguration. ...............................................................6
Figure3-2.FileMenuConguration..................................................................8
Figure3-3.OtherFunctionsMenuConguration. ..............................................18
Figure 3-4. Laser Adjustment Setup..................................................................19
Figure4-1.TURBOModeScreensandMenus...................................................22
Figure 4-2. Self Referencing.............................................................................25
Figure4-3.MutualReferencing. .......................................................................26
Figure4-4.MandrelWrapReferencing..............................................................28
Figure4-5.PerformingaTURBOTest. ..............................................................29
Figure 4-6. Reviewing Test Results. ...................................................................30
Figure 4-7. Reviewing Saved Test Results..........................................................31

iv
TURBOTEST 500B User’s Guide
Figure5-1.ORLModeScreensandMenus. ......................................................32
Figure5-2.MandrelWrapReferencing..............................................................35
Figure 5-3. Testing a Connector........................................................................36
Figure 5-4. Link Test Setup. .............................................................................37
Figure 5-5. Reviewing Saved ORL Test Results..................................................38
Figure 5-6. ORL Auto Retest. ...........................................................................39
Figure6-1.OLTSModeScreensandMenus.....................................................40
Figure 6-2. Self Referencing.............................................................................42
Figure6-3.MutualReferencing. ........................................................................43
Figure 6-4. Link Test Setup. .............................................................................44
Figure 6-5. Reviewing Saved OLTS Test Results. ...............................................46
Figure7-1.OPMReferenceSetup. ....................................................................48
Figure7-2.TURBOTEST500BReferenceSetup. ...............................................50
Figure 7-3. Link Test Setup...............................................................................51
Figure8-1.OPMModeScreensandMenus. .....................................................53
Figure8-2.TheOPMTestModeScreen.............................................................54
Figure 8-3. Reviewing Saved Test Results. ........................................................55
Figure8-4.OPMAutoRetest............................................................................56
Figure 8-5. Fiber Identification Setup. ...............................................................57
Figure9-1.TalkModeScreensandMenus........................................................58
Figure 9-2. Talk Setup......................................................................................59
Figure 10-1. Cleaning Optical Ports...................................................................63
Return loss of fiber span with open end vs. terminated end .................................69

v
Safety Information
Important Safety Information
WARNING!Useofcontrolsoradjustmentsotherthanthosespeciedhereinmayresultin
hazardousradiationexposure.
TheTURBOTEST500BisaCLASS I LASER PRODUCT.
WARNING ! UseonlythespeciedACadapter.UseofanothertypeofACadaptercandamage
the instrument and create the danger of fire and electrical shock.
WARNING! To avoid the danger of fire and electrical shock:
• NeveruseavoltagethatisdifferentfromthatforwhichtheACadapterisrated.
• Donotplugtheunitintoapoweroutletthatissharedbyotherdevices.
• Nevermodifythepowercordorexcessivelybend,twist,orpullit.
• Donotallowthepowercordtobecomedamaged.Donotplaceheavyobjectson
the power cord or expose it to heat.
• NevertouchtheACadapterwhileyourhandsarewet.
• Shouldthepowercordbecomeseriouslydamaged(internalwiringexposedorshorted),
contact the manufacturer to request servicing.
CAUTION! To avoid serious eye injury, never look directly into the optical outputs of fiber
optic network equipment, test equipment, patch cords, or test jumpers. Always assume that
optical outputs are on.
NOTICE! The TURBOTEST 500B contains no user serviceable parts. The unit must be
returnedtoNoyesorauthorizedagentsforrepairandcalibration.
IMPORTANT! Proper care in handling should be taken when using any precision optical test
equipmentsuchastheTURBOTEST500B.Scratchedorcontaminatedopticalconnectors
can impact the performance of the instrument. It is important to keep the dust caps in place
when the unit is not being used.
IMPORTANT!DonotchargetheLi-Ionbatterypackatatemperatureabove+45°C.
!
!
!
!
!

vi
TURBOTEST 500B User’s Guide

1
Section 1
Section 1: General Information
ThankyouforpurchasingaNoyesTURBOTEST500BOpticalLossTestSet.Thisinstrumenthasbeen
designed specifically for testing high fiber count cable commonly found in Telco or Broadband systems.
ThepurposeofthisUser’sGuideistoexplainhowtouseandmaintainthisinstrument.Pleasecheckour
web site at www.AFLtele.com/go/Noyes for updates to this manual, software updates, and additional
applicationinformation.IfyouhaveanyquestionsabouttheTURBOTEST500Bandrecommended
accessories, or if you need technical or sales support, please contact Noyes Customer Service.
Contacting Noyes Customer Service
YoumaycallNoyesCustomerServicebetween8a.m.and5p.m.,UnitedStatesEasternTime,as
follows:
Tel: 800-321-5298 (North America)
603-528-7780
Fax: 603-528-2025
E-mail: NoyesTechSupport@AFLtele.com
Unpacking and Inspection
This instrument has been carefully packed in accordance with standard shipping procedures. Examine
the equipment for damage that may have occurred during shipment. If you find any damage, or if any of
thefollowingitemsarenotincluded,pleasecontactNoyes.IftheTURBOTEST500Bisequippedwith
the talk option, then a headset will also be included.
TheTURBOTEST500Bpackageincludes:
• TURBOTEST500Binstrument
• PCSoftwareandManual
• ACAdapter/Charger
• RS-232SerialCable
• APC/UPCOpticalReferenceCable
• AdapterCap
• Mandrel
• HexScrewdriver
• User’sGuide
• CarryCase

2
TURBOTEST 500B User’s Guide
Feature Overview
High-speed transmission systems employ laser sources with narrow bandwidths, which are sensitive to
back-reflections caused by components, splices, and connectors. If too much light is reflected back to
the laser transmitter, the modulation characteristics and spectrum of the laser may change. This change
will degrade the systems performance. For efficient operation of the laser transmitter, it is necessary
to test for optical return loss caused by back-reflections.
Note: Mostmanufacturersofberoptictransmissionsystemsspecifythemaximumallowablereturn
loss for error free operation.
TheTURBOTEST500Boffersthelatesttechnologyinasingleberbi-directionallossandreturnloss
testing that provides the exchange of loss data and references between units. The instrument performs
threeberopticmeasurements:OpticalPower(OPM),OpticalReturnLoss(ORL),andOpticalLoss
(OLTS)measurements.InautomaticTURBOmode,theinstrumentperformsbothOpticalReturnLoss
(ORL) and Optical Loss (OLTS) measurements.
TheTURBOTEST500Bcanstoreupto920recordsinanycombinationofitsfouroperatingmodesand
if any configuration other than TRIPLE wavelength is selected. If the configuration is TRIPLE wavelength,
theTURBOTEST500Bcanstoreupto460records.StoredtestresultscanbetransferredtoaPCfor
a complete report generation. For a complete description of the PC executable software, refer to the
User’sGuidesuppliedwiththesoftware.
An optional dedicated digital TALK option is available for full time/full duplex communication between
test operators while testing other fibers in a bundle.
TheTURBOTEST500BispoweredbytheinternalrechargeableLithium-Ionbatterypackorexternal
AC power adapter.
Recommended Accessories
YouwillneedberoptictestjumperstoconnecttheTURBOTEST500Btotheberundertest.Test
jumpersmusthavethesamecoreandcladdingsizeastheberundertest.Theconnectoratoneend
ofthetestjumpermustmatewiththeappropriateopticalportontheTURBOTEST500B.Theconnector
on the other end must mate with the fiber optic link under test. Test jumpers with a variety of lengths
and connector styles are available from Noyes.
Optical ports and connector end faces must be kept free from dirt or other contaminates to ensure
accurate measurements and operation.
ForcleaningconnectorendfacesontheTURBOTEST500BVoiceandTestPorts,testjumpers,andin
berframesoradapters,NoyesrecommendsusingourexclusiveFCC2non-hazardouscleaninguid
and CCT molded cleaning tips.
The FCC2 fluid is a non-flammable, environmentally safe, residue free solvent engineered to clean fiber
connector end-faces.
The CCT molded cleaning tips introduce a new fiber connector end face cleaning technology. Rather than

3
Section 1
a fabric-covered or foam-covered stick, we are offering a molded cleaning tip that will trap contamination
and wick cleaning solvents from bulkhead connectors. This new cleaning tip is a molded, sintered
polymer that is both porous and pliable conforming to virtually any fiber end-face polish geometry while
trapping and absorbing contaminants.
CCT cleaning tips and FCC2 cleaning fluid may be combined into FCP1 fiber optic cleaning kits. Noyes
offers a complete selection of FCP1 cleaning kits for field cleaning. The FCP1 Series of kits delivers
compact, safe, easy to use, reliable cleaning for all types of fiber optic connector end faces.
Visit our web at www.AFLtele.com/go/Clean for more information.
ForcleaningtheTURBOTEST500BOPMopticalportandadaptercaps,asupplyofopticalcleaning
wipes and IPA (Reagent Grade Isopropyl Alcohol 99% or better) and a can of filtered compressed air
may be used.

4
TURBOTEST 500B User’s Guide
Section 2: Functional Description
TURBOTEST 500B Ports
Figure 2-1. TURBOTEST 500B Ports.
Menu
TURBOTEST 500B
Optical Loss Test Set
Voice Test Port OPM
Talk Active Laser Active
18V
Back
10101
NOYES
AFL Telecommunications
Test
Headphone Input
Usedforconnectingtheheadsettothe
TURBOTEST 500Bfor communication
between test sets.
Optical Test port
Optical port for return loss testing,
loss testing, and for generating a
270Hz(1kHz,2kHz)tone.Usethe
providedAPC/UPCreferencecable
for connections.
Voice port
Allows connection to another
TURBOTEST500Boracompatible
talk set.
Serial Transfer Cable input
Allows connection to a PC for file
transfer.
Power port
DCpowerinput(18V,2.2Amaximum).
This is the interface for the AC power
adapter.
OPM optical input
(Adapter Cap mount)
Accepts Noyes thread-on adapter
caps.
Adapter cap
TheOPMportmustbeequippedwithanadaptercap.
Caps for different connector styles are available from
Noyes.
Removable Cleaning port
Provides access to the internal ferrule
for safe and easy cleaning.
AC/Charger indicator
When [ON ], indicates that an AC
adapterisconnectedtotheTURBOTEST
500B. The red light indicates that the
rechargeable battery is charging. The
green light indicates that the battery is
fully charged.

5
Section 2
Front Panel Features
Figure 2-2. The TURBOTEST 500B Front Panel
TURBOTEST 500B
Optical Loss Test Set
Voice Test Port OPM
Talk Active Laser Active
18V
10101
NOYES
AFL Telecommunications
Menu
Back
Test
[UP] and [DOWN] arrow keys
Usedtonavigatemenus.
Display
Usedtoshowvariousscreensandsetup
menus,measured power or loss, and
calibrated wavelength.
[Power] key
Press and hold to turn the instrument
on or off.
[Back] key
Press to return to the previous screen.
Press and hold to return to the top-level
test screen.
[Menu] key
Presstoaccessthe[MAINMENU]screen
for the current test mode.
[Talk Active] indicator
When [ON], indicates that Talk laser is
active.
[Backlight] key
Press to turn the display backlight [ON]
or [OFF].
Soft keys
The label shown on the display above
the key indicates the current function
assigned to the key. Press the soft key
to activate the command.
[Laser Active] indicator
When [ON], indicates that the laser
transmitter is turned [ON].

6
TURBOTEST 500B User’s Guide
Power Adjust Turn laser On or Off, generate
tone(OPMmodeonly)
Coarse/Fine laser adjustment
Limits Set OLTS and ORL PASS/FAIL limits
[MAIN MENU] of the Current Test
Mode
Other Functions
General Setup
Version Displaysrmwareversion
Review Results Review saved tests in the open file of
the current test mode
Battery Percent Displaysbatterycapacity
or AC if plugged in
References Set references for the current test mode
Talk Set Talk option setup (if installed)
Contrast AdjustLCDcontrast
Time Hr:Min(24-hoursformat)
Date Day/Month/Yearformat
Sound Turn On/Off beeper function
Power Save Turn On/Off
Limits Turn On/Off PASS/FAIL limits
New Create new files
Open Makethelecurrent
Delete File Deletesavedles
Transfer to PCDownloadlestoaPC
Statistics Total number of saved files
Files per each test mode
% of available memory
Test Mode Activate the desired test mode
Section 3: Common Functions
Main Menu Configuration
WhentheTURBOTEST500Bispoweredon,theworkingscreen-[TEST]screenofthecurrentlyselected
testmodeisalwaysdisplayed.The[MAINMENU]screenofthecurrentlyselectedtestmodemaybe
accessedfromthe[TEST]screenbypressingthe[MENU]key.
• Toselectasub-menu,usethe[Up]or[Down]arrowkeytohighlightamenuitem,thenpressthe
[SELECT] soft key to display a sub-menu screen.
• Pressthe[BACK]keywilldisplayapreviousscreenorsub-menuscreen.
Thediagrambelowillustratesthe[MAINMENU]structure.
File
Figure 3-1. Main Menu Configuration.
Language Displayavailablelanguage
Unit MainorRemote
Edit Header Edit test information:

7
Section 3
Selecting Test Mode
The TURBOTEST 500B offers five operating modes to perform the following fiber optic
measurements:
• [TURBO]mode-bothopticalreturnlossandopticallossmeasurements.
TwoTURBOTEST500Bunitsarerequiredtooperateinthismode.Whenthe[TURBO]modeis
enabledoneTURBOTEST500Bunitauto-linkstosecondTURBOTEST500Bunit.
• [OLTS]mode-opticallossmeasurements.
TwoTURBOTEST500Bunitsarerequiredtooperateinthismode.Whenthe[OLTS]modeis
enabledoneTURBOTEST500Bunitauto-linkstosecondTURBOTEST500Bunit.
• [REMOTE]mode-forcestheTURBOTEST500Bunitintothe[SmartRemote]mode.
• [OPM]mode-performsopticalpowermeasurements.
• [ORL]mode-performsopticalreturnlossmeasurements.
To Select a Test Mode
1 Fromthe[MAINMENU]screen,useeither[UP]or[DOWN]arrowkeytohighlightthe[TESTMODE]
option.
2 Press the [SELECT] soft key to display a list of available test modes.
3 Useeither[UP]or[DOWN]arrowkeytohighlightthedesiredtestmode.
4 Press the [SELECT] soft key to confirm your selection.
5 A [TEST] screen of the selected test mode will be displayed.

8
TURBOTEST 500B User’s Guide
File Management
All the commands and sub-screens you need for creating new files, adding or editing the test identification
parameters, opening saved files, deleting saved files, or downloading saved files to a PC can be accessed
fromthe[FILEMENU]screen.
Toaccessthe[FILEMENU]screen,performthefollowingsteps:
• Fromanyscreen,pressthe[Menu]keytodisplaythe[MAINMENU]ofthecurrentlyselectedtest
mode.
• From the [MAIN MENU] screen, use either [Up] or [Down] arrow key to highlight the [FILE]
option.
• Pressthe[SELECT]softkeytodisplaythe[FILEMENU]screen.
File Menu Configuration
Thediagrambelowillustratesthe[FILEMENU]structure.
[FILE MENU] of the Current Test Mode
New Create new file and
add test identification
information as follows:
filename, tested fiber
numbers, test location,
technician and company
information, and add
notes.
Open Maketheselectedle
current.
Delete File Deletesavedles.
Transfer to PCDownloadlestoaPC.
Statistics Total number of saved files
Files per each test mode
% of available memory.
Figure 3-2. File Menu Configuration.
Edit Header Edit test information:
filename, tested fiber
numbers, test location,
technician and company
information, and notes.

9
Section 3
Creating a New File and Setting Test Identification Parameters
The[NEW]optionfromthe[FILEMENU]screenallowsyoutocreateanewletowhichaseriesof
tests will be saved and set up test identification parameters, such as filename and number, test location,
technician and job information, and add notes.
1 Whenthe[FILEMENU]screenisdisplayed,the[NEW]optionishighlightedbydefault.
2 Pressthe[SELECT]softkeytoaccessthe[EDITFILEHEADER]screen.
The display appears as follows:
EDITFILEHEADER
CBL: CABLE01
FROM:1
LOC:
TECH #:
JOB #:
NOTE:
SAVE SELECT
The following sections explain how to set each test identification parameter.
Changing the Default Filename
Bydefault,theTURBOTEST500Bcreatesthelenamelabeled[CABLE01].Thisdefaultlenamemay
be changed if needed. A Filename may consist of up to 10 characters. To change the default filename,
perform the following steps.
1 Fromthe[EDITFILEHEADER]screen,useeither[Up]or[Down]arrowkeytohighlighttheline
labeled [CBL].
2 Pressthe[SELECT]softkeytodisplaythe[CABLENUMBER]screen.
The display appears as follows:
CABLENUMBER
CABLE 01XXX
Table of alphanumeric characters
BACK = BACKSPACE
OK CANCEL SEL
Filename field - editable text field
Table of alphanumeric characters
3 Press the [BACK] key multiple times to clear the filename field.
4 Useeither[Up]or[Down]arrowkeytohighlightthedesiredcharacterfromthedisplayedtableof
alphanumeric characters.

10
TURBOTEST 500B User’s Guide
5 Press the [SEL] soft key to enter the highlighted character in the filename field.
6 Repeat steps 4 & 5 to enter up to 10 characters.
7 Whenyounishenteringcharacters,pressthe[OK]softkeytoreturntothe[EDITFILEHEADER]
screen.
8 You may continue setting other test identification parameters by selecting the desired parameter
(refer to the corresponding section for details).
9 Or you may save the created file by pressing the [SAVE] soft key.
10 If you choose the [SAVE] option, you will be prompted to confirm creation of a new file.
• Choose[YES]tosavethecreatedleandreturntothe[TEST]screenofthecurrentlyselected
test mode.
• Orchoose[NO]toreturntothe[EDITFILEHEADER]screen.
Note: If you attempt to create a new file with the filename that already exist, you will be prompted to
confirm overwriting. Choose [YES] to confirm or [NO] to cancel overwriting.
Setting the [START FIBER] Parameter
Bydefault,theTURBOTEST500Bsetsthe[startber]parameterasnumber1.Thisparametermaybe
changed if needed. To set the [START FIBER] parameter, perform the following steps.
1 Fromthe[EDITFILEHEADER]screen,useeither[Up]or[Down]arrowkeytohighlighttheline
labeled[FROM].
2 Press the [SELECT] soft key to display the [START FIBER] screen.
The display appears as follows:
START FIBER
XXXX
0 1 2 3 4 5 6 7 8 9
BACK = BACKSPACE
OK CANCEL SEL
[Start fiber number] field - editable numeric field
Table of numeric characters
3 Press the [BACK] key multiple times to clear the editable numeric field if needed.
4 Useeither[Up]or[Down]arrowkeytohighlightthedesiredcharacterfromthedisplayedtableof
numeric characters.
5 Press the [SEL] soft key to enter the highlighted character in the editable numeric field.
6 Repeat steps 4 & 5 to enter up to 4 characters.
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