User`s manual

UnlockingtheUnit

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TounlocktheunitpressENTER andthentypethecod ein.ThiscanbeenteredbyusingtheFREQcontrolto

selectacharacter,andtheBACKandNEXTkeystomovetothenextcharacter.Alternatively,theEDITkeyscan

beusedtoenteracodebypressinganycombinationoftheeightb

uttons.EachEDITkeyrepresentsitschannel

labelling,asdescribedinthelockingsection.

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ForgottenthePassword?

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Don’tpanic!Yourunitcanstillbeunlocked.InanattempttoimprovethesecuritysystemontheDSO480,

andpreventastandardmasterpasswordfrombecomingcommonknowledge,theunitsnowhavearandom

passwordkeygenerator.

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Theprocedureforunlockingaunitusingthepasswordoverrideisexplainedbel

ow:

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SwitchtheunitonwiththeMENUkeyheldinmomentarily.Afterafewseconds,theunitwillaskforasecurity

code.UsetheEDITkeysinthesamemannerasforenteringlockcodes(seepage27fordetails)andenter

2121.

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Thedisplaywillshow:

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Enter PROEL Supplied Code:

reak Code = 12345 [NNNN]

TheBreakCode(intheexample12345 )shouldbenotedandsuppliedtoPROEL. Wehavesoftwareto

generatethecorrespondingPassCodewhichshouldbetypedin,followedbyENTER.Thiswillunlocktheunit

andwipethepreviouspassword.

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Notethefollowingaboutthisprocedure:

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OncetheBreakCodehasbeennoted,doNOTpressMEN

Uagainduringtheoperationoftheunit(excepttoget

backtothispointonpowerup),oradifferent codewillbegenerated.Theunitmaybeusedasnormal,but

everypressofMENUwillchangetheBreakCode,sothePassCodePROELsupplywillno

twork!

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Theunitmaybeswitchedonandoffasnecessary–justbesureNOTtopressMENU,ortheentireBreakCode

procedurewillhavetoberepeated.