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Telos Zephyr Xstream Two-Way Radio User Manual

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USER’S MANUAL

Section 3: GUIDED TOUR of the HARDWARE 20

Headphone Jack & Volume Control

Thefrontpanelhasaheadphonejackneartheleftside.

Theadjacentknobcontrolsthelevel.Thisjackduplicates

thereceivesignalonthemainoutputsontherearpanel.

\

Meters and indicators

ThefollowingLEDsallowyoutomonitorthesystemstatusandaudiolevels:

Sync LED

ThegreenSyncLEDindicates,“alliswell”withthesystem.Itindicatesthat

certainclocksignalsarepresentandthattheinternalPLLiswithinitsnormal

range.ThisLEDshouldnormallybeilluminatedatalltim

esiftheinternalISDN

interfaceisfunctioningandselectedasyourInterfaceintheTELMenu.

WhentheV.35/X.21interfaceispresent(andselected)theSyncLEDwillbe

illuminatedonlyifavalidexternalclocksignalatthecorrectfrequencyfortheBit

Ratesetting(intheCODECmenu)ispre

sentononeofthetwoV.35/X.21ports.

WhentheEthernetinterfaceisselected,theSyncLEDwillblinkwhiletheXstream’sclockworks

tosyncwiththeXstreamontheothersideoftheconnection.Duetonetworkconditions,itis

commonforthislighttobesolidlyon,th

enstartblinkingagainastheclockreadjusts.

Lock 1 & 2 LEDs

ThegreenLock1andLock2LEDsrepresentthecodecdecoderstatus.

Thesewillilluminatewhenavalidbitstreamisreceivedasfollows:Ifadualchannelreceive

modeisused(i.e.L3Dual/Mono,orG.722)theLock1LEDre

presentsthatthedecoderislocked

(or“framed”)totheincomingcodedaudioon“Line1”whiletheLock2LEDrepresentsa

decoderlockonanincomingaudiostreamon“Line2”.

Inthecaseofastereo,ormono‐128,receivemode,bothlockLEDswillilluminateonlyoncea

compati

blepairofbit‐streamsarepresentonboth“Lines”.

Send Bargraph

TheSendBargraphLEDsrepresentthelevelofaudiointothecodersection.Thislevelis

effectedbyseveralfactors:theoutputlevelofthedeviceconnectedtotheZephyrXstream;the

settingsoftheinputleveljumpers(seeSection5);thesetti

ngoftheLevelInoptionintheAUDIO

menu;andthesettingoftheGaintrim(maybecalledInGainonearlysoftwareversions)setting

intheAUDIOmenu.

Aswithmostdigitalequipment,thesemetersarecalibratedindBfs(decibelbelowfullscale).In

otherwords,thetopLE

DrepresentstheclippointandthenumbersarecalibratedindBbelow

fullscale.ThereforeitisessentialthatyourlevelsbesettowherethetopLEDisneverlit.

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