Support User Manuals

Telos Zephyr Xstream Two-Way Radio User Manual

Open as PDF

of 381

USER’S MANUAL

Section 3: GUIDED TOUR of the HARDWARE 41

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

WhentheEthernetinterfaceisselected,theSyncLEDwillbli

nk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,andthenstartblinkingagainastheclockreadjusts.

Lock1&2LEDs

ThegreenLock1an

dLock2LEDsrepresentthecodecdecoderstatus.Whenadualchannel

receivemodeisused(i.e.L3Dual‐monoorG.722)theLock1LEDrepresents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incomi

ngaudiostreamon“Line2”.

InthecaseofareceivemoderequiringbothBchannels(moststereomodeaswellasmono128)

bothlockLEDswillilluminateonlyonceacompatiblepairofbit‐streamsarepresentonboth

“Lines”.

SendBargraph

TheSe

ndbargraphLEDsrepresentthelevelofaudiointothecodersection.Thislevelis

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

settingoftheCh"x"GainoptionintheAUDIOmenus;themixerknobsetting.

Aswithmostdigitalequi

pment,thesemetersarecalibratedindBfs(decibelsbelowfullscale).

Inotherwords,thetopLEDrepresentstheclippointandthenumbersarecalibratedindB

belowfullscale.Therefore,itisimportantthatyourlevelsbesettowherethetopLEDisnever

lit.

Thereisatra

nsitionofLEDcolorat‐10dBfs.Sincethemetersarepeakindicating,itwill

generallybesafetorunthingsintothered,dependingonthedesiredheadroomandthe

dynamicsofthematerial.Whensettinglevelswithasinewave(tone),alevelnearthered

greenbound

aryshouldbeused.

h

HOT TIP!

The individual level for the audio of each of the 4 mixer inputs (post fader) can be monitored

on the first AUDIO menu. This permits viewing the ratio of the 4 inputs in the mix shown on

the main SEND bargraphs.

ReceiveBargraph

TheReceiveBargraphLEDsrepresenttheleveloftheaudiobeingdecodedfromthefarend.

Thelevelismonitoredinthedigitaldomainattheoutputofthedecoder.Thecalibrationand

characteristicsoftheReceivemetermatchthoseoftheTransmitmeter.

previous next