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Page69of 72

14.2 Connection Information and Pin Out Diagrams

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14.2.1 Power Connector

2.1mmx5.5mmpolarizedconnector.DCvoltagefrom12–25vdc.

14.2.2 Ground Connection

Thisthumbscrewisforattachinganearthgroundtothechassisofthetuner.Groundingisthemostcritical

safetyenhancementyoucanmaketoyourshack.AlwaysgroundthetunertoyourstationRFgroundusing

high‐qualitywiring,makingthelengthasshortaspossible.Braidedwireisconsidered

thebestforground

applications.Yourstationgroundshouldbeacommonpointwhereallgroundscometogether.Youwillli kelybe

usingaPCandaDCpowersource,sobesuretogroundthesedevicestogetheraswell.

14.2.3 Push to Talk (PTT)

14.2.3.1 PTT IN

ThisRCAconnectorisprovidedforanexternalPush‐To‐Talksignal.GroundthecenterpintoengagePTT.(Note:

3.3VDCMax.Input.)

14.2.3.2 PTT OUT

ThisRCAconnectorisprovidedtosupplyaPush‐To‐Talksignaltootherdevices.Thecenterpinisgrounded

whenPTTisasserted.NotethattheTunerGeniusXLprovidesthissignalaftermakinganyadjustmentstothe

tuningsolutionwhenitreceivesPTT.Thissignalcanthereforebeused

tosynchronizeRFgenerationsothatthe

RFsignalisnevergeneratedbeforethetunerisreadytoreceiveit.

14.2.4 RS-232 Serial Connector Pinout

RS‐232standsforRecommendedStandardnumber232.RS‐232,asaninterface,hasbeenastandardformany

yearsandistypicallyemployedtoconnectaperipheraltoacomputer.Thestandardspecifiesamaximumopen‐

circuitvoltageof25volts:signallevelsof±5V,±10V,±12V,

and±15Vareallcommonlyseendependingon

thevoltagesavailabletothelinedrivercircuit.FortheTGXL,theRS‐232voltageis+12and‐12vdcandusespins

2,3,and5.Pleaseconsultthediagrambelowfordetails.

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FlexRadio Systems Tuner Genius XL User Manual

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