PHYSICAL LAYOUTCD PWR/VOL (A) controlTurn clockwisetoswitchONthedualbander. Turncounterclockwise(toPWROFF)toswitchOFFthepower.Also adjuststhevolumeofthebanddisplayedintheupperDisplayhalf (A).(2) VOL (B) controlAdjusts the volume of the band displayed in the lowerDisplay half (B).G) ENC (Encoder) controlSelects datanecessarytouseandcontrolyourdualbander,e.g.operating freguencies,freguencysteps,memorychannels,menuitems,etc.Also reversesthedirection ofanyof thescans.(4) RX/TX indicatorsEachindicates the receiveandtransmitstate ofitsassociated band.Theleftindicator reports on thebanddisplayedon theupper Displayhalf(A)andtherightindicator reports on theband displayedon the lowerDisplayhalf (B).Eachlightsgreenwhenasignalisreceived andredwhenyouare transmitting.(6) LOW keySelects the different levels of transmit output power.© BAND keySelects theOperating bandon which you can transmitand receive, Also selects theVHF/VHF and UHF/UHFconfigurations.(7) Function keys and DTMF keypadUsedforaccessingfunctions,menuitems,helpinformation,etc.AlsousedforsendingDTMFtones.(8)PTT(Push-To-Talk)switchHolddowntotransmit.Releasetoreceive.(9) LOCK switchLocks most keys and the ENC control.(0)LAMPkey (TH-79A),TONEkey (TH-79E)OntheTH-79A,controls theDisplayillumination.OntheTH-79E,presstotransmita1750Hzrepeateraccesstone.TheLampkeyislocated onthefront.(1D MONI (Monitor) keyHold down to listen to the current receive frequencieson the 144 MHz and 430/440 MHz bands.42 CTCSS unit installation slot {page 65}43) MIC/SP jacksIf desired, connect an external microphone, speaker, orspeaker-microphone. Keep water out of these jacks:44) DC jackConnectaBC-17wallchargerforrecharging. AlsoacceptsaPG-2W DC powercableifan externalpowersupply(5.5Vto16 V)isused,oraPG-3Jcigarettelightercableformobile operation.