KXAT3-Option-Rev-A1操作说明书手册

Elecraft KX3KXAT3 Wide Range Internal Antenna TunerInstallation InstructionsRevision A1,January 12,2017E740168Copyright2017,Elecraft,Inc.,All Rights ReservedIntroductionThe KXAT3 antenna wide range tuner plugs into existing connectors inside the KX3.The KXAT3 stores thesettings found for the best match at multiple points across each band,allowing for quick frequency and bandchanges.The KXAT3 also includes an automatically tuned filter for the AM broadcast band that tracks theVFO,improving image rejection for signals in the 0.3-1.0 MHz range.ACAUTIONThe KXAT3 module and many components inside your KX3 may be damaged byElectrostatic Discharge (ESD)simply by touching them or a circuit board containingthem unless you take specific steps to prevent such damage.See PreventingElectrostatic Discharge Damage on page 1 before opening the package containing theKXAT3 module or working inside your KX3.Installing the KXAT3 ModulePreparing for InstallationPreventing Electrostatic Discharge DamageESD damage may occur with static discharges far too little for you to notice.A damaged component may notfail completely at first.Instead,the damage may result in below-normal performance for an extended period oftime before you experience a total failure.We strongly recommend you take the following anti-static precautions(listed in order of importance)to ensurethere is no voltage difference between the components and any object that touches them:Leave the KXAT3 module in its anti-static packaging until you install it.Wear a conductive wrist strap with a series 1-megohm resistor that will constantly drain off any staticcharge that accumulates on your body.If you do not have a wrist strap,touch a ground briefly beforetouching any sensitive parts to discharge your body.Do this frequently while you are working.You cancollect a destructive static charge on your body just sitting at the work bench.AWARNINGDO NOT attach a ground directly to yourself without a current-limiting resistor as this poses aserious shock hazard.A wrist strap must include a 1-megohm resistor to limit the current flow.Ifyou choose to touch an unpainted,metal ground to discharge yourself,do it only when you arenot touching live circuits with any part of your body.1