Kenwood TS-140S Instruction Manual

Also see for TS-140S: Instruction manual Instruction manual Instruction manual Instruction manual Instruction manual

8-2-2. Noise ReductionInmotorvehicles,noiseisgenerated bytheignitionsystem. Other sourcesofnoise include thewiperandheatermotors.Althoughthetransceiverisequippedwithanoiseblankertominimizeignitionnoise,itisimperativethatsomepreventivemeasuresbetakentoreducethe noisetothelowestpossiblelevel.(1) Antenna location selectionSince ignition noise is generated by the vehiclesengine, the antenna must be installed as far from theengine as possible.(2) BondingThecomponentpartsofmotorvehicles,suchastheengine,transmission,mufflersystem,accelerator,etc.,arecoupledtooneanotheratDCand lowfre-quencies,butareisolatedathighfrequencies.Byconnectingthesepartsusingheavy,braidedgroundstraps,ignitionnoisecan bereduced.Thisconnec-tioniscalled‘‘bonding’’.(3) Use ignition suppressor cable or suppressorspark plugsNoisecanbereducedbyusingsparkplugs within-ternal resistors,orresistivesuppressorignitioncable.8-2-3. Battery CapacityThepower systemofamotorvehicleiscomprisedofabatteryandanalternator(which generatespowerwhile theengineisrunning)tosupplycurrenttoloads or to charge the battery.Sincethetransceiverdrawshigh currentduringtransmit,careshouldbeexercisedsothepowersystemisnotoverloaded.Whenusingthetransciever, thefollowingpointsshouldbeobservedfromtheviewpointofbatterymaintenance:1.TurnthetransceiverOFFwhenthelights,heater,wipers andotherhigh-drawaccessoriesareused.2.Avoidtransceiver operationwhentheengineisnotrunning.3.Ifnecessary,useanammeterand/oravoltmetertocheckbattery condition.42

/ 44

Related manuals for Kenwood TS-140S