Thank you for purchasing the SM-20DESKTOP MICROPHONE.】INSTRUCTIONSThe SM-20 is a unidirectional,electretDESKTOP MICROPHONEmicrophone designed for base stationoperation with an Icom transceiver.SM-20The SM-20 cannot be used with anon-lcom transceiver since the power issupplied from the connected transceiver.FRONT VIEWBOTTOM VIEW@MIC GAIN④思060②3O FREQUENCY UP/DOWN SWITCHESMIC GAIN CONTROL [MIC GAIN][UP]/[DOWN]Varies microphone output level.UseChange the frequency up or down.this control when the connected trans-Some transceivers do not have thisceiver has no mic gain controls.function.NOTE:Rotating the control too far2 PTT SWITCHclockwise may result in overmod-Push to transmit,then release to re-ulation and transmit signal distortion.ceive.6 LOW CUT SWITCH [LOW CUT]③PTT LOCK SWITCH [LOCKCuts out low-frequency components ofPush IN to transmit continuously,theninput voice signals.push OUT to receive.·MICROPHONE PINBNo connectionCONNECTION①Microphone outputGND(microphone ground)②+8 V DC input⑥GND(PTT ground)The pins are shown from⑤PTTthe cable,or rear.side of③Frequency up/downthe plug.④No connectionIcom Inc.Count on us!6-9-16,Kamihigashi,Hirano-ku,Osaka 547.JapanA-8097@-1EX Printed in JapanCopyright 1991 by Icom Inc.
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