144BASIC OPERATION4■ Squelch level settingThe squelch circuit mutes the received audio signal depend-ing on the signal strength. The transceiver has 9 squelch lev-els, a continuously open setting and an automatic squelchsetting.➥ While pushing and holding [SQL] (ATT•SET), rotate [DIAL]to select the squelch level.• “LEVEL 1” is loose squelch (for weak signals) and “LEVEL 9” istight squelch (for strong signals).• “AUTO” indicates automatic level adjustment by a noise pulsecounting system.• “OPEN” indicates continuously open setting.■ Operating mode selectionOperating modes are determined by the modulation of theradio signals. The transceiver has 3 operating modes: FM,AM and WFM modes. The mode selection is stored indepen-dently in each band and memory channels.Typically, AM mode is used for the AM broadcast stations(0.495–1.620 MHz) and air band (118–135.995 MHz), andWFM is used for FM broadcast stations (76–107.9 MHz).WFM mode cannot be selected below 30 MHz bands.➥ While pushing and holding [FUNC], push [CALL](MODE •SCAN ) several times to select the desired operatingmode.SCANS.MWATTDTCST SQLWFMAM -DUPLOWVOL PRIO P SKIPMR519ATTDTCST SQLWFMAM -DUPLOWVOL PRIO P SKIPMR519ATTDTCST SQLWFMAM -DUPLOWVOL PRIO P SKIPMR519FM modeAM modeWFM modeSCANSETSCANS.MWSETATTDTCST SQLWFMAM -DUPLOWVOL PRIO P SKIPMR519ATTDTCST SQLWFMAM -DUPLOWVOL PRIO P SKIPMR519[DIAL]Automatic squelchMaximum levelSETPush Push and hold Dual operation