10013MENU SCREEN OPERATION12345678910111413141516171819DD Squelch delaySelects squelch delay from short and long to prevent re-peated opening and closing of the squelch during receptionof the same signal.• SHORT : Short squelch delay. (default)• LONG : Long squelch delayDD Mic sens levelSelects the microphone sensitivity from HIGH (default) andLOW to suit your preference.DD Auto ATTThe attenuator prevents distortion of a desired signal by verystrong RF signals near the desired frequency or when verystrong electric fields, such as from a broadcasting station, arepresent at your location.Select the attenuator function ON (default) and OFF.DD ALCSets the ALC (Automatic Level Control) function ON and OFF(default) .The ALC function reduces the microphone again automati-cally when the transmission audio is distorted.DD DiversityTurns the diversity function ON and OFF (default) .DD GPSTurns the GPS function ON (default) and OFF.DD HM-154 UP/DNSets the assigning function to the [UP]/[DN] keys on the op-tional HM-154.Assignable functions:• MIC-UP* (default)• MIC-DN † (default)• F/LOCK (as [F• ])• DUP/MONI (as [DUP•MONI])• TONE/DTMF (as [TONE•DTMF])• LOW/PRIO (as [LOW•PRIO])• L M.CALL/MW (as [M/CALL•MW] for Left band)• L V/MHz/SCAN (as [V/MHz•SCAN] for Left band)• L MAIN/BAND (as [MAIN•BAND] for Left band)• R M.CALL/MW (as [M/CALL•MW] for Right band)• R V.MHz/SCAN (as [V/MHz•SCAN] for Right band)• R MAIN/BAND (as [MAIN•BAND] for Right band)*Available for “HM-154 UP” only; †Available for “HM-154 DN” only