PANEL DESCRIPTION1 21PANEL DESCRIPTION1 r SQUELCH BUTTON [SQL]Push and hold to force the squelch open and to adjusts thesquelch level with [Y]/[Z] keys.t UP/DOWN KEYS [YY]/[ZZ]A Selects the operating channel or adjusts the squelch level.B Adjusts the audio level.• The function B is available when “dial” is assigned with [VOL] inINITIAL SET MODE (p. 51).y KEY PAD (pgs. 3–6)Used to enter operating frequency, the DTMF codes, etc.u ANTENNA CONNECTORConnects the supplied antenna.i [SP]/[MIC] JACKConnect an optional speaker-microphone or headset, if desired.The internal microphone and speaker will not function when ei-ther is connected.D External connectionNOTE: When connecting or disconnecting an external speaker-microphone, first turn the transceiver power OFF.o FUNCTION DISPLAY (pgs 7, 8)‘‘ Switches, controls, keys andconnectorsq CONTROL DIAL [VOL]A Adjusts the audio level.B Selects the operating channel or adjusts the squelch level.• The function B is available when “dial” is assigned with [VOL] inINITIAL SET MODE (p. 51).w POWER SWITCH [POWER]Push for 1 sec. to turn the power ON and OFF.e PTT SWITCH [PTT]Push and hold to transmit; release to receive.qwertyouiSpeakerMicropho[SP] jackSPSPGND[MIC] jackMICMICGNDPTTMIC5 VMIC GNDSP (AF OUT)REMOTESP GNDExternal microphone(Nominal impedance 2k Ω)33 kΩExternal speaker(Nominal impedance 8 Ω)ø3.5 mmplugø2.5 mmplug