Icom IC-R8500 Instruction Manual

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11 PANEL DESCRIPTIONq POWER SWITCH [POWER]Turns power ON and OFF.w SLEEP/SET SWITCH [SLEEP/SET]➥ Push momentarily to set the sleep timer (p. 29).• Selectable times are 30, 60, 90, 120 min. or OFF.• “ ” appears in the function display when thesleep timer is set.➥ Push for 1 sec. to enter quick set mode (p. 30).• Use the [M-CH] selector and main dial to select itemsand contents, respectively.e RECORDER REMOTE JACK [REC REMOTE] (p. 10)Controls the running of a tape recorder for record-ing. Connects to the REMOTE jack on a tape re-corder.r RECORDER JACK [REC OUT] (p. 10)Outputs an audio signal. Connect to the AUX orLINE IN jack on a tape recorder.t HEADPHONE JACK [PHONES]Accepts headphones with 4–16 Ω impedance.• When headphones are connected, no receive audiocomes from the speaker.• Stereo headphones can be connected, however, outputis monaural.y MODE SWITCHES [WFM]/[FM]/[AM]/[SSB/CW](p. 13)➥ Push to select an operating mode.• The following keys toggle between several modes:[FM] ................ FM, FM narrow[AM] ................ AM, AM narrow, AM wide[SSB/CW] ....... USB, LSB, CW, optional CW narrow➥ When SSB/CW mode is selected, push [SSB/CW]for 1 sec. to adjust the BFO frequency. (p. 15).u NOISE BLANKER/AFC SWITCH [NB]/[AFC]Activates the noise blanker function or automaticfrequency control function.• The noise blanker is used for removing pulse-type noisewhen SSB, CW or AM mode is selected (p. 15).• The automatic frequency control tunes the displayed fre-quency automatically when an off-center frequency is re-ceived. It activates when FM or WFM is selected (p. 14).i AUDIO FREQUENCY GAIN CONTROL[AF GAIN] (p. 13)Rotate clockwise to increase the audio output; rotatecounterclockwise to decrease the audio output.o AUTOMATIC GAIN CONTROL [AGC] (p. 15)Toggles the time constant of the AGC circuit be-tween “slow” and “fast.”• When “fast” is selected, “AGC-F” appears.• Cannot be used in FM or WFM modes.!0 SQUELCH CONTROL [SQUELCH] (p. 14)Varies the squelch threshold level (to mute noisewhen receiving no signal).!1 IF SHIFT CONTROL [IF SHIFT] (p. 14)Shifts the center frequency of the receiver’s IFpassband to reject interfering signals.• Cannot be used in FM, WFM and AM modes.MODEWFMNB/AFC AGC 10dB 20dBFM AMAPFTSTSSPCHSSB/CWAF GAIN SQUELCHPHONESREC OUTSLEEP/RECREMOTEIF SHIFTAPFSETLOCKCOMMUNICATION RECEIVERiC-r8500POWERSIGNALS 1 3 5 7 9 + 20dB + 60dB@0qwerty i o !0 !1 !2 !3 !4uFMRECVBANK10-ATT-20APF-NAGC-FAFCNB SEL-CHSLEEPLOCKICOM IC-RS-meter squelchthresholdNoise squelchthreshold (notavailable in SSB,CW, WFM andAM narrow modes)• Signals below theS-meter levelare muted.■ Front panel