Icom IC-R8500 Panel Description, Front panel, ➊ POWER SWITCH POWER Turns power ON and OFF

1 PANEL DESCRIPTION

■Front panel

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SLEEP/ SET

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REC

REMOTE

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REC OUT

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PHONES

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S	1 3 5 7 9 +20dB+60dB		FM
			SLEEP
	SIGNAL		LOCK
			NB AFC AGC-F APF-N	BANK	I
	iC-r8500		RECV 10-ATT-20	ICOM
COMMUNICATION RECEIVER
		MODE
WFM	FM	AM	SSB/CW	TS
NB/AFC	AGC	10dB	20dB	TS
AF GAIN		SQUELCH	APF IF SHIFT	SPCH
				LOCK
				APF

i o !0 !1 !2 !3 !4

➊POWER SWITCH [POWER] Turns power ON and OFF.

➋SLEEP/SET SWITCH [SLEEP/SET]

➥Push momentarily to set the sleep timer (p. 29).

•Selectable times are 30, 60, 90, 120 min. or OFF.

•“ SLEEP ” appears in the function display when the sleep timer is set.

➥Push for 1 sec. to enter quick set mode (p. 30).

•Use the [M-CH] selector and main dial to select items and contents, respectively.

➌RECORDER REMOTE JACK [REC REMOTE] (p. 10) Controls the running of a tape recorder for record- ing. Connects to the REMOTE jack on a tape recorder.

➍RECORDER JACK [REC OUT] (p. 10)

Outputs an audio signal. Connect to the AUX or LINE IN jack on a tape recorder.

➎HEADPHONE JACK [PHONES]

Accepts headphones with 4–16 Ω impedance.

•When headphones are connected, no receive audio comes from the speaker.

•Stereo headphones can be connected, however, output is monaural.

➏MODE 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).

➐NOISE BLANKER/AFC SWITCH [NB]/[AFC] Activates the noise blanker function or automatic fre- quency control function.

•The noise blanker is used for removing pulse-type noise when 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).

➑AUDIO FREQUENCY GAIN CONTROL [AF GAIN] (p. 13)

Rotate clockwise to increase the audio output; rotate counterclockwise to decrease the audio output.

➒AUTOMATIC 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.

➓SQUELCH CONTROL [SQUELCH] (p. 14)

Varies the squelch threshold level (to mute noise when receiving no signal).

	S-meter squelch
	threshold
Noise squelch	• Signals below the
	S-meter level
threshold (not
	are muted.
available in SSB,
CW, WFM and
AM narrow modes)

!1IF SHIFT CONTROL [IF SHIFT] (p. 14)

Shifts the center frequency of the receiver’s IF pass- band to reject interfering signals.

• Cannot be used in FM, WFM and AM modes.

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