Panel Description; Front Panel - Icom IC-R8500 Instruction Manual

1

PANEL DESCRIPTION

Front panel

POWER SWITCH [POWER]
Turns power ON and OFF.
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 the
SLEEP
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.
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
recorder.
RECORDER JACK [REC OUT] (p. 10)
Outputs an audio signal. Connect to the AUX or
LINE IN jack on a tape recorder.
HEADPHONE 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.
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).
1
q
S
POWER
SLEEP/
SET
w
COMMUNICATION RECEIVER
REC
REMOTE
e
WFM
REC OUT
NB/AFC
r
AF GAIN
PHONES
t
y u i
NOISE 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).
AUDIO FREQUENCY GAIN CONTROL
[AF GAIN] (p. 13)
Rotate clockwise to increase the audio output; rotate
counterclockwise to decrease the audio output.
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.
SQUELCH CONTROL [SQUELCH] (p. 14)
Varies the squelch threshold level (to mute noise
when receiving no signal).
Noise squelch
threshold (not
available in SSB,
CW, WFM and
AM narrow modes)
!1
IF 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.
@0
FM
1 3 5 7 9 + 20dB + 60dB
SLEEP
LOCK
SIGNAL
NB AFC AGC-F APF-N
iC- r8500
RECV 10-ATT-20
MODE
FM AM SSB/CW
AGC 10dB 20dB
SQUELCH APF IF SHIFT
o ! 0 ! 1 ! 2 ! 3 ! 4
S-meter squelch
threshold
• Signals below the
S-meter level
are muted.
BANK
ICOM I
TS
TS
SPCH
LOCK
APF