Icom IC-821H - Page 16

MAIN unit, IC108
Pin
Port
Description
number
name
4
SIDE
Outputs
side-tone select signal.
5
PHOUT
Outputs
switching signal for head
phone audio select.
Outputs high speed packet control
6
EXMOD
signal.
"High": 9600 bps is selected.
11
BKIN
Outputs
break-in control signal.
12
TOTe
Outputs TOT control signal.
Outputs microphone amplifier gain
13
EGAIN
switching signal for external audio
input.
DISPLAY unit, IC8
Pin
Port
Description
number
name
Outputs attenuator control signal for
ATT140
VHF
band.
4
"High": When attenuator is
activated.
Outputs attenuator control signal for
ATT400
UHF band.
5
"High": When attenuator is
activated.
Outputs pre-amplifier control signal for
PRE140
VHF
band.
6
"High": When pre-amplifier is
activated.
Outputs pre-amplifier control signal for
PRE400
UHF band.
7
"High": When pre-amplifier is
activated.
12
LDIM
Outputs
dimmer control signal.
"High": Bright
Outputs TX indicator control signal for
13
LEDTS
SUB
band.
"High": SUB TX indicator lights
Outputs TX indicator control signal for
14 LEDTM
MAIN band.
"High": MAIN TX indicator lights
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