CPU (DISPLAY UNIT, IC1;
continue)
MAIN unit, IC10
Pin
Port
number
name
Description
Pin
Port
number
name
Description
79 EKEY
Output port for electronic keyer signal.
81
MET
Outputs meter signals with a
PWM
wave form.
82,83
DIUP,
Input
ports for the main dial using
pulse signals.
4 NB
Outputs noise blanker control signal.
"High":
Noise blanker activates.
5
SATL
Outputs
control signal for satellite
mode.
EDOT,
Input
ports for electronic keyer,
84,85
EDSH
"EDOT"
for dot and "EDSH" for dash
signal.
Outputs audio select signal.
6
MSC
"High": MAIN
band's audio signals
are selected.
90
ADSSM
Input
port for SUB band's S-meter
signal.
11
SDOFF
Outputs
PTT disable signal to ignore
SEND input from the ACC connector.
91
ADSCM
Input
port for SUB band's center
indicator
signal.
92
ADSMS
Input
port for MAIN band's S-meter
signal.
93
ADMCM
Input port for MAIN band's center
indicator
signal.
94
ADSNO
Input
port for SUB band's noise level
signals.
Outputs UHF transmitter circuit control
12 BT8
signal.
"High":
Transmitting on UHF.
Outputs both VHF and UHF receiver
13
R8
circuit control signals.
"High": Receiving on VHF/UHF.
Outputs VHF transmitter circuit control
95
ADMNO
Input
port for MAIN band's noise level
signals.
14 AT8
signal.
"High":
Transmitting
on
VHF.
96
ADRF
Input port for Tx RF level signal.
97
ADALC
Input port for ALC level signal.
98
ADPTT
Input port for [PTT) switch.
99
ADMIC
Input
port for up/down signal from the
microphone.
MAIN
unit,
IC24
Pin
Port
number
name
Description
~54
OUTPUTEXPANDERICs
4
SCWN
Outputs
CW-N mode select signal for
SUB band.
MAIN
unit,
Ica
5
SCW
Outputs
CW mode select signal for
SUB band.
Pin
Port
number
name
Description
6 SSSB
Outputs SSB
mode select signal for
SUB band.
4 MCWN
Outputs CW-N mode select signal for
MAIN band.
Outputs AGC time constant control
7
SAGC
signal for SUB band.
"High": AGC fast is selected.
5
MCW
Outputs CW mode select signal for
MAIN band.
11
SSCN
Outputs
scan signal for SUB band.
6
MSSB
Outputs SSB
mode select signal for
MAIN band.
12
TSFM
Outputs
switching signal of tone
squelch filter for
SUB band.
Outputs AGC time constant select
7 MAGC
signal for
MAIN band.
13
/SFM
Outputs
FM
mode select signal for
SUB band.
"High": AGC fast is selected.
11
MSCN
Outputs
scan signal for MAIN band.
14
SFM
Outputs
non-FM mode select signal
for
SUB band.
12
TSFM
Outputs
switching signal of the tone
squelch filter for
MAIN band.
13 /MFM
Outputs non-FM mode select signal
for
MAIN band.
14 MFM
Outputs
FM
mode select signal for
MAIN band.
4-8
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