1 Common Features
5-2 Optional Cable Port Setting
44
Pin No. Description
1 GND (COMMON)
2
Output port for Det. analog AF signal to external
equipment. (See *1for connection details.)
3 GND (INPUT)
4
I/O port for the control signal to/from the
external equipment (H: 5 V, L: 0 V) or Serial
(RXD)*2.
5 No connection
6
Input port for the control signal from the external
equipment (H: 5 V to 30 V, L: 0 V) or IGSW*3.
7
I/O port for the control signal from/to external
equipment (H: 5 V, L: 0 V) or AFO*4.
8 GND (Det.AF)
9 No connection
10
I/O port for the control signal from/to the
external equipment (H: 5 V, L: 0 V) or Serial
(TXD)*
2
.
11
Output port for the control signal to external
equipment.
12 GND (AF OUT)
13
Input port for modulation signal from the
external equipment.
Set the modulation level at external equipment.
(300 mVrmsr3 dB at 1kHz 60% Dev.)
14
I/O port for the control signal from/to the
external equipment (H: 5 V, L: 0 V) or EPTT*5.
15 Output port for voltage line (VCC). (0.3 A max.)
¾ OPC-1939 PIN ASSIGNMENT (D-sub 15 pin)
The optional OPC-1939 (D-sub 15 pin) and OPC-2078
(D-sub 25 pin) can be connected to the IC-F5020 series.
The tables below show their pin assignments.
Pin No. Description
1 No connection
2
I/O port for the control signal from/to external
equipment (H: 5 V, L: 0 V) or Serial (RXD)*
2
.
3
I/O port for the control signal from/to external
equipment. (H: 5 V, L: 0 V) or Serial (TXD)*2.
4,5,6 No connection
7 GND (COMMON)
8
Input port for a modulation signal from external
equipment.
(240 mVrmsr3 dB at 1kHz 60% Dev.)
9
Output port for Det. analog AF signal to external
equipment*1. (See *1for connection condition.)
10
Output port for the control signal to external
equipment.
11 Output port for voltage line (VCC). (0.3 A max.)
12,13 No connection
14 GND (Mod.In)/GND (Det.AF)/GND (AF OUT)
15
Input port for the control signal from external
equipment (H: 5 V to 30 V, L: 0 V) or IGSW*
3
.
16,17,
18
No connection
19
I/O port for control signals from/to external
equipment (H: 5 V, L: 0 V) or EPTT*5.
20,21 No connection
22
I/O port for control signals from/to external
equipment (H: 5 V, L: 0 V) or AFO*4.
23,24,
25
No connection
¾ OPC-2078 PIN ASSIGNEMNT (D-sub 25 pin)
*1Impedance=1k, 240 mVrms r3 dB at 1kHz 60%
Dev.
*2Serial : When you set OPC-1939’s pin 4 or pin 10 to
“Serial port”, pin 10 or pin 4, respectively, will
also be automatically set to “Serial port”.
When you set OPC-1939’s pin 4 or pin 10 to
“Serial port”, pin 10 or pin 4, respectively, will
also be automatically set to “Serial port”.
*3IGSW : Input port for the LCD backlight control signal.
If a voltage is input from external equipment,
the LCD backlight becomes dimmer.
*4AFO: If you set this pin to output the AF signal to an
external amplifier, you can control the
amplifier’s volume level by the radio’s [VOL]
control.
(100 mVrms r 3 dB at 1kHz 60% Dev.)
*
5
EPTT: When this pin goes to “LOW”, the radio
transmits a signal, and mutes the microphone
at the same time.
1 Common Features
5-2 Optional Cable Port Setting
(Continued)
45
¾ Port Setting D-Sub 15 pin (25 pin)
The settings in the red squares in the cloning software
screen below cannot be changed from their default
settings.
Cloning Software: [External I/O] > [Port Setting]
¾ Purpose
Each pin (except of Ext. I/O 11 (10)) has its own
selectable Purpose, and optionally selected Function.
When you set a pin’s “Purpose” to Ext. I/O, you can use
the pin as an external input/output port for a selected
“Function”.
When you set a pin’s “Purpose” to Serial, IGSW, AFO or
EPTT, you cannot change the values of “In/Out”,
“Function” or “Active Logic”.
Purpose
OPC-1939
(D-Sub
15pin)
OPC-2078
(D-Sub
25pin)
Function
Ext. I/O All ports All ports
You can assign one of
several functions to
use the pin for
external input/output
operation.
S
erial
Ext. I/O 4
Ext. I/O 10
Ext. I/O 2
Ext. I/O 3
These pins are used
as serial input/output
lines, respectively.
Select "Serial" to use
RS-232C.
I
GSW Ext.I/O 6 Ext.I/O 15
The pin is used as an
IGSW input terminal.
To use the Ignition
Switch function,
select "IGSW."
A
FO Ext.I/O7 Ext.I/22
The pin is used as an
audio frequency
output terminal.
E
PTT Ext.I/O 14 Ext.I/O 19
The pin is used as an
external PTT input
line. When the pin is
activated, the External
PTT (EPTT) function is
turned ON.
Fixed to default
¾In/Out
Select Input and Output as the type of the assignable
function from Input and Output.
¾ Active Logic
The output power from the cable can be selected from
either ‘Low’ or ‘High’. This function is usable only when
I
n/Out is set to Output, and Function is set to any
options, except N
ull.
NOTE:
• External I/O 6 (15) is fixed to “High.”
• External I/O 11 (10) is fixed to “Low.”
Null
No function.
MCH Select : 1/2/3/4
This function enables memory channels to be selected
by an external signal. You need to program the pins on
the OPC-1939/2078 ACC CABLE to select from the
base channel number of "0".
You can assign combinations for up to 16 channels that
can be externally selected using the MCH Select
function.
The desired memory channel can be assigned to the
external channel numbers in the CH Switch Table sheet.
Function
Number in CH Switch
Table
MCH Select: 1 + 1
MCH Select: 2 + 2
MCH Select: 3 + 4
MCH Select: 4 + 8
Usable functions when In/Out is set to “Input” in
Ext.I/O.
¾Function
Selectable the port’s function as shown below
functions.
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