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Operation Manual

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2
INSTALLATION AND CONNECTIONS
2-5
FSK and AFSK connections
The transceiver has a mode key for RTTY. You can use a PC and an application software to operate RTTY using a
USB cable. However, if you want to operate RTTY or other digital modes, you can use the ACC socket on the rear
panel through an interface unit. Refer to the software application’s instruction manual for setup details.
( Icom does not guarantee performance of the application software, PC, network device or network settings.)
(1) When using the USB port
Type B
To the
USB port
Type A
IC-7300
A user supplied A/B USB cable
PC
Install the RTTY
application software
To a USB port
TIP:
• If you set the “USB Serial Function” item to “RTTY Decode,” the decoded RTTY signals are output from the USB port.
MENU
» SET > Connectors > USB Serial Function
• You can download the USB driver and the installation guide from the Icom website.
http://www.icom.co.jp/world/index.html
(Support > Firmware Updates/Software Downloads > Transceiver)
(2) When using the ACC socket or the microphone connector
CE B
2 kΩ：2 kΩ 10 kΩ
2 kΩ：2 kΩ
10 kΩ
4.7 kΩ
RTS
GND
10 kΩ
10 kΩ
D-Sub 25
D-Sub 9
CE B
4.7 kΩ
TXD
*1
*1
*2
*2
A
B
C
D
E
1
2
3
4
5
6
7
8
B
E
D
C
F
E
A
D
C
B
SQL
q w e r
t y u i
o !0 !1 !2
!3
• When connecting to [ACC]
ACC
(Trimpot)
Shield cable
Shield cable
Shield cable
Shield cable
• When connecting to [MIC]
Shield cable
No connection
No connection
Connect to
LINE IN or
MIC IN
Connect to
SP OUT
Connect to
COM port
Pin 4
Pin 7
Pin 7
Pin 5
Pin 2 Pin 3
(Rear panel view)
(Front panel view)
NOTE: You can operate ONLY
AFSK RTTY when you connect
the circuit to the microphone
connector.
PC
*1 NPN transistor
(2SC1815)
*2 Switching diode
(1S1588)
(Trimpot)
Interface circuit
example for digital
modes
(User supplied)
The sections shown in short dashes are required only when Baudot RTTY is used in the FSK (RTTY) mode.
(Not requeired for other digital modes such as SSTV or PSK)
L See pages 18-2 to
18-3 for details on
the ACC socket and
MIC connector.
• ACC: Connect to [C]
• MIC: Connect to [F]