Icom IC-905 - FSK and AFSK connections

16
ADVANCED CONNECTIONS
16-2
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� See the interface circuit diagram below for details� Refer to the software application’s instruction
manual for setup details�
(Icom does not guarantee the performance of the application software, PC, network device, or network settings�)
When using the USB port
TIP:
• To operate RTTY through your PC’s USB port, set the following item�
»
SET > Connectors > USB SEND/Keying
• Download the USB driver and the installation guide from the Icom website�
https://www.icomjapan.com/support/
TIP: We recommend using the SEND terminal on the [SEND] jack to switch between transmit and receive�
If you use the PTT terminal on the [MIC] jack, the data may be cut o󰀨.
When using the [MIC-SP] jack, [MIC] jack, and [SEND] jack
PC
CE B
Connect to
LINE IN or
MIC IN
Connect to
SP OUT
No connection
No connection
Shield cable
Shield cable
Shield cable
2kΩ : 2kΩ 10kΩ
2kΩ : 2kΩ
10kΩ
4�7kΩ
RTS
GND
10kΩ
(Trimpot)
10kΩ
(Trimpot)
Connect to
COM port
D-Sub25
D-Sub9
Pin 4
Pin 7
Pin 7
Pin 5
Shield cable
Shield cable
*
1
NPN transistor
(2SC1815)
*
2
Switching diode
(1S1588)
*
1
*
2
F
D
C
A
B
2�5 mm
Connecting to [MIC]
CD
E
3�5 mm (1/8 inch)
Connecting to [SEND]
FE
3�5 mm (1/8 inch)
Connecting to [MIC-SP]
BA
USB cable
To the [USB] port
To a USB port
PC
Interface circuit example for digital modes (User supplied)