Icom IC-905 Advanced Manual page 214

16
ADVANCED CONNECTIONS
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/
When using the [MIC-SP] jack, [MIC] jack, and [SEND] jack
A B
3�5 mm (1/8 inch)
Connecting to [MIC-SP]
CD
2�5 mm
Connecting to [MIC]
E F
3�5 mm (1/8 inch)
Connecting to [SEND]
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 off.
To a USB port
PC
A
Shield cable
B
C
Shield cable
D
E
F
E C
* NPN transistor
1
(2SC1815)
USB cable
To the [USB] port
Interface circuit example for digital modes (User supplied)
2kΩ : 2kΩ 10kΩ Shield cable
10kΩ
(Trimpot)
Shield cable
2kΩ : 2kΩ
10kΩ
10kΩ
(Trimpot)
*
1
Shield cable
D-Sub25
B
4�7kΩ
*
2 RTS
Pin 4
GND
Pin 7
* Switching diode
2
(1S1588)
16-2
Connect to
LINE IN or
MIC IN
No connection
Connect to
SP OUT
No connection
D-Sub9
Pin 7
Pin 5
Connect to
COM port
PC