Operating Rtty; D Connections For Rtty (Fsk); D Rtty (Fsk) Operation - Icom IC-718 Advanced Manual

2
ADVANCED OPERATIONS

Operating RTTY

D Connections for RTTY (FSK)

IC-718 (Rear panel)
[ACC]
(Rear panel view)
9 10 11 12
5 6 7 8
1 2 3 4

D RTTY (FSK) operation

1� Select the RTTY mode by pushing [MODE]�
L Hold down [MODE] for 1 second to select RTTY-R
(reverse) mode, if necessary�
2� Select the desired tone and shift frequencies�
3� Set the desired operating frequency by rotating
[MAIN DIAL]�
4� Start using the PC or TNC (TU)�
Presetting for RTTY
Before operating RTTY, set the following items in the
Quick Set mode�
1� Hold down [SET] for 1 second to enter the Quick
Set mode�
2� Push [UP▲]/[▼DN] to select a setting item.
3� Rotate [MAIN DIAL] to set a value�
• Tone frequency "TON 2125"
Select a tone frequency�
• Shift frequency "SIFT 170"
Select the desired shift frequency�
4� Push [SET] to exit the Quick Set mode�
RTTY reverse mode
Received characters are occasionally garbled when
the receive signal is reversed between MARK and
SPACE� This reversal can be caused by incorrect
TNC connections, settings, commands and so on�
To receive a reversed RTTY signal correctly, select
the RTTY-R (RTTY reverse) mode�
• is displayed when the RTTY reverse mode is
selected�
[EXT SP]
2 conductor 3�5 mm (1/8 in) plug
AF GND
13
SQL* 1
AF out
SEND
GND
FSK
TU or TNC
Use either the ACC or one of the two
*1 Connect the SQL line, if necessary�
Normal
mark
space
2125
170
Hz
Hz
Displayed frequency
2-8
PC
1 / plugs�
8
RTTY mode
RTTY tone frequency
L2125, 1615, or 1275
(Hz) can be set�
RTTY shift frequency
850, 425, 200, or 170
(Hz) can be set�
Reverse
space
2125
Hz
BFO BFO
Displayed frequency
mark
170
Hz