Icom IC-7600, Instruction Manual, Page: 77 / 196

68
4
RECEIVE AND TRANSMIT
4
■
Data mode (AFSK) operation
When operating RTTY, SSTV, AMTOR or PACKET
with your TNC and/or PC software in the AFSK mode,
consult the manual that comes with the TNC and/or
the software.
q
Connect a PC and TNC to the transceiver. (p. 23)
w
Push a band key to select the desired band.
e
Push
[SSB] or [AM/FM] to select the desired
operating mode.
r
Hold down
[SSB] or [AM/FM] that is pushed in
step
e
for 1 second to turn the data mode ON.
• One of “-D1,” “-D2” or “-D3” is additionally appears.
• During data mode selection, hold down
[SSB] or
[AM/FM] for 1 second to select data mode 1 (D1),
2 (D2) and 3 (D3) in sequence.
t
Rotate the main dial to tune to the desired signal
and decode it correctly.
• Also use the tuning indicator of the TNC or software.
• During the SSB data mode, the 1⁄4 tuning function can
be used for critical tuning.
y
Operate the PC (software) or TNC to transmit.
• When operating in the SSB data mode, adjust the TNC
output level so that the ALC meter reading doesn’t go
outside the ALC zone.
NOTE: When data mode is selected, the audio
input from the [ACC1] (pin 4) is used for
transmission instead of the [MIC]’s depending on
the set mode settings. Modulation input connector
can be changed in the ACC set mode. (p. 132)
The fixed condition is used for SSB data
transmission as follows:
• [COMP]
: OFF
• Tx bandwidth : MID*
• Tx Tone (Bass) : 0
• Tx Tone (Treble) : 0
* Fixed to the default value
(lower: 300, higher: 2700). (p. 130)
For your information
✓
Carrier frequency is displayed when the SSB data
mode is selected.
See the diagram to the right for the tone-pair example.
Main dial
Band keys
AM/FM
SSB
Appears
170 Hz 2125 Hz
2295 Hz
Mark Space Carrier frequency
(displayed frequency)
• Mark and Space tones of RTTY in the AFSK mode
operated in the LSB mode