Data Mode (Afsk) Operation - Icom IC-7600 Instruction Manual

■ 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.
• Mark and Space tones of RTTY in the AFSK mode
operated in the LSB mode
2295 Hz
170 Hz
Mark Space Carrier frequency
2125 Hz
(displayed frequency)
RECEIVE AND TRANSMIT
Band keys
Main dial
SSB AM/FM
Appears
4
4
68