Data Mode (Afsk) Operation - Icom IC-7700 Instruction Manual

■ Data mode (AFSK) operation

[AF]
SSB AM/FM
Appears
• Tone-pair example
200 Hz
Band keys
Main dial
DATA
2325 Hz
2125 Hz
Carrier frequency
(displayed frequency)
When operating AMTOR or PACKET with your TNC
and/or PC software, consult the manual that comes
with the TNC and/or the software.
q Connect a PC and TNC to the transceiver. (p. 2-9)
w Push a band key to select the desired band.
e Push or
SSB
erating mode.
r Push to turn data mode ON.
DATA
• One of "-D1," "-D2" or "-D3" is additionally appears.
• During data mode selection, push and hold
1 sec. 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 SSB data mode, the
used for critical tuning.
y Operate the PC (software) or TNC to transmit.
• When operating in 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 1 (D1) is selected, the
audio input from the [ACC1 (pin 4)] is used for
transmission instead of [MIC]'s.
connector can be changed in ACC set mode (pgs. 12-7,
12-8). DATA1: [ACC], DATA2: [MIC] and [ACC], DATA3:
[MIC] are defaut settings. )
The fixed condition is used for SSB data transmis-
sion as follows:
• [COMP]
• Tx bandwidth
• Tx Tone (Bass)
• Tx Tone (Treble) : 0
✔ For your information
Carrier frequency is displayed when SSB data mode
is selected.
See the diagram to the left for the tone-pair example.
4-35
RECEIVE AND TRANSMIT
to select the desired op-
AM/FM
⁄ tuning function can be
1
4
(Modulation input
: OFF
: MID
: 0
4
for
DATA