Icom IC-7410 Instruction Manual - Page 100

Packet AFSK operation - 11 meter mod

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11 DATA COMMUNICATION ■ Packet (AFSK) operation Before operating packet (AFSK), be sure to consult the operating manual that came with your TNC. q Connect the TNC and PC. (p. 92) w Select the desired band. (p. 25) e P ush [SSB] or [AM/FM] to select the desired oper- ating mode. r H old down the same key you pushed in step e for 1 second to select the Data mode. t R otate [DIAL] to select the desired frequency. y T ransmit your AFSK signals using your PC's key- board. • Rotate the [RF PWR] control to set the output power. • W hile using a TNC, the relative strength of the transmit- ted signal is indicated on the Po meter. • W hen operating in the SSB data mode, adjust the out- put power so that the ALC meter reading stays in the ALC zone. NOTE: When connecting the TNC to the ACC socket on the rear panel, select the USB, LSB, AM and FM data mode, or disconnect the microphone and ro- tate the [MIC] control fully counterclockwise. When the "DATA MOD" item is set to "ACC" (default) in the Set mode, and the data mode is selected, the audio input from the [MIC] connector is auto- matically cut. In that case, the audio input from the [ACC] socket is used. Also, when the data mode is selected, the fixed set- tings listed below are automatically selected; • Speech compressor : OFF • Transmit bandwidth : MID (Fixed to the default value; 300 Hz to 2700 Hz.) • Tx tone (Bass) : 0 • Tx tone (Treble) : 0 [SSB] [AM/FM] [DIAL] Appears when the data mode is selected. M1 AGC TON SCP D Frequency display during AFSK operation When operating AFSK in the SSB mode, the displayed frequency is the signal's carrier point. • Example- LSB/LSB data mode Mark freq.: 2125 Hz Shift freq.: 200 Hz 2325 Hz 200 Hz 2125 Hz Carrier point (Displayed frequency) 93

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93
DATA COMMUNICATION
11
■
Packet (AFSK) operation
Before operating packet (AFSK), be sure to consult the
operating manual that came with your TNC.
q
Connect the TNC and PC. (p. 92)
w
Select the desired band. (p. 25)
e
Push [SSB] or [AM/FM] to select the desired oper-
ating mode.
r
Hold down the same key you pushed in step
e
for
1 second to select the Data mode.
t
Rotate [DIAL] to select the desired frequency.
y
Transmit your AFSK signals using your PC’s key-
board.
• Rotate the [RF PWR] control to set the output power.
• While using a TNC, the relative strength of the transmit
-
ted signal is indicated on the Po meter.
• When operating in the SSB data mode, adjust the out
-
put power so that the ALC meter reading stays in the
ALC zone.
NOTE:
When connecting the TNC to the ACC socket
on the rear panel, select the USB, LSB, AM and FM
data mode, or disconnect the microphone and ro-
tate the [MIC] control fully counterclockwise.
When the “DATA MOD” item is set to “ACC” (default)
in the Set mode, and the data mode is selected,
the audio input from the [MIC] connector is auto-
matically cut. In that case, the audio input from the
[ACC] socket is used.
Also, when the data mode is selected, the fixed set-
tings listed below are automatically selected;
• Speech compressor
: OFF
• Transmit bandwidth
: MID
(Fixed to the default value;
300 Hz to 2700 Hz.)
• Tx tone (Bass)
:0
• Tx tone (Treble)
:0
• Example—
LSB/LSB data mode
Mark freq.: 2125 Hz
Shift freq.: 200 Hz
2325 Hz
200 Hz
2125 Hz
Carrier point
(Displayed frequency)
When operating AFSK in the SSB mode, the displayed
frequency is the signal’s carrier point.
D
Frequency display during AFSK operation
Appears when the data mode is selected.
[AM/FM]
[DIAL]
[SSB]