ICOM IC-703 Manual Do Utilizador

68

10

DATA COMMUNICATION

Before operating packet (AFSK) be sure to consult
the operating manual that came with your TNC.

qConnect a TNC and PC as left page.

wPush

[

(

Y)

BAND]/[

(

Z)

BAND] to select the desired

band

.

e

P

ush [MODE] momentarily to select SSB (LSB)

mode (or select SSB-D mode).

• After USB mode is selected, push [MODE] for 1 sec.

to toggle between USB and LSB modes.

• After RTTY mode is selected, push [MODE] for 1 sec.

to toggle between RTTY and SSB-D modes.

• Generally, LSB is used on the HF bands and FM is

used for the 50 MHz band.

r Rotate [AF] to set audio to a comfortable listening

level.

t Rotate the main dial to tune a desired signal.

• S-meter indicates received signal strength.

yTransmit your AFSK signals using your computer’s

keyboard.

• The TX indicator lights red.

NOTE: When connecting a TNC to the ACC socket
on the rear panel, select SSB-D mode or discon-
nect the microphone and adjust ‘MIC GAIN’ to 0 in
quick set mode.

When SSB-D mode is selected, the audio input
from the [MIC] connector is automatically cut, and
the audio input from the [ACC] is used.

M4 1/4 

TON

 AGC

[TX] indicator [MODE] Main dial

[AF]

[

Y]

[

Z]

“USB” or “LSB” blinks when 
SSB-D mode is selected.

■Packet (AFSK) operation

When operating AFSK in SSB mode, the indicated

frequency is the signals carrier point.

• Example— SSB-D mode

Mark freq.: 2125 Hz
Shift freq.: 200 Hz

2325 Hz

200 Hz

2125 Hz

Carrier point

(Displayed frequency)

DFrequency indication during AFSK operation