Icom IC-9100 Instruction Manual - Page 181

15 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. 171) w Select the desired band. (p. 35) e P ush [SSB] or [AM/FM] to select the desired oper- ating mode. (p. 43) r H old down the same key you pushed in step e to select the Data mode. t R otate [MAIN DIAL] to select the desired fre- quency. y T ransmit your AFSK signals using your PC's key- board. • Rotate [RF POWER] 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 [MIC GAIN] 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] [MAIN DIAL] Appears when the FM data mode is selected. M1 AGC DUP AFC 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) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 172