Icom IC-7100 Advanced Instructions - Page 341
Packet (AFSK) operation, Frequency display during AFSK operation - alc mod
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Previous view 18 DATA COMMUNICATION Packet (AFSK) operation Before operating packet (AFSK), be sure to consult the operating manual that came with your TNC. qqConnect the TNC and PC. (p. 18-2) wwSelect the desired band. (p. 3-6) eeSelect the Data mode of SSB, AM or FM. (p. 3-17) rrRotate the Dial to tune the desired signal and de- code it correctly by using the tuning indicator of the TNC or software. • W hen a signal is received, the S-meter is displayed ac- cording to the signal strength level. • In the SSB data mode, the ¼ tuning function can be used for critical tuning. (p. 3-10) ttOperate the PC (software) or TNC to transmit. • W hen operating in the SSB data mode, adjust the TNC output level so that the ALC meter reading doesn't go outside the ALC zone. Frequency display during AFSK operation When operating AFSK in the SSB mode, the displayed frequency is the signal's carrier point. • Tone-pair example HF band/LSB data mode Mark frequency: 2125 Hz Shift frequency: 200 Hz 2325Hz 200Hz 2125Hz Carrier point (Displayed frequency) NOTE: When the data mode is selected, the audio input from the [MIC] connector is automatically cut, and the audio input from the [ACC] socket is used as the default.*1 Also, when the data mode is selected, the fixed settings listed below are automatically selected: • Speech compressor: OFF • Transmit bandwidth: MID*2 • Tx tone (Bass): 0 • Tx tone (Treble): 0 *1Select the connector(s) for the desired modulation to input in the "DATA MOD" item of the Set mode. (p. 17-24) *2Fixed to the default value of 300 Hz to 2700 Hz. Appears when the data mode is selected. 18-3