Icom IC-2820H Instruction Manual - Page 142
bps high speed packet operation
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15 OTHER FUNCTIONS D 9600 bps high speed packet operation The transceiver supports 2 modes of 9600 bps packet operation: G3RUH and GMSK. q Connect the transceiver and a TNC as illustrated below. q DATA IN TNC side TX AUDIO w GND GND e PTT P r DATA OUT y P SQL RX AUDIO PTT SQL w G3RUH mode can handle 16 kinds of modulated wave forms in order to maintain a communication link. e Set transmit delay on the TNC to 50-100 msec., if available. r Adjust the TNC frequency deviation if necessary (see page at right). • When using the PTT P terminal for packet operation, no voice signals are transmitted from the microphone. • When pushing [PTT] during data transmission, data transmission is interrupted and the voice signal takes priority. • Read the instructions supplied with your TNC carefully before attempting packet operation with the transceiver. • Pin r DATA OUT is for 9600 bps operation only. This pin cannot be used for 1200 bps operation. 121