Icom IC-7800 Instruction Manual - Page 71

4 RECEIVE AND TRANSMIT D Functions for the PSK decoder indication [F-3•AFC/NET] [F-6•MAIN/SUB] [F-7•WIDE] [F-2•HOLD/CLR] [RTTY/PSK] [EXIT/SET] • AFC/NET indications "AFC" and "NET" indicators Offset frequency q Push a band key to select the desired band. w Push [RTTY/PSK] to select PSK. • After PSK mode is selected, push [RTTY/PSK] for 1 sec. to toggle between PSK and PSK-R modes. • "PSK" or "PSK-R" appears. e Push [F-3•DECODE] to display the decoder screen. • When tuned into a PSK signal, decoded characters are displayed in the RX contents screen. r Push [F-2•HOLD/CLR] to freeze the current screen. • " HOLD " appears while the function is in use. • Push [F-2•HOLD/CLR] again to release the function. t Push [F-2•HOLD/CLR] for 1 sec. to clear the displayed characters. • " HOLD " indicator disappears at the same time when the hold function is in use. y Push [F-3•AFC/NET] to turn the AFC function ON. • " " appears. • If a PSK signal is received within the AFC tuning range, the decoder automatically tunes into the signal and the offset frequency is displayed. • The AFC tuning range is set to ±15 Hz as the default. Optional ±8 Hz setting is available in PSK decode set mode. (p. 2) NOTE: The AFC function may not tune the signal properly when a weak PSK signal is received. u Push [F-3•AFC/NET] again to turn the NET function ON. • " " appears additionally. i Push [F-3•AFC/NET] for 1 sec. to add the offset frequency to the displayed frequency. o Push [F-7•WIDE] to toggle the PSK decode screen size from normal and wide. • S/RF meter type during wide screen indication can be selected in display set mode. (pgs. 3-11, 12-11) !0 Push [F-6•MAIN/SUB] to toggle the MAIN and SUB band for decode operation. • Dualwatch function (p. 5-16) should be ON when SUB band is selected for decode operation. !1 Push [EXIT/SET] to close the PSK decode screen. D Setting the decoder threshold level Adjust the PSK decoder threshold level if some characters are displayed when no signal is received. q Call up the PSK decoder screen as described above. w Push [F-5•ADJ] to select the threshold level setting condition. e Rotate the main dial to adjust the PSK decoder threshold level. • Push [F-6•DEF] for 1 sec. to select the default setting. r Push [F-5•ADJ] to exit from the threshold level setting condition. 4-23