Icom IC-R75 Instruction Manual

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Icom IC-R75 Instruction Manual Manual pdf 21 page image

175RECEIVE FUNCTIONS■ CW reverse modeCW-R (CW Reverse) mode receives CW signals witha reverse side CW carrier point like that of LSB andUSB modes.Use when interfering signals are near a desiredsignal and you want to change the interference tone.q Push [CW/RTTY] once or twice to select CWmode.w Push [CW/RTTY] for 2 sec. to toggle between CWand CW reverse (CW REV).• Check the interfering tone.• Receive audio tone response■ RTTY reverse modeReceived characters are occasionally garbled whenthe receive signal is reversed between MARK andSPACE. This reversal can be caused by incorrectTNC connections, settings, commands, etc.To receive a reversed RTTY signal correctly, selectRTTY reverse mode.q Push [CW/RTTY] once or twice to select RTTYmode.w Push [CW/RTTY] for 2 sec. to toggle betweenRTTY and RTTY reverse (RTTY REV).• Check the receive signal.■ CW pitch controlThe received CW audio pitch and monitored CWaudio can be adjusted to suit your preferences (300to 900 Hz) without changing the operating frequency.The received CW audio pitch can be adjusted in 10Hz steps.q Push [(ANT) SET] momentarily to enter set mode.w Push [UP Y] or [Z DN] to select the ‘CW PITCH’item.e Rotate the tuning dial to set the desired CW audiopitch.• CW audio pitch is displayed in 10 Hz steps. ‘60’indicates 600 Hz CW audio pitch.r Push [(ANT) SET] again to exit set mode.BFO1/3 octavePush for 2 sec.Desired signal(600 Hz)CW mode (USB side)Interference(800 Hz)BFO1/2 octaveDesired signal(600 Hz)CW REV mode (LSB side)Interference(400 Hz)CW/RTTYShows a 600 Hz CW audio pitch