Icom IC-R75 Instruction Manual - Page 21

5 RECEIVE FUNCTIONS ■ CW reverse mode CW-R (CW Reverse) mode receives CW signals with a reverse side CW carrier point like that of LSB and USB modes. Use when interfering signals are near a desired signal and you want to change the interference tone. q P ush [CW/RTTY] once or twice to select CW mode. w P ush [CW/RTTY] for 2 sec. to toggle between CW and CW reverse (CW REV). • Check the interfering tone. • Receive audio tone response BFO 1/3 octave Push for 2 sec. CW/RTTY 1/2 octave BFO Desired signal Interference (600 Hz) (800 Hz) CW mode (USB side) Desired signal Interference (600 Hz) (400 Hz) CW REV mode (LSB side) ■ CW pitch control The received CW audio pitch and monitored CW audio can be adjusted to suit your preferences (300 to 900 Hz) without changing the operating frequency. The received CW audio pitch can be adjusted in 10 Hz steps. q Push [(ANT) SET] momentarily to enter set mode. w P ush [UP Y] or [Z DN] to select the 'CW PITCH' item. e R otate the tuning dial to set the desired CW audio pitch. • CW audio pitch is displayed in 10 Hz steps. '60' indicates 600 Hz CW audio pitch. r P ush [(ANT) SET] again to exit set mode. Shows a 600 Hz CW audio pitch ■ RTTY reverse mode Received characters are occasionally garbled when the receive signal is reversed between MARK and SPACE. This reversal can be caused by incorrect TNC connections, settings, commands, etc. To receive a reversed RTTY signal correctly, select RTTY reverse mode. q P ush [CW/RTTY] once or twice to select RTTY mode. w P ush [CW/RTTY] for 2 sec. to toggle between RTTY and RTTY reverse (RTTY REV). • Check the receive signal. 17