4 RECEIVE AND TRANSMIT4-13The functions for RTTY operationD About RTTY reverse modeReceived characters are occasionally garbled whenthe Mark and Space signals are reversed. This reversalcan be caused by incorrect TNC connections, settingor commands.To correctly receive reversed RTTY signals, select theRTTY reverse mode.On the Mode selection screen, touch “RTTY” to se-qlect the RTTY mode.After the RTTY mode is selected, touch “RTTY” againwon the Mode selection screen, toggles between thenormal and reverse modes.• “RTTY-R” appears when the RTTY reverse mode is se-lected.D Twin Peak FilterThe Twin Peak Filter changes the receive frequency re-sponse by boosting 2125 and 2295 Hz for better copy-ing of RTTY signals.In the RTTY mode, pushq MENU (C) one or moretimes to select the “M-2” screen (Menu M-2).Touch [RTTY](w D) to display the “RTTY SET”screen.Touch the “Twin Peak Filter” item to select.eTouch “ON” to turn ON the Twin Peak Filter.rTouch [t ](D) or push MENU (C) to return to the“M-2” screen (Menu M-2).NOTE: When the Twin Peak Filter is in use, the re-ceived audio output may increase. This is normal;not a malfunction.Normal Reverse170 Hz170 Hz 2125 Hz2125 HzBFOBFO SpaceSpace MarkMarkLeft RightCenterDisplay The L, R, C or D in theinstructions indicate thepart of the controller.L: Left sideR: Right sideC: Center bottomD: Display (Touch screen)Touch [RTTY]Touch “TwinPeak Filter”Touch “ON”
