Yaesu FT-991 Operating Manual

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Contents

Page 133FT-991 O PERA T I N G M A N U A L092 AMS TX MODEFunction: Sets the operation of the AMS function.Available Values: AUTO/MANUAL/DN/VW/ANALOGDefault Setting: AUTODescription: When using the AMS (AUTO) function,the transceiver selects one of the three transmissionmodes automatically according to the received sig-nal.AUTO:Selects one of the transmission modes automati-cally according to the received signal.MANUAL:By briefly pressing the PTT switch, the operatingmode may be switched between digital and ana-log mode.DN:Transmits in DN mode.VW:Transmits in VW mode.ANALOG:Transmits in FM mode (analog).093 STANDBY BEEPFunction: Sets the Standby Beep function for digitalcommunications.Available Values: OFF/ONDefault Setting: ONDescription: During a digital communication, an audiblebeep sounds to indicate that the contact station hascompleted a transmission (Standby Beep function).094 RTTY LCUT FREQFunction: Sets the low-frequency cutoff audio filter inRTTY mode.Available Values: OFF/100Hz - 1000Hz (50Hz/step)Default Setting: 300HzDescription: This is the low-frequency cutoff audio filterin RTTY mode.The cutoff frequency can be set at 50 Hz incrementsbetween 100 Hz and 1000 Hz.095 RTTY LCUT SLOPEFunction: Sets the slope of the low-frequency cutoff au-dio filter in RTTY mode.Available Values: 6dB/oct / 18dB/octDefault Setting: 18dB/octDescription: Selects the slope setting of the low-fre-quency cutoff audio filter in RTTY mode.096 RTTY HCUT FREQFunction: Sets the high-frequency cutoff audio filter inRTTY mode.Available Values: OFF/700Hz - 4000Hz (50Hz/step)Default Setting: 3000HzDescription: This is the high-frequency cutoff audio fil-ter in RTTY mode.The cutoff frequency can be set at 50 Hz incrementsbetween 700 Hz and 4000 Hz.097 RTTY HCUT SLOPEFunction: Sets the slope of the high-frequency cutoff au-dio filter in RTTY mode.Available Values: 6dB/oct / 18dB/octDefault Setting: 18dB/octDescription: Selects the slope setting of the high-fre-quency cutoff audio filter in RTTY mode.098 RTTY SHIFT PORTFunction: Sets the SHIFT input jack for RTTY mode.Available Values: SHIFT/DTR/RTSDefault Setting: SHIFTDescription: Selects the SHIFT input jack for RTTYmode.SHIFT:Inputs from the RTTY/DATA jack (pin 4) on therear panel.DTR:Controls the signal from the USB virtual COM/DTR ports.RTS:Controls the signal from the USB virtual COM/RTS ports.099 RTTY POLARITY-RXFunction: Sets the shift direction for receiving in RTTYmode.Available Values: NOR/REVDefault Setting: NORDescription: Sets the shift direction for receiving inRTTY mode.NOR:The space frequency will be lower than the markfrequency.REV:The mark frequency will be lower than the spacefrequency.100 RTTY POLARITY-TXFunction: Sets the shift direction for transmitting inRTTY mode.Available Values: NOR/REVDefault Setting: NORDescription: Sets the shift direction for transmitting inRTTY mode.NOR:The space frequency will be lower than the markfrequency.REV:The mark frequency will be lower than the spacefrequency.M enu M oDe