Yaesu FT-991 Operating Manual

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Contents

Page 128FT-991 O PERA T I N G M A N U A L039 REF FREQ ADJFunction: Adjusts the reference oscillator.Available Values: −25 - 0 - 25Default Setting: 0Description: The frequency may be calibrated whenconnecting a frequency counter to the transceiver, orwhen receiving a standard frequency such as WWVor WWVH.040 CLAR MODE SELECTFunction: Selects the clarifier operation.Available Values: RX/TX/TRXDefault Setting: RXDescription: Selects the clarifier operation when theCLAR button is pressed.RX:Functions as the RX clarifier which changes onlythe receiver frequency without changing transmitfrequency.TX:Functions as the TX clarifier which changes onlythe transmit frequency without changing the re-ceiver frequency.TRX:Functions as the TRX clarifier which changes thetransmit frequency and the receiver frequencysimultaneously.041 AM LCUT FREQFunction: Sets the low-frequency cutoff audio filter inAM mode.Available Values: OFF/100Hz - 1000Hz (50Hz/step)Default Setting: OFFDescription: This is the low-frequency cutoff audio filterin AM mode.The cutoff frequency can be set at 50 Hz incrementsbetween 100 Hz and 1000 Hz.042 AM LCUT SLOPEFunction: Sets the slope of the low-frequency cutoff au-dio filter in AM mode.Available Values: 6dB/oct / 18dB/octDefault Setting: 6dB/octDescription: Selects the slope of the low-frequency cut-off audio filter in AM mode.043 AM HCUT FREQFunction: Sets the high-frequency cutoff audio filter inAM mode.Available Values: OFF/700Hz - 4000Hz (50Hz/step)Default Setting: OFFDescription: This is the high-frequency cutoff audio fil-ter in AM mode.The cutoff frequency can be set at 50 Hz incrementsbetween 700 Hz and 4000 Hz.044 AM HCUT SLOPEFunction: Sets the slope of the high-frequency cutoff au-dio filter in AM mode.Available Values: 6dB/oct / 18dB/octDefault Setting: 6dB/octDescription: Selects the slope of the high-frequency cut-off audio filter in AM mode.045 AM MIC SELECTFunction: Selects the microphone input jack for AMmode.Available Values: MIC/REARDefault Setting: MICDescription: Selects the microphone input jack to beused in AM mode.FRONT:Audio is input from the MIC jack on the frontpanel.DATA:Disables the microphone circuit on the frontpanel and inputs audio/data from the USB jackor RTTY/DATA jack on the rear panel.046 AM OUT LEVELFunction: Sets the level of the receive AM signal outputfrom the RTTY/DATA jack.Available Values: 0 - 100Default Setting: 50047 AM PTT SELECTFunction: Sets the PTT control for the AM transmit sig-nal.Available Values: DAKY/RTS/DTRDefault Setting: DAKYDescription: Selects the PTT control method for the AMtransmit.DAKY:Controls the AM transmit signal from the RTTY/DATA jack (pin 3) on the rear panel.DTR:Controls the AM transmit signal from the USBvirtual COM/DTR ports.RTS:Controls the AM transmit signal from the USBvirtual COM/RTS ports.048 AM PORT SELECTFunction: Selects the input jack of the AM signal.Available Values: DATA/USBDefault Setting: DATADescription: Selects the input jack of the AM signalwhen “045 AM MIC SELECT” is set to “DATA”.DATA:Inputs from the RTTY/DATA jack on the rearpanel.USB:Inputs from the USB jack on the rear panel.M enu M oDe