Page 58FT-991 O PERA T I N G M A N U A LA djuStAble receiver A udio FilterThe FT-991 includes an adjustable receiver audio filter, that provides precise, independent control of the low; and upperaudio ranges.tools for coMfortable anD effective reception1. Press the MENU button to enter the Menu mode.2. Rotate the MULTI knob to find Menu items “041”through “044” these parameters apply to the adjust-ment of the receiver audio filter in the AM mode,Menu items “050” through “053” apply to theadjustment of the RX audio filter in the CW mode,Menu items “066” through “069” apply to the ad-justment of the RX audio filter in the DATA mode,Menu items “094” through “097” apply to the ad-justment of the RX audio filter in the RTTY mode,and Menu items “104” through “107” apply to theadjustment of the RX audio filter in the SSB mode3. Touch [SELECT] on the LCD.MULTI KnobMENU ButtonF$QEV#/ .% 67 '(4 3#/ .% 67 15. 2'#/ *% 67 '(4 31((1(( 4. Rotate the MULTI knob to adjust the receiver audioresponse as desired.5. Touch [ENTER] on the LCD to save the new set-ting.F$QEV#/ .% 67 '(4 3#/ .% 67 15. 2'#/ *% 67 '(4 31((*\ 6. Press the MENU button or touch [BACK] on theLCD to exit to normal operation.M ode M enu iteM A vAilAble vAlueSAM041 AM LCUT FREQ OFF/100(Hz) - 1000(Hz)042 AM LCUT SLOPE 6dB/oct / 18dB/oct043 AM HCUT FREQ 700(Hz) - 4000(Hz)/OFF044 AM HCUT SLOPE 6dB/oct / 18dB/octCW050 CW LCUT FREQ OFF/100(Hz) - 1000(Hz)051 CW LCUT SLOPE 6dB/oct / 18dB/oct052 CW HCUT FREQ 700(Hz) - 4000(Hz)/OFF053 CW HCUT SLOPE 6dB/oct / 18dB/octDATA066 DATA LCUT FREQ OFF/100(Hz) - 1000(Hz)067 DATA LCUT SLOPE 6dB/oct / 18dB/oct068 DATA HCUT FREQ 700(Hz) - 4000(Hz)/OFF069 DATA HCUT SLOPE 6dB/oct / 18dB/octRTTY094 RTTY LCUT FREQ OFF/100(Hz) - 1000(Hz)095 RTTY LCUT SLOPE 6dB/oct / 18dB/oct096 RTTY HCUT FREQ 700(Hz) - 4000(Hz)/OFF097 RTTY HCUT SLOPE 6dB/oct / 18dB/octSSB104 SSB LCUT FREQ OFF/100(Hz) - 1000(Hz)105 SSB LCUT SLOPE 6dB/oct / 18dB/oct106 SSB HCUT FREQ 700(Hz) - 4000(Hz)/OFF107 SSB HCUT SLOPE 6dB/oct / 18dB/oct