Yaesu FT-90R Operating Manual page 60

Menu System
33TONE
Function: Select the CTCSS/DCS Operation Mode.
Available Values: ENC, ENC/DEC, BELL, DCS, OFF
Default Setting: OFF
34TONEf
Function: Setting the CTCSS Tone Frequency.
Available Values: 39 standard CTCSS Tones
Default Setting: 100.0 Hz
35TOT
Function: Set the Time-Out Timer.
Available Values: 1 ~ 60 minutes or OFF
Default Setting: 6 minutes
36TxNar
Function: Reducing the MIC Gain.
Available Values: ON/OFF
Default Setting: OFF (Normal Deviation)
37TxPwr
Function: Set the Tx Output Power
Available Values: HIGH/MID1/MID2/LOW
Default Setting: HIGH
38AM
Function: Select the receiving mode.
Available Values: AUTO/ AM/INHIBIT
Default Setting: AUTO (AM in Aeronautical Bands, FM elsewhere)
Note:
The "Inhibit" option locks reception in the FM mode
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FT-90R O M
PERATING ANUAL