Kenwood TM-641A Instruction Manual

Also see for TM-641A: Instruction manual Service manual

4-3-3. Time-Out Timer (TOT)The transceiver has a time-out timer function to preventpossible problems caused by continuous transmission.This function forcibly stops continuous transmissionafter a certain time.The time-out time is 3, 5, 10, 20, or 30 minutes or OFF(no limit).1. Press the F key for longer than 1 second.2. The F indicator will begin to flash. Press the LOWkey. The current Time-out time is displayed.(Forexample 30)¥ee io4s 5000 3aLow —— =3. Select the desired time-out time by rotating thetuning control. The TOT indicator will light. (If thetime-out time is set to OFF, the TOT indicator willnot light.). Press the LOW key. The time-out timer is now on.>A beep sounds when the time-out timer times out duringtransmission. The receive state is then re-entered. Pressthe PTT switch to resume transmission.284-3-4. Bandwidth Selection(Requires optional band unit UT-28)You can select WIDE or NARROW bandwidth onlywhen transmitting in the 283MHz band.Press andholdtheFkeyandtheLOWkey, thenturnthePOWERswitchON.ThiswilltogglebetweenWIDEandNARROW.WhenNARROWisselected“n“willdisplayattheheadofthefrequencydisplay.———a26.5UUBUSYS&RAF—1—s5—_3s—_NARROW indicator