4-4_ MEMORY4 -4-1 . Microprocessor Memory Back-upCAUTIONTHE MEMORY IS MAINTAINED BY A RECHARGE-ABLE SECONDARY LITHIUM BATTERY. WITH THEBATTERY CASE REMOVED, THE MEMORY IS RE-SET TO ITS INITIAL STATE AFTER ABOUT 20DAYS. A FULLY DISCHARGED BATTERY WILL RE -QUIRE APPROX. 10 HOURS TO REACH FULLCHARGE AFTER INSTALLING A NiCd BATTERYPACK OR AN EXTERNAL POWER SUPPLY.4-4 -2. Microprocessor InitializationThe initial state of the microprocessor. as delivered fromthe factory is shown in the chart below.TH-27A TH-27E TH-47A TH-47EVFOf . 144 MHz 144 MHz 440MHz 430 MHzCall CHf. step 5 kHz 12.5 kHz 25 kH z 25 kHzTone 88.5 Hz (,; ' ) 1750 Hz 88.5 Hz(·:- ) 1750 Hzfrequency(*l Only when the CTCSS un it TSU-7 IS insta ll ed .• Memory ResetI MEMORY RESET IPress and ho ld the M key and turn on the POWER switch.All the LCD indicator may light. Release the M key. Al luser programmed data will be initialized.IVFO RESETIPress and hold the ENTER key and turn on the POWERswitch to reset the microprocessors VFO memory.without destroying the memory channel. automatic di-aler DTMF memory channel. Programmable VFO tuningrange. or call channel data.4 -4 -3 . Memory ChannelThis transceiver provides 40 memory channels .In addition to serving as a normal memory channelMemory Channel l is used to store the frequency for thePriority Alert function.4-4-4 . Memory ContentsEach memory channel is capable of storing the followinginformation;19