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to the different frequencies in them. The second mode ofto the different frequencies in them. The second mode of operation is the SCAN facility whereby up to 100frequencies are manually put in the memories and thenrapidly scanned. Should there be a signal present, theAR9ooUK will stop scanning to permit the signal to beheard. The 100 memories are in 5 (A,B,C,D,and E) banksof 20 and any bank or combination of banks may bescanned. One popular method of use is to have local airfieldand airways frequencies in one bank, Radio Amateurs inanother, Private Mobile Radio in a third, cellular car'phones in a fourth and so on, scanning the bank. or banksof current interest. Should interest in one or morefrequencies temporarily wane, that frequency or frequenciesmay be temporarily locked out by pressing theLOCKOUT/INC key. Pressing a second time brings thefrequency back. into the scan. The SCAN operationpresupposes that the user knows firstly what frequencies toput in the memories and secondly whether the transmissionis AM or FM. There are several books which list variousfrequencies and your Dealer will be happy to advise. As towhether a transmission is AM or FM, a good general rule isthat all airband, civil and military are AM, anything else isFM, but if in doubt, trying both will determine which iscorrect. For the beginner who has little or no idea of whatfrequencies are in general use in his area, the third mode ofoperation comes into its own. This is the search mode, andin this mode the AR9ooUK will scan between twoprogrammable limits, stopping wherever there is a signal.Anexample of this mode of operation was given at the start ofthis manual. A good starting point is to consult the “BandPlan” listed further on and decide what you would like tolisten to. Take a small portion of the band and search thatportion noting any interesting frequencies or putting themdirectly into a memory bank by use of the HOLD facilitydescribed later. Having exhausted the possibilities of thatparticular portion, repeat over the next portion, and so on,not attempting to search more than a'1MHz portion at atime, otherwise there is a strong possibility that sometransmissions will be missed. After 20 frequencies have beenentered into a memory bank, it will, of course, be necessaryto start a fresh bank.