Radio Shack Desktop Scanner Owner's Manual

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27Guide to the Action Bands462.9375–463.1875 ........................................................................................................... MED463.200–467.925 ................................................................................................................ BUSFM-TV Audio Broadcast, UHF Wide Band (470–512 MHz)(Channels 14 through 20 in 6 MHz steps)475.750 .................................................................................................................... Channel 14481.750 .................................................................................................................... Channel 15487.750 .................................................................................................................... Channel 16493.750 .................................................................................................................... Channel 17499.750 .................................................................................................................... Channel 18505.750 .................................................................................................................... Channel 19511.750 .................................................................................................................... Channel 20Note: Some cities use the 470–512 MHz band for land/mobile service.AVOIDING IMAGE FREQUENCIESYou might discover one of your regular stations on another frequency that is not listed. It mightbe what is known as an image frequency. For example, you might find a service that regularlyuses a frequency of 453.275 also on 474.675.To see if it is an image, do a little math.Note the new frequency. 474.675Double the intermediate frequency of 10.7 MHz (21.400)and subtract it from the new frequency. –21.400If the answer is the regular frequency, 453.275then you have tuned to an image.Occasionally, you might get interference on a weak or distant channel from a strong broadcast21.4 MHz above or below the tuned frequency. This is rare, and the image signal is usuallycleared whenever there is a broadcast on the actual frequency.FREQUENCY CONVERSIONThe tuning location of a station can be expressed in frequency (kHz or MHz) or in wavelength(meters). The following information can help you make the necessary conversions.1 MHz (million) = 1,000 kHz (thousand)To convert MHz to kHz, multiply the number of MHz by 1,000:30.62 MHz × 1000 = 30,620 kHzTo convert from kHz to MHz, divide the number of kHz by 1,000.127,800 kHz ÷ 1000 = 127.8 MHzTo convert MHz to meters, divide 300 by the number of MHz.300 ÷ 50 MHz = 6 meters