PRO-27 20-Channel Programmable Scanner (200-0507) Guide to Scanning Faxback Doc. # 31202 Reception of the frequencies covered by your scanner is mainly "line-of- sight." This means you usually cannot hear stations that are beyond the horizon. During the summer months, you might be able to hear stations in the 30-50 MHz range located several hundred or even thousands of miles away. This is because of summer atmospheric conditions. This type of reception is unpredictable but often very interesting! GUIDE TO FREQUENCIES National Weather Frequencies *161.650 MHz *162.440 MHz 162.525 MHz *161.775 MHz 162.450 MHz 162.550 MHz 162.400 MHz 162.475 MHz *163.275 MHz 162.425 MHz 162.500 MHz * Not programmed. GUIDE TO THE ACTION BANDS United States Broadcast Bands In the United States, there are several broadcast bands. The standard AM and FM bands are probably the most well known. There are also four television audio broadcast bands - the lower three transmit on the VHF band and the fourth transmits on the UHF band. Typical Band Usage VHF Band (30.0-300.0 MHz) Low Range..............................................30.00-50.00 MHz 6-Meter Amateur.........................................50.00-5400 MHz U.S. Government...................................137.00 - 144.000 MHz 2-Meter Amateur...................................144.00 - 148.000 MHz High Range........................................148.00 - 174.000 MHz UHF Band (300.00 MHz - 3.0 GHz) U.S. Government...................................406.00 - 420.000 MHz 70 cm Amateur.....................................420.00 - 450.000 MHz Low Range.........................................450.00 - 470.000 MHz FM-TV Audio Broadcast, Wide Band..................470.00 - 512.000 MHz Primary Usage As a general rule, most of the radio activity is concentrated on the following frequencies: VHF Band Activities........................................Frequencies Government, Police, and Fire.....................153.785 - 155.980 MHz Emergency Services...............................158.730 - 159.460 MHz Railroad.........................................160.000 - 161.900 MHz UHF Band Activities Frequencies Land-Mobile Paired Frequencies...................450.000 - 470.000 MHz Base Station.....................................451.025 - 454.950 MHz Mobile Units.....................................456.025 - 459.950 MHz Relay/Repeater Units.............................460.025 - 464.975 MHz Remote/Control Stations..........................465.025 - 469.975 MHz NOTE: Base stations and repeater units operate at 5 MHz lower than their associated mobile units and control stations. Specified Intervals Frequencies in different bands are accessible only at specific intervals. For example: Band Type Specified Interval VHF (Lo and Hi), HAM,............................5.0 or 50.0 kHz steps and Government...........................................5.0 kHz steps All Others....................................................12.5 kHz Aircraft................................................25.0 kHz steps FM Broadcast............................................50.0 kHz steps (SP 3/12/96)