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Frequency Allocation Reference


Reception of the frequencies covered by your scanner is mainly "line of sight". That means you usually cannot hear stations that are beyond the horizon. During the summer months you may be able to hear stations in the 30-50 MHz range located several hundred or even thousand of miles away. This is because of summer atmospheric conditions. This type of reception is unpredictable but often very interesting!

ATTENTION: Your scanner may not be able to receive all frequencies and/or modes of reception that are contained within this document. For complete information of your scanner's capabilities, be sure to read your owner's manual completely. Mobile use of scanners may be unlawful in some areas or may require a permit-check with local authorities.


A NOTE ON IMAGE RECEPTION

Radios work by simple mathematics. For example, most tune to a frequency by mixing that frequency with another (local oscillator) frequency which is slightly different. This mixing process primarily gives us the two original frequencies, their sum, and their difference. Well, the radio's Intermediate Frequency (I.F.) filter normally passes either the sum or difference frequency, and this is then processed into the sound we hear. Because nothing is perfect, certain "harmonics" will also get through if they are strong enough. For example, if a radio's I.F. is 10.7 MHz, we might be able to tune to a frequency 21.4 MHz (2 x I.F.) above (or below, depending on the radio's design) a strong signal and hear it! This is more evident in a double-conversion radio than a triple-conversion radio, because the triple-conversion radio's 1st intermediate frequency is quite high. This causes the image to be so far off frequency that it is easy to effectively filter it out.

So remember that just because a radio doesn't receive something which another does is not necessarily an indication of a problem. The one radio may simply not be "tricked" into picking up an image! This rejection of undesired signals is one reason that a triple-conversion receiver costs more than a similar dual-conversion model.

You might be interested in finding more out about radio. One good location to start looking is your local public library. You might also wish to contact the A.R.R.L., as they are an excellent source of informative texts on the subject.

Contact:
Amateur Radio Relay League
225 Main St., Newington,
CT 06111-1494 USA


BANDS

High Frequency (HF) 3.0 - 30.0 MHz
Very High Frequency (VHF) 30.00 - 300.0 MHz
Ultra High Frequency (UHF) 300 MHz - 3 GHz

FREQUENCY CONVERSION
The tuning 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 by 1,000:
9.62 MHz x 1000 = 9620 kHz
To convert from kHz to MHz, divide by 1,000
2780 kHz / 1000 = 2.780 MHz
To convert MHz to meters, divide 300 by the number of megahertz
300 / 7.1 MHz = 42.25 meters


BAND ALLOCATION
To help you decide which frequency ranges to search, use the following listing of the typical services that use the frequencies your scanner receives. These frequencies are subject to change, and might vary from area to area.


NATIONAL WEATHER FREQUENCIES

(01) 161.650 (02) 161.775 (03) 162.400
(04) 162.425 (05) 162.440 (06) 162.450
(07) 162.475 (08) 162.500 (09) 162.525
(10) 162.550 (11) 163.275  

HAM RADIO FREQUENCIES
Ham operators often transmit emergency information when other communication methods break down.
The following chart shows some of the frequencies that Hams use:

10-meter 28.000-29.700
6-meter 50.000-54.000
2-meter 144.000-148.000
70-cm 420.000-450.000

CITIZENS BAND FREQUENCIES

(01) 26.965 (02) 26.975 (03) 26.985
(04) 27.005 (05) 27.015 (06) 27.025
(07) 27.035 (08) 27.055 (09) 27.065
(10) 27.075 (11) 27.085 (12) 27.105
(13) 27.115 (14) 27.125 (15) 27.135
(16) 27.155 (17) 27.165 (18) 27.175
(19) 27.185 (20) 27.205 (21) 27.215
(22) 27.225 (23) 27.255 (24) 27.235
(25) 27.245 (26) 27.265 (27) 27.275
(28) 27.285 (29) 27.295 (30) 27.305
(31) 27.315 (32) 27.325 (33) 27.335
(34) 27.345 (35) 27.355 (36) 27.365
(37) 27.375 (38) 27.385 (39) 27.395
(40) 27.405    

TYPICAL BAND USAGE


VHF Band

6-Meter Amateur 50.00 - 54.00 MHz
FM-TV Audio Broadcast, Wide Band 54.00 - 72.00 MHz
FM Radio Broadcast, Wide band 88.00 - 108.00 MHz
Aircraft 108.00 - 136.00 MHz
U.S. Government 138.00 - 144.00 MHz
2-Meter Amateur 144.00 - 148.00 MHz
High Range 148.00 - 174.00 MHz
New Mobile Narrow Band 220.00 - 222.00 MHz
1.3-Meter Amateur 222.00 - 225.00 MHz
Military Aircraft 225.00 - 287.80 MHz

UHF Band

Military Aircraft 311.00 - 384.00 MHz
U.S. Government 406.00 - 470.00 MHz
0.6-Meter Amateur 420.00 - 450.00 MHz
Land-Mobile Paired Frequencies 450.000-470.000 MHz
Base Stations 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
FM-TV Audio Broadcast, Wide Band 470.00 - 806.00 MHz
Conventional Systems 851.00 - 856.00 MHz
Conventional/Trunked Systems 856.00 - 861.00 MHz
Public Safety 866.00 - 869.00 MHz
Common Carrier 869.00 - 894.00 MHz
Private Trunked 935.00 - 940.00 MHz
General Trunked 940.00 - 941.00 MHz

ACTIVE FREQUENCIES
As a general rule, most of the radio activity is concentrated on the following frequencies:


High Frequency High Band - (25.00 - 27.36 MHz)

Industrial Services 25.020 - 25.320 MHz
Radio/TV Remote Broadcast Pickup 25.870 - 26.470 MHz
Civil Air Patrol 26.62 MHz
Citizens Band 26.966 - 27.405 MHz
Business 27.430 - 27.630 MHz

10-Meter Amateur Band

Amateur (HAM) Radio 28.000 - 29.700 MHz

VHF Low Band

Industrial Services 29.700 - 29.790 MHz
Federal Government/Military 29.900 - 30.550 MHz
Industrial/Public Services 30.580 - 31.980 MHz
Federal Government/Military 32.000 - 32.990 MHz
Industrial/Public Services/Business 33.020 - 33.980 MHz
Federal Government/Military 34.010 - 34.990 MHz
Industrial/Public Services/Business 35.020 - 35.980 MHz
Federal Government/Military 36.000 - 36.230 MHz
Oil spill clean up 36.250 MHz
Federal Government/Military 36.270 - 36.990 MHz
Industrial/Public Services 37.020 - 37.980 MHz
Federal Government/Military 38.000 - 39.000 MHz
Public Services 39.020 - 39.980 MHz
Federal Government/Military/Maritime 40.000 - 42.000 MHz
Police Department 42.020 - 42.940 MHz
Industrial Services 42.960 - 43.180 MHz
Tele. Maint./Industrial/Public Services 43.220 - 43.680 MHz
Transportation Services 43.700 - 44.600 MHz
Police Department/Public Services 44.620 - 46.580 MHz
Federal Government/Cordless Phones 46.600 - 46.990 MHz
Public Services 47.020 - 47.400 MHz
American Red Cross 47.420 MHz
Industrial/Public Services 47.440 - 49.580 MHz
Military/Cordless Phones 49.610 - 49.990 MHz

6-METER Amateur Band

Amateur (HAM) Radio 50.00 - 54.00 MHz

FM-TV Audio Broadcast, Wide Band

(TV 2) 59.750 MHz (TV 3) 65.750 MHz (TV 4) 71.750 MHz
(TV 5) 81.750 MHz (TV 6) 87.750 MHz  

Aircraft Band

AIR 108.000 - 121.490 MHz
AIR emergency 121.500 MHz
AIR 136.000 MHz

U.S. GOVERNMENT BAND

Federal Government/Military 137.000 - 144.000 MHz

VHF Band

Government, Police, and Fire 153.785-155.980 MHz
Emergency 158.730-159.460 MHz
Railroad 160.000-161.900 MHz

VHF-Hi Band

Military/Civil Air Patrol/MARS 148.050 - 150.345 MHz
Emergency/Medical Services 150.775 - 150.790 MHz
Tow Trucks 150.815 - 150.965 MHz
Oil spill clean up 150.980 MHz
Road Maintenance 150.995 - 151.130 MHz
Police Departments 151.145 - 151.475 MHz
Industrial Services/Business 151.490-151-955 MHz
Telephone Maint. 151.985 MHz
Mobile Telephones 152.030 - 152.240 MHz
Industrial Services/Taxi 152.270 - 152.465 MHz
Business 152.480 MHz
Mobile Telephones 152.510 -152.840 MHz
Industrial/Motion Picture Industry 152.870 - 153.020 MHz
Industrial/Oil Industry/Power & Water 153.035 - 153.175 MHz
Public Services/Fire Departments 153.740 - 154.445 MHz
Industrial Services/Business 154.490 - 154.570 MHz
Oil spill clean up 154.585 MHz
Business 154.600 - 154.625 MHz
Medical/Road Maint./Police/Public ser. 154.665 - 156.240 MHz
Oil/Petroleum Industry 165.255 MHz
Maritime Limited Class 156.275 - 157.425 MHz
Emergency/Medical Services 157.450 MHz
Tow Trucks 157.470 - 157.515 MHz
Industrial Services/Taxi 157.530 - 157.725 MHz
Business 157.740 MHz
Mobile Telephones 157.770 - 158.100 MHz
Business/Industrial/Oil/Tele/Utilities 158.130 - 158.460 MHz
Mobile Telephones 158.490 - 158.700 MHz
Police Department/Public Services 158.730 - 159.465 MHz
Oil/Petroleum Industry 159.480 MHz
Transportation Services 159.495 - 161.565 MHz
Oil/Petroleum Industry 161.580 MHz
Maritime/Radio-TV Remote Broadcast 161.600 - 162.000 MHz
Federal Government/Military/Classified 162.0125 - 162.35 MHz
Weather 162.400 - 162.550 MHz
Federal Government/Military/Classified 162.5625 - 162.6375 MHz
Emergency/Medical Services 162.6625 MHz
Federal Government/Military/Classified 162.6875 - 163.225 MHz
Emergency/Medical Services 163.250 MHz
Federal Government/Military/Classified 163.275 - 166.225 MHz
Govt/Radio-TV Remote/Fire 166.250 MHz
Federal Government/Interagency Fire 166.275 - 169.400 MHz
Wireless Mikes 169.445 MHz
Federal Government 169.500 MHz
Wireless Mikes 169.505 MHz
Federal Government/Military/Classified 169.55 - 169.9875 MHz
Boise (ID) Interagency Fire Cache 170.000 MHz
Government/Radio-TV Remote/Fire 170.025 - 170.150 MHz
Federal Government 170.175 - 170.225 MHz
Wireless Mikes 170.245 - 170.305 MHz
Federal Government/Military 170.350 - 170.400 MHz
Boise (ID) Interagency Fire Cache 170.425 - 170.450 MHz
Public Services 170.475 MHz
Government/Public/Wireless Mikes 170.4875 - 173.175 MHz
Motion Picture Industry/Relay Press/Util. 173.225 - 173.375 MHz
Military 173.3875 - 178.5375 MHz
Military/ Medical/Crash Crews 173.5625 - 173.5875 MHz
Federal Government 173.60 - 173.9875 MHz

FM-TV Audio Broadcast, VHF Wide Band

(TV 7) 179.750 MHz (TV 8) 185.750 MHz (TV 9) 191.750 MHz
(TV 10) 197.750 MHz (TV 11) 203.750 MHz (TV 12) 209.750 MHz
(TV 13) 215.750 MHz    

New Mobil Narrow Band

New Mobil Narrow Band 220.000 - 222.000 MHz

1.3-Meter Amateur Band

HAM 222.000 - 225.000 MHz

Military Aircraft Band

Coast Guard Search & Rescue 237.900 MHz
FAA Weather 239.800 MHz
ARMY 241.000 MHz
EMERGENCY 243.000 MHz
FAA FLIGHT SERVICE 255.400 MHz
CIVILIAN TOWERS 257.800 MHz
Coast Guard Air/Sea Rescue 287.800 MHz

Ultra High Frequency (UHF)


Military Aircraft Band

FAA Traffic Control 319.100 MHz
Air Force 321.000 - 336.600 MHz
FAA Weather 342.500 - 344.600 MHz
Air Force Traffic Control 346.400 - 364.200 MHz
Coast Guard 381.800 - 383.900 MHz

U.S. Government Band

Federal Government/Military/Classified 406.125 - 419.975 MHz

70-cm Amateur Band

Amateur (HAM) Radio 420.000 - 450.000 MHz

Low Band

Radio-TV Remote Broadcast Pickup 450.050 - 450.925 MHz
Industrial/Oil/Tele. Maint./Utilities 451.025 - 452.025 MHz
Industrial/Taxi/Trans/Towing/Relay 452.0375 - 453.00 MHz
Public Services 453.0125 - 453.9875 MHz
Oil/Petroleum Industry 454.000 MHz
Mobile Telephones 454.025 - 454.975 MHz
Radio-TV Remote Broadcast Pickup 455.050 - 455.925 MHz
Business 457.525 - 457.600 MHz
Emergency/Medical Services 458.025 - 458.175 MHz
Fire/Police/Public Services 460.0125 - 460.6375 MHz
Business 460.650 - 462.175 MHz
Business/Industrial Services 462.1875 - 462.450 MHz
Industrial/Oil/Tele. Maint./Utilities 462.4625 - 462.525 MHz
General Mobile Radio 462.550 - 462.725 MHz
Business 462.750 - 462.925 MHz
Emergency/Medical Services 462.9375 - 463.1875 MHz
Business 463.200 - 467.925 MHz

FM-TV Audio Broadcast, UHF Wide Band
(CHANNELS 14-69 IN 6 MHz STEPS)
Channel 14 475.750 MHz
Channel 15 481.750 MHz
Channel 16 487.750 MHz
..
..
..
..
..
Channel 69 805.750 MHz

Note: Some cities use the 470-512 MHz band for land/mobile service.

Studio-to-Transmitter Broadcast Links (944.00-952.00 MHz)

Private Fixed Services, Paging (952.00-960.00 MHz)


Specified Intervals
Frequencies in different bands are accessible only at specific intervals.
For example: VHF, HAM, and Government 5.0 kHz steps
All Others 12.5 kHz steps
Aircraft 25.0 kHz steps

NOTE: The scanner automatically rounds the entered frequency down to the closest valid frequency. For example, if you try to enter a frequency of 151.473, the scanner accepts it as 151.470.


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.

Frequency Range Allocation
54.0 - 72.0 MHz VHF Television
76.0 - 88.0 MHz VHF Television
88.0 - 108.0 MHz Standard FM
174.0 - 216.0 VHF Television
470.0 - 805.75 UHF Television


International Broadcast Bands
Several short-wave bands are allocated for international broadcasting because of the nature of propagation of high frequencies. The bands are sometimes identified according to the approximate wavelength of the signals in meters. Your scanner may receive the 11-meter band, from 25.6 - 26.10 MHz.

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