220 lines
7.3 KiB
Plaintext
220 lines
7.3 KiB
Plaintext
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Surveillance Frequency Selection
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COPYRIGHT (C) 1991 BY FULL DISCLOSURE. ALL RIGHTS RESERVED.
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This article will over techniques of selecting frequency for surveillance
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use. This information pertains to lawful surveillance by State and Local
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government agencies. Federal agencies are not bound by FCC regulations. Those
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not intending to use the technical surveillance information in a criminal
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prosecutor might be more apt to hide their operation by using a more obscure
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frequency.
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The information herein has been derived from ``A Guide For Establishing
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Electronic Surveillance Operations,'' distributed by Audio Intelligence
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Devices, 1400 NW 62d St, Ft Lauderdale, Florida 33309. Phone: (305) 776-5000,
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Fax: (305) 776-5005 at the NATIA conference.
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The starting point is the examination of FCC regulations that relate to
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surveillance radio operation. FCC Regulation 90.19(g)(3):
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``A licensee may use, without special approval from the Commission, any
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mobile service frequency between 40 and 952 MHz listed in Subpart B of this
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part of the Rules, for communications in connection with physical
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surveillance, stakeouts, raids and other such activities. Such use shall be
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on a secondary basis to the operations of licensees regularly authorized on
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the assigned frequencies. The maximum output power that may be used for such
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communications is 2 watts. Transmitters operating under this provision of the
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Rules, shall be exempted from the station identification requirements, of
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Section 90.425. Use of Public Safety frequencies not listed in paragraph (d)
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of this section is conditional on the approval of the coordinator
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corresponding to each frequency...''
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Three suggestions on selecting a frequency to use within these specifications
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are provided:
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1) Contacting the Association of Public Communication Officers (APCO)
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frequency coordinator and reviewing the options for your area,
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2) Using a mobile police scanner to search through the VHF band and make a
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list of the used and unused frequencies in your area. Any of the unused ones
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that meet the FCC requirements would be usable, or
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3) Deriving a list of unused frequency from a police frequency directory and
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then using a scanner to make sure they are in fact open.
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After selection of a frequency or frequencies, a surveillance user has to
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remain aware that it could be assigned to someone in the future requiring
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reselection of a surveillance frequency.
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Surveillance transmitters used for tracking purposes (vehicle, person, etc)
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have a different set of requirements to fulfil. In addition to power output
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requirements, there are stricter frequency requirements and the transmitters
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must have a ``positive means'' to limit the transmission time to no more than
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10 days. The use of battery life is an allowable method to control
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transmission time.
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Tracking transmitters are required to operate in the following frequency
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ranges:
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150.999 - 151.490 MHz<R>
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153.740 - 154.445 MHz<R>
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154.635 - 155.195 MHz<R>
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155.415 - 156.250 MHz<R>
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158.715 - 159.465 MHz
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The following public safety radio frequencies have been allocated by the FCC
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for the following services:
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Police
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154.650 154.665 154.680<R>
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154.695 154.710 154.725<R>
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154.740 154.770 154.785<R>
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154.800 154.815 154.830<R>
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154.845 154.860 154.875<R>
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154.890 154.905 154.920<R>
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154.935 154.950 155.010<R>
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155.070 155.130 155.190<R>
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155.250 155.310 155.370<R>
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155.415 155.430 155.445<R>
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155.460 155.475 155.490<R>
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155.505 155.535 155.550<R>
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155.580 155.595 155.610<R>
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155.625 155.640 155.655<R>
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155.670 155.685 155.700<R>
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155.730 155.790 155.850<R>
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155.910 155.970 156.030<R>
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156.090 156.150 156.210<R>
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158.730 158.790 158.850<R>
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158.910 159.030 159.090<R>
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159.150 159.210
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Local Government
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153.740 153.755 153.785<R>
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153.800 153.815 153.845<R>
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153.860 153.875 153.905<R>
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153.920 153.935 153.965<R>
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153.980 153.995 154.025<R>
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154.040 154.055 154.085<R>
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154.100 154.115 154.45625<R>
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154.46375 154.47175 154.47875<R>
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154.965 154.980 154.995<R>
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154.025 154.040 154.055<R>
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154.085 155.100 155.115<R>
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155.145 155.715 155.745
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155.760 155.775 155.805<R>
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155.820 155.835 155.865<R>
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155.880 155.895 155.925<R>
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155.940 155.955 155.985<R>
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156.000 156.015 158.745<R>
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158.760 158.775 158.805<R>
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158.820 158.835 158.865<R>
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158.880 158.895 158.925<R>
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158.940 158.955 173.20375<R>
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173.210 173.2375 173.2625<R>
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173.2875 173.3125 173.3375<R>
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173.3625 173.390 173.39625
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Fire
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153.770 153.830 153.890<R>
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153.950 154.010 154.070<R>
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154.130 154.145 154.160<R>
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154.175 154.190 154.205<R>
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154.220 154.235 154.250<R>
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154.265 154.280 154.295<R>
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154.310 154.325 154.340<R>
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154.355 154.370 154.385<R>
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154.400 154.415 154.430<R>
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154.445 166.250 170.150
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Highway Maintenance
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150.995 151.010 151.025<R>
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151.040 151.055 151.070<R>
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151.085 151.100 151.115<R>
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151.130 156.045 156.060<R>
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156.075 156.105 156.120<R>
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156.135 156.165 156.180<R>
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156.195 156.225 156.240<R>
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157.050 157.110 158.985<R>
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159.000 159.015 159.045<R>
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159.060 159.075 159.105<R>
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159.120 159.135 153.165<R>
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159.180 159.159
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Forest Conservation
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151.145 151.160 151.175<R>
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151.190 151.205 151.220<R>
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151.235 151.250 151.265<R>
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151.280 151.295 151.310<R>
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151.325 151.340 151.355<R>
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151.370 151.385 151.400<R>
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151.415 151.430 151.445<R>
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151.460 151.475 151.490<R>
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159.225 159.240 159.255<R>
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159.270 159.285 159.300<R>
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159.315 153.330 153.345<R>
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159.360 159.375 159.390<R>
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159.405 159.420 159.435<R>
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159.465 170.425 170.475<R>
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170.575 171.425 171.475<R>
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171.575 172.225 172.275<R>
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172.375
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The above is reprinted from Full Disclosure Newspaper. Subscribe today and
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get interesting articles like the above, plus more... pictures, graphics,
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advertisement, and more articles. Full Disclosure is your source for
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information on the leading edge of surveillance technology. Print the
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following form, or supply the information on a plain piece of paper:
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----
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Please start my subscription to Full Disclosure for:
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[ ] Sample issue, $2.00
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[ ] 12 issue subscription, $18.00
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[ ] 24 issue subscription, $29.95
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With 24 issue susbcription include free one of the following:
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[ ] Directory of Electronic Surveillance Equipment Suppliers
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[ ] Citizen's Guide on How to Use the Freedom of Info/Privacy Acts
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[ ] Maximizing PC Performance
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Also available separately:
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[ ] Directory of Electronic Surveillance Equipment Suppliers, $6.00
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[ ] Citizen's Guide on How to Use the Freedom of Info/Privacy Acts, $5.00
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[ ] Maximizing PC Performance, $6.00
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Illinois residences, add 6.5% sales tax on above 3 items.
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Return to: Full Disclosure, Box 903, Libertyville, Illinois 60048
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