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SCANNER SEARCHERS GUIDE
Version 5, Compiled by N5OWK
Public Domain (p) January 1990
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30.000 - 46.610 MHz Business Band, Government
350020 McDonalds Drive-Up Orders (Common)
40.500 Emergency "Guard" (NAVY)
46.610 - 47.000 MHz Portable Phones
The following channels are listed as BASE/HANDSET.
46.610/49.670 Channel 1
46.630/49.845 Channel 2
46.670/49.860 Channel 3
46.710/49.770 Channel 4
46.730/49.875 Channel 5
46.770/49.830 Channel 6 (Also Baby Monitors on 49.83)
46.830/49.890 Channel 7 (Also Baby Monitors on 49.89)
46.870/49.930 Channel 8
46.930/49.990 Channel 9
46.970/49.970 Channel 10
47.000 - 49.670 MHz Business Band
49.670 - 50.000 MHz Portable Phones
50.000 - 54.000 MHz Amateur Radio
54.000 - 72.000 MHz VHF Television (Ch 2 - 4)
Television Channels are 6 MHz wide
Video is Fo + 1.25 MHz
Audio is Video + 4.5 MHz
Color Burst is Video + 3.5795 MHz
72.000 - 76.000 MHz Model Radio Control, Aviation and Industry
75.000 MHz is Aircraft Navigation Marker Beacon. This is near
airports on the ILS (Instrument Landing System) course. Three lights
are in the cockpit (Purple, Amber, White):
Purple - Outer Marker, Intercept Point, 4 to 7 Miles downrange
Two 400 Hz Dashes Per Second.
Amber - Middle Marker, Cat I Decision Height, 3500 Feet
downrange, 1300 Hz Dot and Dashes 95 times a minute.
White - Inner Marker, Cat II Decision Height, 3000 Feet
downrange, Six 3000 Hz Dots Per Seco nd.
76.000 - 88.000 MHz VHF Television (Ch 5 - 6)
88.000 - 108.000 MHz FM Commercial Advertising
108.000 - 112.000 MHz Aviation Navigation (Terminal VOR, ILS)
Currently 80 50 kHz Channels
112.000 - 117.950 MHz Aviation Navigation (VOR)
Currently 120 50 kHz Channels
118.000 - 136.000 MHz Aviation Communication
Currently 720 25 kHz Channels
121.500 Emergency, Emergency Locator Transmitters (ELT), "Guard"
122.700, 122.725, 122.800, 122.925,
122.975, 123.000, 123.050, 123.075 - UNICOM frequencies
122.900 - MULTICOM frequency
123.050, 123.075 - Heliports
122.750 - Air to Air Communications
122.975 - Air to Air Communications for high altitudes (airliners)
123.450 - Air to Air Communications (Trans-ocean get together, etc)
121.600 - CAP practice ELT search (under authorized missions only)
121.700, 121.800, 121.900 - Ground control frequencies.
136.000 - 138.000 MHz Weather Satellite, Government, Business
138.000 - 144.000 MHz Government (Military Bases)
144.000 - 148.000 MHz Amateur Radio
148.000 - 151.000 MHz Government, CAP, CD, MARS
151.000 - 156.250 MHz Business Band (Police, Fire)
156.250 - 157.425 MHz Marine Band
156.800 Marine Emergency "Guard"
157.450 - 160.200 MHz Business Band (Police, Fire)
160.200 - 161.600 MHz Railroad (161.600 is Marine Band)
161.605 - 161.795 MHz Business Band (Radio and V Remotes)
161.800 - 162.000 MHz Marine Band (Telephone)
162.000 - 174.000 MHz Government, Some Business (Radio and TV Remotes)
This is the common "Government Band", frequency spacing
is typically 12.5 kHz, other users are 5 kHz spacing
NOAA Weather is transmitted on:
162.400, 162.425, 162.450, 162.475, 162.500, 162.525, 162.550
174.000 - 216.000 MHz VHF Television (Ch 7 - 13)
216.000 - 220.000 MHz Maritime Mobile
220.000 - 222.000 MHz Land Mobile Radio
222.000 - 225.000 MHz Amateur Radio
225.000 - 329.000 MHz Government
329.000 - 335.000 MHz Government (Airport Glide Slope Navigation)
335.000 - 400.000 MHz Government
364.200 AICC (Airborne Intercept Control Common)
Many security low power control devices are located in the 225 - 400
band, both civilian and government.
243.000 Emergency Primary "Guard"
282.800 Emergency Secondary "Twenty-Eight Twenty-Eight"
400.000 - 420.000 MHz Government (Base Walkie/Talkies, Pagers, etc)
420.000 - 450.000 MHz Amateur Radio
450.000 - 470.000 MHz Business Band (Police, Fire, Radio and TV Remotes)
470.000 - 890.000 MHz UHF Television (Ch 14 - 83)
(All channels not used anymore, 70 - 83 Obsolete)
806.000 - 810.000 MHz Business Band (Conventional Systems, Mobile Input)
810.000 - 816.000 MHz Public Safety (Slow Growth Systems, Mobile Input)
816.000 - 821.000 MHz Business Band (Trunked Systems, Mobile Input)
821.000 - 825.000 MHz Land Mobile Satellite Service (Mobile Input)
825.000 - 835.000 MHz Cellular Telephone Non-Wireline (Mobile Input)
835.000 - 845.000 MHz Cellular Telephone Wireline (Mobile Input)
845.000 - 850.000 MHz Cellular Telephone (Expansion, Mobile Input)
850.000 - 851.000 MHz Unallocated
851.000 - 855.000 MHz Business Band (Conventional systems, Base Output)
855.000 - 861.000 MHz Public Safety (Slow Growth Systems, Base Output)
861.000 - 866.000 MHz Business Band (Trunked Systems, Base Output)
866.000 - 870.000 MHz Land Mobile Satellite Service (Satellite Output)
870.000 - 880.000 MHz Cellular Telephone Non-Wireline (Base Output)
880.000 - 890.000 MHz Cellular Telephone Wireline (Base Output)
890.000 - 895.000 MHz Cellular Telephone (Expansion, Base Output)
895.000 - 902.000 MHz Land Mobile Radio (Mobile Input)
902.000 - 928.000 MHz Free-For-All, No use near White Sands, and Denver
928.000 - 930.000 MHz Multi-Address Paging
930.000 - 931.000 MHz Advanced Technology Paging
931.000 - 932.000 MHz Common Carrier Paging
932.000 - 935.000 MHz Government/Private Shared
935.000 - 941.000 MHz Land Mobile Radio (Base Output)
941.000 - 944.000 MHz Government/Private Shared
944.000 - 947.000 MHz Broadcast Studio To Transmitter Link
947.000 - 952.000 MHz Broadcast Radio Services
952.000 - 960.000 MHz Microwave Relay and Paging
960.000 -1240.000 MHz TACAN/DME, RADAR/IFF, Government
TACAN has 126 X and 126 Y channels. Normally only X channels
are used, unless crowded. TACAN frequencies are tied to VOR
frequencies. (Note: there are more TACAN frequencies than
VOR frequencies, some are blanked around the ATCRBS Beacon
frequencies, and others are for expansion and military use).
Pulse widths are 3.5 microseconds. Aircraft sounds like a Top
Fuel Dragster or Funny Car when searching for lock-on.
Channel VOR Air Ground
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17X 108.00 1041 978
17Y 108.05 1041 1104
18X 108.10 1042 979
18Y 108.15 1042 1105
19X 108.20 1043 980
19Y 108.25 1043 1106
. . .
58X 112.10 1082 1019
58Y 112.15 1082 1145
59X 112.20 1083 1020
59Y 112.25 1083 1146
. . . (Unused to protect Beacon)
70X 112.30 1094 1157
70Y 112.35 1094 1031 (Unused to protect Beacon)
126X 117.90 1150 1213
126Y 117.95 1150 1087 (Last VOR pairing)
29Y and 92Y Favorites for Military Air Refueling (Air-Air)
Check the heavens if active. All Air-Air pairs are 63 Y apart.
29Y N/A 1053 1116
92Y N/A 1116 1053
Air Traffic Control Radar Beacon System (ATCRBS - "At Crabs",
Secondary Radar - to the British)
1030 MHz Ground Interrogations to Transponder
1090 MHz Transponder Replies to Ground
There are currently five interrogation modes in use:
Mode 1, 2 pulses spaced 3 microseconds [Military]
Mode 2, 2 pulses spaced 5 microseconds [Military]
Mode 3/A, 2 pulses spaced 8 microseconds [Military/Civilian]
Mode 4, encrypted, IFF [Military]
Mode C, 2 pulses spaced 21 microseconds [Military/Civilian]
A third pulse is also included in all modes (except 4) at
2 microseconds from the first. This is the sidelobe pulse.
if it's within @6 dB of the first pulse (or greater) the
transponder doesn't reply (as it has detected an antenna
sidelobe). Pulse widths are .8 microseconds.
The reply is two framing pulses spaced 20.3 microseconds apart,
with 13 code pulses (0000 - 7777 Octal) and an X pulse at the
center which is not used anymore). A fourth pulse (called SPI
pulse (Special Position Identifier) is used to identify your
s position when asked by a controller to "Squawk Ident", it is
4.35 microseconds after the last framing pulse and lasts for
20 seconds (about 2 scans of a long range radar). Pulse widths
are .45 microseconds.
1575.42 MHz is the Navstar Global Positioning System (GPS)
frequency L1, and 1227.6 MHz is L2.
1240.000 - 1300.000 MHz Amateur Radio, Government
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