Date: 6 Jul 89 06:10:46 GMT Subject: Scanner Search Aid Version 4 =============================================================================== HAMNET SCANNER SEARCHERS GUIDE Compiled by Steve Sampson =============================================================================== 30.000 - 46.610 MHz Business Band, Government Emergency Guard 40.500 Primary 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 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 Second. 76.000 - 88.000 MHz VHF Television (Ch 5 - 6) 88.000 - 108.000 MHz FM Commercial Advertising (some music) 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 Emergency Guard 121.500 Primary 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 151.000 - 156.250 MHz Business Band (Police, Fire) 156.250 - 157.425 MHz Marine Band Emergency Guard 156.800 Primary 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 TV 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 (Military Aviation) 329.000 - 335.000 MHz Government (Airport Glide Slope Navigation) 335.000 - 400.000 MHz Government (Military Aviation) 364.200 AICC (Airborne Intercept Control Common) Many security low power control devices are located in the 225 - 400 band, both civilian and government. Emergency Guard 243.000 Primary 282.800 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 Amateur Radio 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 -1215.000 MHz Military TACAN, JTIDS, and Civilian DME 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 width is 3.5 microseconds. Aircraft sounds like a Top Fuel Dragster or Funny Car when searching for lock-on. Channel VOR Air Ground ------------------------------- 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 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 Aircraft 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 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. 1215.000 - 1240.000 MHz Government 1227.6 MHz Is the Civilian Global Positioning Satellite (GPS) Frequency L2 and 1575.42 MHz is L1. Will probably replace LORAN and VOR when fully functional. 1240.000 - 1300.000 MHz Amateur Radio, Government