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- HAMNET SCANNER SEARCHERS GUIDE
- Compiled by Steve Sampson
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-
- 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
-
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