66-88 MHz 118-174 MHz 406-512 MHz 806-956 MHz
1.5-2 MHz FM Illegal cordless phones 46.5-47 MHz FM Illegal cordless phones 78-80 MHz FM Police, Firedepartement, Customs, Ambulance... 90-110 MHz WFM Radio channels (P1, P2, P3...) 118-137 MHz AM Aeroplanes 155-162 MHz FM Marine 400-468 MHz FM Various communication 410-412 MHz FM Police (larger cities) 420-468 MHz FM Cellular phones 890-960 MHz FM Cellular and cordless phones
NMT (Nordic Mobilephone Net) is analogue and can be picked up with a scanner without any extra equipment.
You also need software for the computer to receive the signals. What software depends on what format the digital signals have. Some common formats are:
CW Telegraph (morse code) RTTY Format for sending text (RadioTeleTYpe). AMTOR RTTY with error correction (also called navtex,arq,fec...) FACSIMILE Format for sending fax images SSTV Radio Television POCSAG Post Office Code Standardization Advisory (Minicall messages)
HAMCOM is a great program that deals with most of the formats above. To receive POCSAG messages you need another program, PD (Pocsag Decoder). Both programs can be downloaded from Pervisell.
In Sweden minicall messages are sent on 161.4375 and 169.8 MHz (pocsag). There are 2 types of minicall messages, numeric and alpha. Numeric is numbers only and alpha is text messages. Numeric minicalls are used like person seekers, mostly telephone numbers. Alpha minicalls are used by the police, taxi, companies... Alpha minicall messages are also supported by Lotus Notes (used by many companies).
Last updated 1997-07-18 by LordB