![]() ![]() What are PL and DPL (private line & digital private line) or CTCSS and DCS sub-audible tone codes?Īntennas- There is no better way to improve reception, whether for base or mobile scanning, then by adding an outside antenna. ![]() Many agencies also used MDT's (mobile data terminals), the computers in the patrol cars as well as cellular and NEXTEL phones for private communications. There are also a few non-standard digital radio systems that are not monitorable at this time such as EDACS ProVoice, M/A-COM OpenSky and European Tetra. A few agencies operate in encryption full time. You must buy a digital scanner (such as the Bearcat 296 or 796) or a digital-ready scanner (theīearcat 250 or 785 which accept a digital card) in order to monitor digital communications.ĭigital scanners decode APCO-25 non-encrypted transmissions automatically (encrypted communications cannot be decrypted). There is no way to upgrade an older or non-digital scanner. Older public safety radio systems are often being replaced with the new digital systems. Just like your cell phone, a digital two-way radio system converts voice into ones and zeros and transmits this data to another radio which decodes the information so the voice communication (sometime sounding a bit robotic) is heard on the other end.
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