#Cop radio police scanner install
#Cop radio police scanner drivers
#Cop radio police scanner software

I typically will use SDR Sharp to tune into the listed control channel frequency, to be sure the frequency is accurately listed. You can tune to frequencies in the FM radio band 88MHZ to 108MHz and find your favorite radio stations for your area! SDR Sharp is also a “fun to play with” piece of software. The Radio Reference group attempts to keep their databases up to date, however sometimes the listed control channels may be outdated or recently changed (slightly shifted). Also, we will be using SDR Sharp to verify that the listed control channel frequency specified is accurate.

#Cop radio police scanner drivers

Note: You will not need SDR Sharp to build our UniTrunker tracking radio scanner, however, it will come in handy to ensure the required RTL-SDR drivers and WinUSB drivers have been installed properly. I will walk you through it. It is not that bad, really! We need to download the following software: Note: We will be using an extremely popular online site () to find the control channels for our location. That being the case, I will attempt to present this information in a structured, step-by-step manner and hopefully prevent you from making the same mistakes.

#Cop radio police scanner install

Note: When I first attempted to install these programs, I ran into a few problems, mostly due to the order that I installed things. To build our SDR-based Trunked Radio scanner, we will need to install UniTrunker, as well as a few other required dependencies. UniTrunker is a Trunk Radio decoder that supports Motorola Type II, EDACS, MPT1327, P25 systems and works well with RTL-based SDRs.

#Cop radio police scanner software

UniTrunker: Trunk Radio decoding software My location here in Iowa borders Illinois, so talkgroups for law enforcement, fire, and safety share a common control channel.

Even cities, states, and provinces can be linked together. School campuses consisting of multiple buildings in various parts of the city can all be linked. In the ‘trunked’ system, the officers would be assigned to a talkgroup and not a dedicated channel and share a smaller pool of channels. It is common for greater than 350 talkgroups to share as few as 20 channels.Īnother benefit of a trunking system is multiple sites at separate locations can be linked together. An example could be made that a police agency needing a dozen conventional channels, would waste that portion of the spectrum if the channel were idle for any significant amount of time. Prior to its implementation, radio frequencies that were assigned were static. Trunking systems provide very efficient use of the radio spectrum. It becomes apparent that if we were to monitor a single frequency, we would miss most of the radio traffic for a given talkgroup’s system. When the transmission is responded to, this process is repeated and typically a different frequency is assigned for the reply. The control computer then assigns a frequency, and all radios logged into that talkgroup, switch to that assigned frequency, so they can hear the transmission. When the user pushes the PTT (push-to-talk) key, a request is sent to the control computer.

Virtual channels are created by an admin and assigned talkgroup numbers (listed in the Target column of UniTrunker). All radios in the talkgroup monitor the control channel to know which frequency to listen to.