Glossary of Terms

Alpha tag - This term refers to an alphanumeric text tag that you can enter to describe the individual frequencies that you have programmed. Rather than having to associate a specific frequency to the individuals that are using it, you can enter the actual name of the group. This will eliminate the need for memorizing the group’s frequency.

Attenuator - This scanner comes with a feature to attenuate or reduce the signal strength. The built-in attenuator can be turned on specific frequencies to prevent strong signals from overloading the scanner input, possibly damaging the scanner or missing other transmissions due to the repeated stopping on the stronger signal.

Clone - This term identifies the ability to set up a duplicate scanner. This function allows you to clone all the programming information, including frequencies, talkgroups and alpha tags as well as bank settings and other parameters from one BC250D to another or BC785D.

Control Channel - This is the frequency within a trunking system that runs the system. On Control Channels (sometimes called Data Channels) you will hear a buzz saw sound. For the most part, it is the sound of the system’s central computer directing talkgroups to particular voice (working) frequencies within the system.

CTCSS - (Continuous Tone Controlled Squelch System) refers to a system where the radio receivers are equipped with tone responsive devices which allow audio signals to appear at the audio output, select voice processing such as scrambling or control repeater functions only when a carrier modulated with a specific tone is received. This method may be used to restrict access to the repeater or receiver, or reduce interference where several stations with output frequencies in close proximity of each other make it difficult to hear the conversation you are interested in. With CTCSS squelching, you can eliminate the possibility of hearing unwanted conversations by selecting one of the 38 standard subaudible tones. You will only hear those transmissions that have been programmed on specific frequencies with the specific subaudible tone that you have selected.

DCS - (Digital Controlled Squelch) refers to a system where the radio receivers are equipped with data burst responsive devices which allow audio signals to appear at the audio output, select voice processing such as scrambling or control repeater functions only when a carrier modulated

BC250D specifications

The Uniden BC250D is a versatile and powerful handheld scanner that caters enthusiastically to the needs of both amateur radio enthusiasts and professionals alike. With its compact design and extensive feature set, the BC250D stands out in the crowded field of communication devices.

One of its significant features is the 200 channels it can store, making it suitable for various scanning tasks. Users can easily program frequencies across public service and amateur bands, including police, fire, and emergency medical services. The BC250D also supports a full range of frequencies from 24 MHz to 1300 MHz, accommodating diverse communication needs.

The scanner’s advanced trunking capabilities allow users to access trunked radio systems, which are frequently used by public safety agencies and commercial entities. It supports both Motorola and EDACS trunking protocols, making it adaptable to numerous scanning scenarios.

Another key characteristic of the BC250D is its customizable scanning options. Users can set priorities for specific channels, enabling them to focus on the most relevant communications. The scanner also features a "Close Call" technology that detects nearby signals automatically, providing real-time monitoring without pre-programmed frequency setups. This feature is particularly beneficial for catching local transmissions that might not be otherwise listed.

The interface of the BC250D is user-friendly, designed to allow easier navigation through its extensive features. The display is crisp and vibrant, presenting information clearly even in low-light conditions. Additionally, the scanner supports alpha tagging, allowing users to assign names to channels for easier identification.

Powering the Uniden BC250D is an internal rechargeable lithium-ion battery, which ensures longer use without the need for frequent battery changes. Plus, with an included belt clip, it’s easy to carry around, making it perfect for users who are always on the go.

In terms of connectivity, the BC250D's built-in computer interface allows for firmware updates and programming through a PC, enhancing its functionality over time.

Overall, the Uniden BC250D combines advanced scanning technology with user-friendly features, solidifying its position as a reliable scanner for a wide range of applications. Whether for hobbyists or professional users, this scanner delivers performance, flexibility, and ease of use.