scanner. Now, the Fort Worth systems are locked out and System Quick Keys [1], [2], and [3] allow selection between the Phoenix-area systems.

Multi-Site Trunking

Some systems covering a very large geographic area use multiple antenna sites that each operate on different frequencies, but that use the same Talk Group ID’s for traffic. When programming such a system, you program each site’s frequencies and other settings into the system, then program the channels into channel groups within that system. Each site can have its own quick key, so you can turn each individual site on or off while you scan. Since all sites share all the channels within the system, multi-site trunking is much more efficient than programming each site as a separate system.

Not only does your BCT15 scan channels like a conventional scanner, it actually follows the users of a trunked radio system. Once you know and program a talk group’s ID (TGID), you won’t miss any of the action.

If you are a new scanner enthusiast, you might want to read the first part of this manual and use your scanner in conventional mode before you begin trunk tracking. Understanding scanning fundamentals and terminology will make trunk tracking much easier. If you are already an experienced scanner operator, you can review the programming worksheets and their associated pages in the Reference Section of this manual.

Types of Trunking Systems

Trunking systems divide a few frequencies among many different users, but the way that each system does this is slightly different. This section describes some of the technical data behind Motorola, EDACS, and LTR trunked radio systems.

Motorola Trunking

All Motorola trunking systems use the same basic trunking method. The system consists of one control channel (or as many as 4 per system but only one is active at any one time), plus one or more voice channels (typically 10, 20, or 28 total channels). When a user presses Push To Talk (PTT) to transmit, their radio first sends the person’s talk group information to the control channel. The computer then assigns that talk group to a specific voice channel and transmits that data over the control channel. All radios in that talk group switch over to the assigned voice channel and the user can begin speaking. This all typically takes place in about a second...the person transmitting hears a beep from their radio when the channel is assigned and then it is OK to start talking.

Understanding Scanning and the BCT15

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Uniden BCT15 manual Multi-Site Trunking, Types of Trunking Systems, Motorola Trunking
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BCT15 specifications

The Uniden BCT15 is a highly regarded mobile scanner designed specifically for enthusiasts of radio communications. This versatile scanner is equipped with advanced technologies and features, making it a popular choice among both amateur and professional users looking to keep up with various frequencies and radio transmissions.

One of the most notable features of the BCT15 is its ability to scan analog and digital frequencies, which allows users to access a wide range of communications, including police, fire stations, amateur radio operators, and even aircraft communications. The scanner supports both conventional and trunked systems, providing flexibility in monitoring different types of radio signals.

The BCT15 has a frequency range that spans from 25 MHz to 1300 MHz, which ensures users can capture a diverse selection of channels. It features an advanced microprocessor that provides fast scanning capabilities, with the ability to scan up to 30 channels per second. Additionally, the built-in 1000 channel memory allows users to store a substantial amount of frequencies, enabling seamless access to frequently used channels without the need for constant reprogramming.

One of the standout technologies included in the Uniden BCT15 is the Close Call RF Capture Technology. This feature allows the scanner to detect and instantly tune into nearby frequencies that are in use, providing a real-time listening experience. This is particularly useful in dynamic environments where new signals may frequently emerge.

The BCT15 also comes equipped with Easy-to-Program memories, making it user-friendly for those who may not be as tech-savvy. Users can also utilize the built-in search features to identify active frequencies within a specific range, which is invaluable when exploring new channels or areas. The backlit display and intuitive interface further enhance the user experience, allowing for easy navigation even in low-light conditions.

Furthermore, the scanner includes a programmable scan delay, a priority channel feature, and weather band capabilities. This allows users to stay informed about local weather conditions, an essential feature for anyone who enjoys outdoor activities.

Overall, the Uniden BCT15 is a powerful and user-friendly scanner that combines innovative technology with practical features. Whether for hobbyists or professionals, its extensive capabilities cater to a broad audience interested in the world of radio communications. With its solid performance, ease of use, and comprehensive features, the BCT15 remains a top choice for scanner enthusiasts.
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