The systems in use are:

Motorola Type I — the radios send the radio ID, the fleet and subfleet talk group ID to the control channel each time they transmit. To program a Type I system, you need to know the system’s fleet map. The most common fleet maps are included in the Reference section in this manual. You can also find fleet map resources on the web at http://www.radioreference.com for example.

Motorola Type II — the radios only send the radio ID and radio channel code to the control channel. The central computer keeps a database of radio ID’s and which talk group is assigned to which channel code for each radio, so with this system the user’s radio sends only about 1/3 the data as a Type I system with each transmission. Type II systems do not use Fleet-subfleet talk groups; instead they use a 5-digit ID for each talk group.

Type IIi Hybrid — these systems support a mix of both Type I and Type II users. Like Type I systems, you must know the system’s fleet map to ensure proper tracking.

Motorola ASTRO 25 (APCO 25) — these radios are similar to Type II systems, but send only the radio ID and radio channel code to the control channel, transmitting voice in digital form. The BCT15 is not designed to process APCO 25 signals.

EDACS Trunking

EDACS trunking works in much the same way as Motorola trunking with a couple of major differences. In an EDACS system, each frequency used by the system is assigned a Logical Channel Number (LCN) so that less data needs to be transmitted by the control channel. Talk groups are assigned in an Agency-Fleet-Subfleet (AFS) hierarchy. There is one variation of EDACS called SCAT (Single Channel Autonomous Trunking) that your BCT15 can monitor.

Logical Channel Numbers — each frequency used by the system is assigned an LCN. This information is programmed into each user radio. When a user presses PTT, their radio sends their AFS information to the control channel. The computer then assigns that talk group to a channel and sends the LCN so that all other radios in that talk group will switch to the correct channel. To program an EDACS system in your scanner, you will need to know both the frequencies used by the system and the LCN for each frequency.

Agency-Fleet-Subfleet— talk group ID’s for EDACS systems are assigned in a way that makes it easy to see at a glance the affiliation of the user. Each radio is assigned a 2-digit agency identifier from 00 - 15. For example, 01 might be used

28

Page 27 Page 29
Page 28
Image 28
Uniden BCT15 manual Edacs Trunking
Page 27 Page 29

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.
Top Page Image Contents