User Defined Fleet Maps

Type I Programming Information

When a Type I system is designed, the address information for all the IDs are divided into 8 equal sized blocks. When you program your scanner to track a Type I system, you must select a size code for each of these blocks. When you have assigned a size code to all 8 blocks, you have defined the Fleet Map for the system you're tracking. Each size code determines the number of Fleets, Subfleets, and IDs each block will have. For example, a size code of "4" has one Fleet, which is divided into 16 separate Subfleets, and it has a total of 512 individual IDs.

When a block is assigned a size code, the Fleet or Fleets created within the block are assigned a Type I ID. The way these IDs display on your scanner depends on the block number and the blocks size code. When a Type I ID displays, the left most digit represents the block which contains the ID. The next two or three digits identify which Fleet is active, and the last digit(s) identifies the Subfleet.

Block

Subfleet

(1 digit)

(1 or 2 digits)

Which Fleet within the Block (2 or 3 digits)

Your task is to program your fleet map with the same size code assignments as the trunked system. If you do this accurately, you'll track all the Fleet-Subfleet combinations used by the system. In other words, you'll hear complete communications while monitoring a trunked system.

If you don't already know the size codes used, you'll have to guess at them. But since you don't have to figure out all the blocks at once, this isn't as hard as it seems. Select a size code for a block, and then press SRCH. Now listen to the communications. If you decide you are receiving most of the replies to the conversations with IDs assigned to the block you just programmed, then you've probably selected the right size code and can work on the next block of the map.

Finally, for most public safety systems there are some size codes which are more common. SIZE CODE 3 and SIZE CODE 4 are probably the most common, followed by SIZE CODE 10, SIZE CODE 11, and SIZE CODE 12.

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Uniden BCT-8 manual User Defined Fleet Maps, Type I Programming Information
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BCT-8 specifications

The Uniden BCT-8 is a portable scanner that has made a significant impact in the world of communications monitoring. Designed for both amateur enthusiasts and professional users, this device provides a robust set of features, making it an essential tool for anyone interested in receiving and decoding a wide range of radio frequencies.

One of the standout features of the BCT-8 is its ability to scan both conventional and trunked radio systems. This versatility allows users to listen to everything from local police and fire department communications to amateur radio operations and even aviation channels. The scanner operates between 25 MHz and 1300 MHz, covering a wide array of frequencies that cater to diverse listening interests.

The BCT-8 is equipped with a user-friendly interface, featuring an LCD screen that displays clearly readable information such as channel frequencies and descriptions. Additionally, it utilizes a programmable scan feature, enabling users to store frequencies in memory for quick access. This functionality is particularly useful for those who regularly monitor specific channels, saving time and simplifying the scanning process.

Another notable technology in the BCT-8 is its capability to decode CTCSS and DCS tones, allowing users to filter out unwanted signals and focus on the conversations that matter most to them. This feature is particularly beneficial for monitoring crowded frequencies, ensuring that listeners can hone in on their desired transmissions without interference.

The battery life of the Uniden BCT-8 is also impressive, providing extended use for those on the go. It can operate on AA batteries or a rechargeable battery pack, giving users flexibility depending on their listening habits and requirements.

In terms of build quality, the BCT-8 is sturdy yet compact, making it portable enough to carry during outdoor activities or while traveling. This is complemented by an included belt clip, allowing for hands-free operations, perfect for fieldwork or public safety applications.

Overall, the Uniden BCT-8 stands out for its extensive feature set and reliable performance, making it an ideal choice for individuals who wish to explore the rich world of radio communications. Its combination of advanced scanning capabilities, ease of use, and portability makes it a valuable addition to any scanner enthusiast's toolkit. Whether for personal use or professional monitoring, the BCT-8 excels in delivering comprehensive reception of diverse radio signals.
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