20-432.fm Page 31 Friday, July 14, 2000 11:30 AM

The fleets might be the police depart- ment, the fire department, the utilities, and city administration. The police might decide to further divide its fleet into subfleets such as dispatch, tacti- cal operations, detectives, north, south, east, and west side patrols, and supervisors. All the available police ra- dios would then be assigned to one of the police subfleets, letting the police centralize their communications and control the type of users on a single system. Determining the exact fleet- subfleet hierarchy for a particular area is referred to as fleet map program- ming.

The disadvantage of a Type I system is that the brief burst of data sent when a user transmits must contain the radio’s talk group ID, and its fleet and subfleet. This is three times the amount of data a Type II system radio sends. Since the data capacity of Type I systems is limited and the amount of data increases with each user, Type I systems usually accom- modate fewer users than Type II sys- tems. Nevertheless, Type I systems are still in use.

There are also hybrid systems which are a combination of both Type I and Type II. Your scanner defaults to mon- itor Type II systems, but you can change to Type I or a hybrid of Type I and Type II systems by selecting a pre programmed fleet map or creating a custom fleet map for your area (see “Scanning Type I and Hybrid Trunked Systems” on Page 40).

You do not need to determine the fleet-subfleet hierarchy for Type II sys- tems unless you are tracking hybrid systems that contain both Type I and Type II systems.

SETTING THE SCANNER TO THE TRUNK SCANNING MODE

Press TRUNK to switch between the scanner’s conventional and trunk scanning modes.

SETTING SQUELCH FOR THE TRUNK SCANNING MODE

The squelch setting can affect how fast your scanner acquires the data channel, and in some instances, can prevent your scanner from acquiring the data channel at all.

Adjusting SQUELCH is necessary to track transmissions precisely.

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Radio Shack PRO-2052 Setting the Scanner to the Trunk Scanning Mode, Setting Squelch for the Trunk Scanning Mode

PRO-2052 specifications

The Radio Shack PRO-2052 is a versatile and feature-rich scanner that has captured the attention of amateur radio enthusiasts and professionals alike. This desktop scanner is designed to receive a wide array of frequencies across various bands, making it a valuable tool for monitoring communications.

One of the standout features of the PRO-2052 is its ability to monitor VHF, UHF, and some trunked radio systems. It boasts a wide frequency coverage range from 25 MHz to 1.3 GHz, covering conventional FM, AM, and even the digital communications that have become increasingly popular. This extensive coverage ensures that users can receive a plethora of broadcasts, from local police and fire departments to amateur radio operators and public service communications.

Another significant feature is the scanner's memory capacity, which allows users to store up to 300 channels. This capability is particularly beneficial for those who frequently listen to multiple frequencies, as it provides the flexibility to switch between channels seamlessly. The scanner also supports the ability to organize channels into banks, making it even easier to manage multiple frequencies.

The PRO-2052 comes equipped with a variety of scanning modes, including Narrowband and Wideband scanning, which cater to different listening preferences and needs. Users can employ the Delay function that pauses scanning for a brief period after a transmission is detected, ensuring that they don’t miss any important information. Furthermore, the Priority Scan feature enables monitoring of a selected channel while still continuously scanning other frequencies, adding another layer of functionality.

In terms of usability, the PRO-2052 is designed with a clear and intuitive interface, featuring a backlit LCD that makes it easy to read in various lighting conditions. Its control panel is user-friendly with dedicated keys for commonly used functions, allowing both beginners and seasoned professionals to operate the device with ease.

Furthermore, the scanner has built-in weather alert capabilities, offering users prompt notifications about severe weather conditions, ensuring safety and preparedness. The PRO-2052 is powered either by an AC adapter or batteries, providing the flexibility to operate in various environments.

In summary, the Radio Shack PRO-2052 is a powerful and user-friendly scanner that offers a rich set of features, making it a top choice for those interested in radio communications. Its extensive frequency range, substantial memory capacity, and multiple scanning modes make it suitable for a wide variety of applications, proving to be a reliable companion for enthusiasts and professional users alike.