Beyond the Basics

check and the interruptions in the conversations by pressing HOLD/RESUME to hold on the desired frequency.

Notes The highway warning alert is inoperative while the scanner is on hold.

Be sure to press HOLD/RESUME to return to normal priority scan operation.

You cannot change priority channels, but you can lock out them out using L/O. You can select priority scanning mode by pressing PRI. PRI appears.

In normal Priority Scan mode, the scanner checks the priority frequency every two seconds. Priority only mode is recommended if you scan Arizona, Delaware, Florida, Michigan, Oklahoma, and Wisconsin. Hold down PRI to select priority only mode. PRI flashes.

In Priority off mode, the scanner does not check the priority frequency. PRI will not appear.

trunked highway frequencies

Trunked highway frequencies are preprogrammed for each state. When the scanner finds the control channel data, the scanner begins to find any active IDs. If the scanner finds an ID, it appears on the display and you hear it. If you press e while monitoring an ID, the scanner will check to see if any other IDs are active. If none are active, scanning resumes. When the scanner finds a control channel, it will stay on that control channel until reception of the control channel is lost. To force the scanner off the trunking control channel, press DATA. If you press d while a talk group ID is active, the frequency where the talk group is active flashes on the display. If you hold down d for two seconds, the ID and the frequency alternately appears on the display. To return to the normal display, press d again.

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Radio Shack PRO-2051 manual Trunked highway frequencies
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PRO-2051 specifications

The Radio Shack PRO-2051 is a standout model in the realm of scanner radios, known for its advanced features and user-friendly design. This unit is particularly favored among hobbyists and professionals alike for its superior performance in receiving a wide variety of radio frequencies.

One of the main features of the PRO-2051 is its wide frequency range, which spans from 29 MHz to 1.3 GHz. This includes the VHF and UHF bands, allowing users to listen to everything from public safety communications to amateur radio. The scanner also supports trunked radio systems, specifically the Type I, Type II, and Motorola systems. This makes it an invaluable tool for monitoring emergency services and other business communications that rely on trunking technology.

The PRO-2051 is equipped with an extensive memory bank, allowing users to store a significant number of channels. With 200 channels available and multiple banks, users can easily segment frequencies for various agencies, events, or interests. The scanner's capability to store frequencies in a user-friendly environment makes it easy for enthusiasts to quickly access the channels they most frequently monitor.

Another noteworthy characteristic is the scanner’s ability to utilize CTCSS and DCS tones. This feature helps eliminate unwanted noise by only allowing signals that match preset codes to be heard. This not only enhances clarity but also allows users to filter out unrelated conversations.

The PRO-2051 includes a backlit display, ensuring that users can read frequency and channel information even in low-light conditions. The front panel’s intuitive layout, featuring a simple keypad for inputting frequencies, adds to the overall ease of use.

Another significant aspect of the PRO-2051 is its ability to serve as a conventional scanner with features like Search Mode and Priority Scan, allowing users to quickly locate active frequencies. Furthermore, the scanner supports "Close Call" technology, which enables it to automatically detect and tune into nearby transmissions, ensuring users don’t miss important communications.

In terms of power, the PRO-2051 is designed for both AC and DC operation, providing versatility for both home use and field operations. This flexibility, combined with its advanced features and robust design, makes the Radio Shack PRO-2051 a top choice for anyone looking to explore the vast world of radio communications.
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