After you program your scanner, you can protect it from accidental program changes by turning on the keylock feature. When the keylock is on, the

only controls you can use are SCAN, MANUAL, KEYLOCK, VOLUME/OFF, and

SQUELCH.

To turn on the keylock, press KEYLOCK until K/L appears on the display. To turn it off, press KEYLOCK until K/L disappears.

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Radio Shack PRO-27 manual Squelch

PRO-27 specifications

The Radio Shack PRO-27 is a highly regarded handheld scanner that has made its mark in the world of two-way communication and public safety monitoring. Known for its versatility and user-friendly features, the PRO-27 caters to both amateur radio enthusiasts and professionals alike.

One of the standout features of the PRO-27 is its ability to cover a wide frequency range. It can receive VHF, UHF, and even some 800 MHz frequencies, allowing users to scan a diverse array of signals, including those from police, fire, and emergency medical services. This extensive range ensures that users are always tuned into the action, making it an invaluable tool for active listeners.

The PRO-27 is equipped with a 200-channel memory capacity, allowing for the storage of multiple frequencies. This makes it easy for users to quickly switch between channels of interest without the need for manual reprogramming. The banks can be organized in a way that suits the user's needs, whether that means grouping by agency, location, or type of service.

Additionally, the scanner features a programmable scan mode that enhances the scanning experience. Users can set their priorities, allowing certain channels to come to the forefront while others remain in the background. This is particularly useful during emergencies when certain frequencies may become more critical.

Another notable aspect of the PRO-27 is its simple user interface. The backlit LCD display provides clear visibility, even in low-light conditions, while the keypad is logically arranged to facilitate quick navigation and frequency input. Furthermore, the inclusion of a headphone jack allows for private listening, which is a preferred feature for those who want to remain discreet.

Technologically, the PRO-27 uses a high-performance scanner chip that enhances sensitivity and selectivity, ensuring that it picks up even weak signals with clarity. The device also features a durable casing, making it suitable for on-the-go use without worrying about everyday wear and tear.

Ultimately, the Radio Shack PRO-27 remains a popular choice among scanning enthusiasts for its comprehensive feature set, ease of use, and reliable performance. Whether you are looking to keep tabs on local law enforcement or just enjoy the excitement of radio listening, the PRO-27 offers a compelling option that accommodates a variety of scanning needs. Its combination of technology and user-friendly design represents a classic in the realm of handheld scanners.