Connecting AN External Speaker

You can connect an optional external speaker with a 1/8-inch (3.5-mm) plug to the scanner. Use an 8-ohm external speaker that can handle at least 2.5 watts of power. Your local RadioShack store sells scanner accessories, includ- ing external speakers.

Insert the speaker’s plug into the EXT. SP. jack on the back of the scanner.

Insert the earphone’s or headphones’ plug into the EXT. SP. jack on the back of the scanner.

Note: Plugging in an earphone or head- phones disconnects the scanner’s inter- nal speaker.

Note: Plugging in an external speaker disconnects the scanner’s internal speaker.

CONNECTING AN

EARPHONE OR

HEADPHONES

You can connect an optional earphone or pair of monaural headphones with a 1/8- inch (3.5-mm) plug to the scanner. Your local RadioShack store sells a complete line of earphones and headphones.

Listening Safely

To protect your hearing, follow these guidelines when you use an earphone/ headphones.

•Set the volume to the lowest setting before you begin listening. After you begin listening, adjust the volume to a comfortable level.

•Do not listen at extremely high vol- ume levels. Extended high-volume listening can lead to permanent hearing loss.

•Once you set the volume, do not increase it. Over time, your ears adapt to the volume level, so a vol- ume level that does not cause dis- comfort might still damage your hearing.

20-422 specifications

The Radio Shack 20-422 is a versatile and compact handheld scanner that has garnered recognition among hobbyists and communication enthusiasts alike. This model is designed to provide users with an easy-to-use interface and advanced scanning capabilities, making it a popular choice for those looking to stay connected with public safety, aviation, and other radio communications.

One of the standout features of the Radio Shack 20-422 is its ability to scan a wide range of frequencies. With coverage from 30 MHz to 900 MHz, it allows users to access a diverse array of radio signals, including AM, FM, and analog transmissions. This broad frequency range ensures that operators can track vital communications from police departments, fire services, and emergency medical teams.

In addition to its expansive scanning capabilities, the 20-422 is equipped with 200 programmable channels. This enables users to store their favorite frequencies for quick access, thus enhancing the overall user experience. The unit is also compatible with commonly used trunking systems, which allows users to monitor communications from trunked radio systems, widely employed by public safety organizations.

The Radio Shack 20-422 comes with a customizable priority scanning feature, which allows users to set specific channels to scan more frequently. This ensures that important communications are not missed, adding a level of efficiency to the scanning process. Moreover, the scanner features a large LCD display that provides users with clear visibility of the frequency and other important information.

From a technological standpoint, the 20-422 is equipped with automatic frequency identification, which simplifies the process of discovering new radio signals. The built-in alert system notifies users when specific transmissions are detected, adding convenience to the scanning routine.

The ergonomic design of the Radio Shack 20-422 enhances ease of use, equipped with a comfortable grip and well-placed buttons for intuitive operation. The scanner is powered by a reliable battery system, ensuring long hours of dynamic scanning capabilities, whether you are in a stationary location or on the move.

In summary, the Radio Shack 20-422 stands out as a powerful tool for anyone interested in radio communications. With its extensive frequency coverage, programmable channels, and user-friendly design, this handheld scanner is perfect for hobbyists, emergency responders, and anyone else looking to stay connected with their community.

Radio Shack 20-422 Connecting AN External Speaker, Connecting AN Earphone or Headphones

Models: 20-422