Radio Shack ET-153 owner manual Read This Before Installation, FCC Statement

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43-891B.fm Page 5 Thursday, February 18, 1999 3:46 PM

Read This Before Installation

We have designed your ET-153 to conform to federal regulations and you can connect it to most telephone lines. However, each de- vice you connect to the phone line draws power from it. We refer to this power draw as the device’s ringer equivalence number, or REN. The REN is on the bottom of the ET-153.

If you use more than one phone or other device on the line, add up all the RENs. If the total is more than five (or three in rural areas), your phone(s) might not ring. If ringer operation is impaired, remove a device from the line.

FCC Statement

Your ET-153 complies with Part 68 of FCC Rules. You must, upon request, provide the FCC registration number and the REN to your phone company. These numbers are marked on the bottom of the ET-153.

Note: You must not connect the headset telephone to:

coin-operated systems

party-line systems

• most electronic key phone systems

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Contents ET-153 43-891B.fm Page 2 Thursday, February 18, 1999 346 PM Features 43-891B.fm Page 4 Thursday, February 18, 1999 346 PM FCC Statement Read This Before InstallationContents Preparation Connecting to the Phone LineAdjusting the Headset 43-891B.fm Page 9 Thursday, February 18, 1999 346 PM Setting the Dialing Mode Turning the Ringer Off/On Using the Belt Clip Answering a Call Initiating the SwitchhookPlacing a Call Setting the Volume Using Hold Using Flash Using Redial Using Tone Services with a Pulse Line Troubleshooting Care and Maintenance FCC Wants You To Know Lightning 43-891B.fm Page 24 Thursday, February 18, 1999 346 PM 43-891B.fm Page 25 Thursday, February 18, 1999 346 PM 43-891B.fm Page 26 Thursday, February 18, 1999 346 PM Limited One-Year Warranty We Service What We Sell

ET-153 specifications

The Radio Shack ET-153 is a compact and versatile electronic device that embodies the spirit of innovation that Radio Shack has been known for over the decades. Primarily designed as a portable electronic learning tool, this device presents an engaging way for users to delve into the world of electronics and circuitry.

One of the standout features of the ET-153 is its user-friendly interface. It boasts a clear LCD display that makes reading and navigating through different functions a breeze. The device is equipped with numerous built-in learning modules that cover a variety of fundamental electronic principles, making it an excellent educational tool for aspiring engineers and hobbyists alike.

The ET-153 is powered by a combination of advanced technologies. It integrates both analog and digital circuit design capabilities, allowing users to explore the relationships between both domains. This blend of technologies is perfect for hands-on experimentation and learning, as it provides a well-rounded foundation in electronics.

Additionally, the ET-153 includes a built-in microprocessor that enhances its functionality. This microprocessor allows for real-time simulations, enabling users to test their circuits virtually before physical implementation. This feature minimizes the risk of damaging components and saves time, fostering more efficient learning experiences.

The device has numerous input/output ports that offer flexibility for various connections and integrations. Users can connect different components such as resistors, capacitors, and transistors, enhancing their understanding of circuit design. The ET-153 also supports external power supply options, ensuring longer usage sessions without frequent battery replacements.

Moreover, the compact and portable design of the ET-153 makes it convenient for users who wish to learn on the go. It is lightweight and easily fits into a backpack, making it perfect for students or professionals who are traveling. The battery life is commendable, which allows for extended usage in various settings, whether at home or in a classroom environment.

In conclusion, the Radio Shack ET-153 stands out as a remarkable product that combines educational value with practical application. Its array of features, including a user-friendly interface, advanced technologies, and versatile connectivity, makes it an ideal choice for anyone interested in mastering the fundamentals of electronics. For learners and enthusiasts alike, the ET-153 serves as a bridge between theoretical knowledge and practical skills in the expansive realm of electronics.