43-1043.fm Page 16 Tuesday, August 17, 1999 10:36 AM

Problem: The handset’s range decreases.

Solutions:

•Fully extend the base’s antenna vertically.

•Return the handset to the cradle, and recharge the battery.

•Be sure the antenna is not touching a metal surface.

Problem: Receiver sound flutters or fades.

Solutions:

•Be sure the battery is charged.

•Fully extend the base’s antenna vertically.

•Move the handset closer to the base.

Problem: Can make calls, but telephone does not ring.

Solution: Telephone company may be using unusual ringing methods. Your tele- phone is designed for standard straight line bridged ringing.

Problem: Can receive calls, but cannot make calls.

Solutions:

•Set TONE/PULSE correctly for the type of service you have (see “Setting the Dialing Mode”).

•Check with the phone company to see if service is out in your area.

Problem: You cannot answer/make a call and the handset sounds an error tone when you lift it from the base or press TALK.

Solution: The phone might be receiving interference from another RF signal; or, if the handset is away from the base during a long period of AC power failure, the phone might loss its access protection code. Return the handset to the base for 5 seconds.

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Radio Shack ET-543 owner manual Problem The handset’s range decreases
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ET-543 specifications

The Radio Shack ET-543 is a noteworthy addition to the realm of portable electronic technology, particularly in the category of handheld calculators and educational tools. Launched during a vibrant era of innovation, the ET-543 encapsulates the spirit of the late 20th century, when personal computing and digital gadgets became increasingly accessible to the general public.

At its core, the ET-543 features a natural display that allows for easy viewing of calculations, making it user-friendly for both novices and seasoned users alike. The device is equipped with a combination of mathematical functions that streamline computations ranging from basic arithmetic to more complex algebraic operations. This wide array of capabilities makes the ET-543 an ideal choice for students and professionals who require a reliable tool for everyday calculations.

One of the standout technologies of the ET-543 is its robust memory function, which allows users to store multiple calculations for later use. This feature is particularly beneficial for users who engage in repetitive tasks or require a quick reference for previously calculated values. Coupled with its programmable functions, the ET-543 presents a versatile platform that can accommodate a range of mathematical needs.

In terms of design, the Radio Shack ET-543 boasts a compact and lightweight form factor, making it highly portable. This characteristic is essential for users who need a dependable calculator on the go, whether in the classroom, workplace, or during travel. The button layout is intuitive, allowing for easy navigation through various functions without the need for extensive training.

Another important aspect of the ET-543 is its educational value. The device serves as a practical teaching aid, helping students grasp fundamental concepts of mathematics and computation. Its durability and ease of use ensure that it stands up to repeated use in educational environments.

In summary, the Radio Shack ET-543 is more than just a calculator; it embodies the fusion of technological innovation and user-centric design. With features tailored to meet a variety of mathematical challenges, coupled with its portability and educational utility, the ET-543 remains a symbol of practical technology that resonates with users across generations.
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