Ham Amateur Radio Technician Practice Exam

What is the function of an electronic keyer?

1. Automatic generation of dots and dashes for CW operation

2. Adjustment of signal modulation levels

3. Improvement of audio quality in transmissions

4. Filtering background noise in signals

The correct answer is: Automatic generation of dots and dashes for CW operation

The function of an electronic keyer is to automatically generate dots and dashes for CW (Continuous Wave) operation, which is a form of Morse code used in amateur radio communication. This device simplifies the process of sending Morse code signals by converting the operator's keying (the pressing and releasing of the key) into a series of on-off signals that correspond to the Morse code characters. Electronic keyers often allow users to set their desired speed for sending CW, making it easier for operators to communicate at their preferred pace without needing to manually time each element of the code. This automation is especially beneficial for beginners and those who may not yet be proficient at sending Morse code by hand, allowing for more efficient and effective communication in this mode. While modulation levels, audio quality, and noise filtering are important aspects in radio communication, they are not functions associated with an electronic keyer, which is specifically designed for generating the timing of Morse code elements.