March 2018
Beginner
432 pages
11h 23m
English
Content preview from Ham Radio For Dummies, 3rd Edition
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Appendix A
Glossary
This glossary includes material contributed by the ARRL. A broader glossary is available at www.arrl.org/ham-radio-glossary.
- AC
- See alternating current (AC).
- AC buzz
- Unwanted 120 Hz noise added to an audio or RF signal due to inadequate filtering in a power supply or inadequate grounding and bonding. See also hum.
- AC voltage
- A voltage with a polarity that reverses at regular intervals.
- ADC
- Analog-to-digital converter, changes an analog waveform into digital data.
- active filter
- See filter.
- adapters
- Connectors that convert one type of connector to another.
- airband
- The frequencies from 108 MHz to 137 MHz, used for civil aviation communications and navigation.
- allocations
- Frequencies authorized for a particular FCC radio communications service.
- alternating current (AC)
- Electrical current with a direction that reverses at regular intervals.
- AM band
- The commercial AM broadcast band, spanning 530 kHz to 1710 kHz.
- Amateur Radio Emergency Service (ARES)
- A group, sponsored by the ARRL, that provides emergency communications. ARES works with groups such as the American Red Cross and local emergency operations centers.
- amateur service
- A radio communication service for the purpose of self-training, intercommunication, and technical investigations carried out by amateurs.
- amateur television (ATV)
- Analog fast-scan television using commercial transmission standards (NTSC in North America).
- American Radio Relay League (ARRL)
- The national association for amateur radio (
www.arrl.org). ...
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