Level control
A level control , usually called a fader, is an electrical, mostly passive, component used to variably attenuate a signal (see attenuator ).
Executions:
- mechanically
- voltage controlled
- digitally controlled
In audio technology , a level control means a volume control (fader).
In high-frequency technology , the input impedance and the output impedance of the level control are usually defined as 50 or 75 Ω and should be constant over the entire setting range. This requires three resistance sliding tracks, which are arranged in a Pi or T circuit .
In antenna systems, this component can be used to adapt the signal strength in an installation to the local conditions (line attenuation, reception strength).
literature
- Michael Dickreiter , Volker Dittel, Wolfgang Hoeg, Martin Wöhr (eds.): "Handbuch der Tonstudiotechnik". 8th revised and expanded edition, 2 volumes, Verlag Walter de Gruyter, Berlin / Boston 2014, ISBN 978-3-11-028978-7 .
- Andreas Friesecke: The audio encyclopedia. A reference book for sound engineers. Saur, Munich 2007, ISBN 978-3-598-11774-9 .
- Hans Jörg Friedrich: Sound technology for media designers. Hear sounds - understand technology - design media. Springer Verlag, Berlin / Heidelberg 2008, ISBN 978-3-540-71869-7 .
- Otger Neufang: Lexicon of Electronics. Friedrich Vieweg & Sohn Verlagsgesellschaft, Wiesbaden 2002, ISBN 3-528-04099-8 .
See also
Web links
- AUDIO - SIGNAL QUALITY ANALOGUE (accessed on October 20, 2017)