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analyzer:hardware [2009/03/08 11:42]
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analyzer:hardware [2018/11/03 02:59] (current)
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 {{:​upm_scheme.png|}} {{:​upm_scheme.png|}}
  
-The capacitor C2 is usually not needed, it is used to remove interference if the signal source is a sensitive radio receiver.+The capacitor C2 is usually not needed, it is used to remove ​HF interference ​from the computer ​if the signal source is a sensitive radio receiver. 
 ===== IR-Remotes ===== ===== IR-Remotes =====
 Infrared remote controls is a typical example on protocols that can be decoded. The protocols used are typically quite simple with pulse lengths around 1 ms. The signals are almost always AM-decoded over a base frequency of 38KHz. To decode the real signal we need a decoder. Fortunately,​ these decoders are very cheap and easy to use.  Infrared remote controls is a typical example on protocols that can be decoded. The protocols used are typically quite simple with pulse lengths around 1 ms. The signals are almost always AM-decoded over a base frequency of 38KHz. To decode the real signal we need a decoder. Fortunately,​ these decoders are very cheap and easy to use. 

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