Configuring with Web Based Management   
6.4 "Information" menu 
  SCALANCE W780/W740 to IEEE 802.11n Web Based Management 
166  Configuration Manual, 08/2018, C79000-G8976-C267-13 
 
 
The page displays the background noise of the channel. 
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Shows the name of the relevant antenna connector. 
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Shows the background noise of the set channel. 
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Shows the background noise of the extended channel (HT-40).