Description 
  2.4 IEEE 802.11n 
SCALANCE W780/W740 to IEEE 802.11n Web Based Management 
Configuration Manual, 08/2018, C79000-G8976-C267-13 
31 
The guard interval of IEEE 802.11a /b/g is 800 ns. IEEE 802.11n can use the reduced guard 
interval of 400 ns. You specify the guard interval on the WBM page "AP 802.11n 
(Page 285)".  
Modulation and coding schemes 
The IEEE 802.11n standard supports different data rates. The data rates are based on the 
number of spatial streams, the modulation method and the channel coding. The various 
combinations are described in modulation and coding schemes.