Technical basics
3.4 iREF
SCALANCE W780/W740 to IEEE 802.11n Web Based Management
Configuration Manual, 03/2015, C79000-G8976-C267-08
43
Restrictions
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A maximum data rate of only up to 150 Mbps (MCS 0 - 7 or 1 x spatial stream) is possible
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iREF cannot be used along with other iFeatures (for example iPCF or iPCF-MC)
Advantages
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Due to the directional data transmission and dynamic deactivation of antennas that do not
radiate in the direction of the particular client, interference can be reduced.
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The signal strength is improved because the active antenna always has the maximum
permitted transmit power available.