name: DFF
full_form: Direct Far Field
context: For RRM baseline measurement setup based on DFF: - The Far-field criteria defined for the DFF UE RF test method described in clause 5.2.1 can be applied. - A DFF measurement setup has the centre of the Quiet Zone (QZ) located at the centre of the rotational axes (of DUT and measurement antenna). For the RRM measurement baseline setup based on DFF, the vertices of the N probes have to be aligned to the resulting centre of the QZ. The centre of the QZ is taken as the reference point for MU definition for each probe. The same QZ size as for DFF UE RF test method described in clause 5.2.1 applies. For RRM baseline measurement setup based on simplified DFF: - The Far-field criteria defined for the simplified DFF UE RF test method described in clause 5.2.2 can be applied. - The same QZ size and definition as for simplified DFF UE RF test method described in clause 5.2.2 applies. For RRM baseline measurement setup based on IFF: - The Far-field criteria defined for the IFF UE RF test method
description: Direct Far Field (DFF) is a technology used in Radio Frequency (RF) testing and measurements. It is specifically used for determining far-field criteria and quiet zone sizes in various measurement setups. DFF is referenced in the 3GPP TS 38.810 specification as part of the procedures for conducting RF tests on user equipment (UE).
explanation: DFF is classified as a technology because it represents a specific method or approach used in RF testing, outlined within technical specifications like 3GPP TS 38.810. Its application in defining far-field criteria and quiet zones for accurate RF measurements further solidifies its technological nature.
section_title: 6.2.1.2Far-field criteria and Quiet Zone
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