name: SGH
full_form: Standard Gain Horn
context: factor to be fixed and avoids defining an OTA definition of an active transceiver unit which is difficult without the ability to count TAB connectors. AAS BS with small numbers of TRXUs should retain a conducted interface and are classified as hybrid AAS BS. The RF TX outputs are distributed to the AA via a RDN. The RXU performs the reverse of the TXU operations. The RDN performs the distribution of the TX outputs into the corresponding antenna paths and antenna elements, and a distribution of RX inputs from antenna paths in the reverse direction. The TXU and RXU can be separated and can have different mapping through the RDN towards the AA. For the hybrid AAS BS the transceiver array boundary (TAB) is the point(s) at which the TRXUA is connected to the RDN. The point where a TXU or RXU connects with the RDN is equivalent to an "antenna connector" of a non-AAS BS and is called TAB connector. The TAB connector is defined as conducted requirement reference point. The transmitted signal
description: The Standard Gain Horn (SGH) is an antenna used as a reference in the calibration process for measuring path loss in a Compact Antenna Test Range setup. It serves as a known gain reference to compensate for losses and mismatches during measurements.
explanation: The context describes the SGH's role in a specific measurement procedure within a technical specification document (3GPP TS 37.842). The description of its use as a calibration tool and reference antenna does not fit neatly into categories like Network Function, Protocol, or Technology.
section_title: 10.3.1.1.3	Compact Antenna Test Range
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