name: MPAC
full_form: Multi-Probe Anechoic Chamber
context: The minimum range length of FR1 MPAC system is defined as the distance from the centre of the test zone to the aperture of the measurement probes/antennas, as illustrated in Figure A.2.4-1. Figure A.2.4-1: Illustration of range length definition of FR1 MPAC The minimum range length for NR FR1 MPAC OTA systems with 20cm test zone size is 1.2m. While for MPAC systems, the far-field requirements do not have to apply, it was shown that the spatial correlation can be impacted significantly for distances below 1.2m.
description: A Multi-Probe Anechoic Chamber (MPAC) is a specialized test environment used for Over-The-Air (OTA) measurements. It provides a controlled setting to assess the performance of wireless devices by minimizing external interference and reflections.
explanation: An MPAC is classified as Testing Equipment because its primary function is to facilitate the testing and evaluation of wireless devices, rather than being a component of the network infrastructure or a communication protocol.
section_title: A.2.4Minimum Range Length
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