Bad port isolation doesn’t just lower SNR, it breaks the assumptions behind high-order QAM, causing optimistic MCS selection and forced fallback and retransmissions. IsoHorns leads the WISP industry in port isolation, while RF Elements port isolation is so bad they don't disclose it. This is especially important for radios like Ubiquiti LTU and Cambium ePMP 4500/4600 which can achieve high modulation rates like MCS 11 (1024-QAM) and MCS 13 (4K-QAM) when used with high quality antennas. | David D
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