Carlos In reality, this can be understood as follows: When RDF (reference signal level) is increased, the SNR (signal-to-noise ratio) will also increase, making the signal easier to hear. The antennas we use in the low band, such as GP antennas, are a compromise based on factors like elevation angle, gain, and ease of installation. The low RDF is an unavoidable trade-off. If we could install long main masts with high gain multi-element Yagi antennas, similar to those used in the high band, then the need for individual RX antennas would be significantly reduced.
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