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Dstar ambe codec version7/29/2023 One of the worst examples of interference was a hotspot sitting on the input frequency of a satellite transponder. For example, a hotspot showed up on the 70 cm SSB calling frequency, 432.100 MHz. Unfortunately, there have been situations where radio amateurs arbitrarily chose hotspot frequencies that caused interference with existing radio activity. They allow a radio amateur to have a local RF connection into one of the extensive radio networks (e.g., Brandmeister). A big trend in ham radio activity is the use of internet-connected transceivers commonly referred to as hotspots. These devices often use one (or more) of the popular VHF/UHF digital formats (DMR, D-STAR, Fusion) but analog FM is also used.
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