Icom began selling the IC-7851 in 2015. The IC-7851 is an HF and 6 meter transceiver that features narrower roofing filters and a dedicated DSP unit for the Fast Fourier Transform (FFT) spectrum. Here are some of the IC-7851's features: Narrower roofing filters: The IC-7851 uses narrower roofing filters to meet current standards for top-performing rigs. DSP unit: The IC-7851 uses a dedicated DSP unit for the FFT spectrum. Dual scope function: The IC-7851's 2250 MFLOPS DSP processor enables a dua

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