Below is a comparison of the improvement over the IC-7800. The goal was to dramatically reduce the phase noise that degrades the target signal due to the sum of the entire signal present. RMDR: 110dB raising the barĭesign advances developed by the Icom HF engineers for the Local Oscillator (LO) enable the IC-7851 to set a new benchmark for amateur radio receivers. Adding this performance and functionality for both receivers give you a dual scope portal. In addition to the incredibly clean LO allowing you to hear the weak signals, the new spectrum scope design enables you to see the weak ones! Faster processors higher input gain, higher display resolution and a cleaner signal from the receiver’s LO will give you a new window into the RF world.
As a result of this design, the purity of the LO achieves a Reciprocal Mixing Dynamic Range (RMDR) of 110dB. With the design of the IC-7851, Icom’s engineers focused on a new Local Oscillator (LO) that drastically reduces the phase noise. However, what happens inside the radio with all those signals coming down your feedline can defeat all your efforts. Larger antennas, higher gain pre-amps and other devices in line are great. The Pinnacle of HF Perfection Solid design basics and HF expertise raising the barĬontesters and DXers are always looking for that competitive edge to magically pull out the weak signal that is either the rare country or multiplier they need to climb up the list.
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