Icom IC-7851 Quick Start Manual page 2

Solid Design Basics and HF Expertise
Raising the Bar
Contesters 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. Larger
antennas, higher gain pre-amps and other devices in line are great. However, what happens
inside the radio with all those signals coming down your feedline can defeat all your efforts.
With the design of the IC-7851, Icom's engineers focused on a new Local Oscillator (LO)
that drastically reduces the phase noise. As a result of this design, the purity of the LO achieves
a Reciprocal Mixing Dynamic Range (RMDR) of 110dB.
In addition to the incredibly clean LO allowing you to hear the weak signals, the new spec-
trum 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. Adding this performance and functionality for both receivers give
you a dual scope portal.
THE TRANSCEIVER
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