Icom IC-7850 Instruction Manual - Page 2

Previous view FOREWORD Thank you for choosing the IC-7850. The IC-7850 has many built-in high technology circuitry and unique functions, such as the Dualwatch on the Main and Sub bands, a high speed spectrum scope scan, a high-resolution waterfall screen, and many other outstanding features. The internal frequency signals in a radio utilizing a PLL are not always sufficiently pure. This results in a considerable number of unwanted spurious components, called phase noise, in its frequency spectrum. We focused intensively in drastically reducing the phase noise of LO (Local Oscillator) because the phase noise degrades the interference rejection and noise characteristics of the receiver. As a result, we succeeded in developing an LO with high purity outputs so that results in an RMDR (Reciprocal Mixing Dynamic Range) of 101dB with newly developed 1.2kHz Optimum Roofing Filter. Currently no competitors have been able to achieve this extremely high result performance. We believe we would not have been able to exceed the standard specifications without our full focus on LO purity. In addition, Icom that has chosen to base the IC-7850 on an up-conversion, double super-heterodyne receiver design, which has many advantages over traditional receiver designs. We are proud to have developed the IC-7850 for your amateur radio activities, and hope it brings you years of enjoyable operation. Please read this instruction manual thoroughly before using the IC-7850. i