Nissan 4×4 & Off Road Parts Blog

The IC-7800Â’s somewhat familiar looks will remind many HF operators of the IC-781. The IC-781 set benchmarks back in the 1980Â’s as that generationÂ’s ultimate HF transceiver. Some of todayÂ’s operators still feel the IC-781 is the pinnacle in amateur radio design. They have not seen the IC-7800. It takes amateur radio to a whole new level of performance. The IC-7800 will be viewed as the pinnacle radio for years to come. The IC-7800 is an artistic fusion of over 40 years analog RF circuit development expertise and cutting-edge digital technology. The result is TWO identical receivers with 110dB dynamic range, +40dBm 3rd order intercept point, and unmatched DSP technology in the HF bands something that has never been achieved in Ham radio! Simply put, Icom has developed the ultimate Amateur HF transceiver. No one else comes close!

 

The IP3 performance of a radio can be improved by sacrificing sensitivity, but Icom considers this a poor choice. To achieve REAL high-performance, Icom reviewed all of the analog receiver circuitry. The IC-7700 employs mechanical relay BPF switching, a digitally tuned pre-selector, and three Hi-spec 1st IF filters (roofing filter) in a Dynamic range characteristics (in 14MHz band) clean and simple double-conversion superheterodyne design. By balancing the analog and DSP functions, the IC-7700 provides superior sensitivity simultaneously with a superb dynamic range of 110dB, and +40 dBm IP3 (even in USB mode with 2.4 kHz filter bandwidth).

 

The latest DSP technologies developed for the IC-7800/7700 plus over 45 years of analog circuit expertise give the IC-7600 the performance advantage. The flagship&#39s lineage: dual DSP units, 3kHz 1st (roofing) filter, double-conversion superheterodyne, all direct descendents of the IC-7800/7700. ?Dual DSP: Separate DSP units for transmitter/receiver and spectrum scope. ?Ist IF Filter: Three built-in 1st IF (roofing) filters – 3, 6 and 15 kHz. ?Receiver System: The double-conversion superheterodyne system and the image rejection mixer improve inband IMD. ?Display: 5.8-inch WQVGA (400×240 pixels)ultra-wide viewing angle TFT display with long-life LED backlighting. ?Spectrum Scope: High-resolution real-time spectrum scope using a dedicated DSP unit. ?USB Connectors: Easily connect keyboards, flash memory drives and PCs. ?PSK Operation: Built-in PSK and RTTY operation with a USB keyboard – PC not required.