Author: SteeevO

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.

 

The FT-897D is a rugged, innovative, multiband, multimode portable transceiver for the amateur radio MF/HF/VHF/UHF bands. Providing coverage of the 160-10 meter bands plus the 6 m, 2 m, and 70 cm bands, the FT-897 includes operation on the SSB, CW, AM, FM, and Digital modes, and it&#39s capable of 20-Watt portable operation using internal batteries, or up to 100 Watts when using an external 13.8-volt DC power source. The new FT-897D version includes coverage of the U.S. 60-meter (5 MHz) band, along with the 0.5 ppm TCXO Unit, at no additional charge!