The center frequency of thepre-selector is manually adjustable from theDIGI-SEL tuning knob on the front panel. Itautomatically tracks the intended signal keepingthe pre-selectors bandwidth centered on the op-erating frequency. Rived from out of band interference such as multi-multi operation or strong broadcast stations. The pre-selector works between 1.5MHz and30MHz and rejects distortion components de. You can se-lect the filter widthsfrom 15kHz and6kHz, depending onoperating mode. Beforethe 1st amplifier, the IC-7800s two roofing filtersblock strong adjacentsignals. The mechanical relay reduces sec-ondary distortion at the primary stage of signalprocessing.Ĭontesters know how frustrating it is to experi-ence a strong adjacent signal thats blocking thereceiver from pulling out a weaker signal. The IC-7800 uses durable mechanical relays forBPF switching instead of non-linear semi-con-ductors, like switching diodes which can causedistortion. This al-lowed us to explore new technical dimensions. A first in Ham radio! To achieve this su-perior receiver performance, Icoms engineeringteam completely re-engineered the whole analogcircuit and matched it to the DSP units.
Icoms considerable analog RF circuit experi-ence combined with cutting-edge digital technol-ogy results in an astonishing 110dB receiverdynamic range and a +40dBm IP3 in the HFbands. Simply put, Icom has developed the ultimate Amateur HFtransceiver. The IC-7800 is an artistic fusion of over 40 years analog RFcircuit development expertise and cutting-edge digital technology.The result is TWO identical receivers with 110dB dynamic range,+40dBm 3rd order intercept point, and unmatched DSPtechnology in the HF bands something that has never beenachieved in Ham radio! The IC-7800 will beviewed as the pinnacle radio for years to come. It takes amateurradio to a whole new level of performance. Some oftodays operators still feel the IC-781 is the pinnacle in amateurradio design. The IC-781 set benchmarks back in the1980s as that generations ultimate HF transceiver. The IC-7800s somewhat familiar looks will remind many HFoperators of the IC-781. Starting with thefirst analog PLL circuit in the IC-200 to the ground-breaking 32-bit DSP technology used in the IC-756PRO, Icoms developedsome of the most innovative radio equipment ever made.Continuing with this tradition, Icom announces the ground-breaking IC-7800! Icom is a pioneer in the amateur radio world. From 40 years of RF design expertise comes the Masterpiece Ham Radio TransceiverĭSP Circuit2nd mixer(Image rejection mixer)
0 kommentar(er)
