The DIGI-SEL is especially useful for multi-transmitter operation and near strong broadcast stations by reducing the 2nd, 3rd, and even higher order IMD components from other stations. While the pre-selector's pass-band remains centered on the operating frequency, on the fly adjustments are possible via front panel controls. The DIGI-SEL (digital pre-selector) is a very narrow, user adjustable, pass band filter designed to automatically track the operating frequency, attenuating interference from out-of-band signals. Rather than using switching diodes that can introduce distortion, the IC-7700 design utilizes high-grade mechanical relays along with large capacitors and toroidal coils resistant to magnetic saturation, providing superior linearity, and greatly reducing distortion. While some may lead you to believe that coils and capacitors are all created equal, at Icom we know design excellence. Inband IMD characteristics Band pass filter You'll notice the difference as you copy weak signals without internal distortion or noise. The improvement will be especially evident in CW mode. All (2nd, 3rd or even higher) orders of IMD performance are superior in the IC-7700. In-band IMD (Intermodulation Distortion) creates undesired spurious signals as a consequence of non-linear processing of multiple signals. This reduces distortion and produces a much cleaner audio signal compared to triple or quadruple superheterodyne receivers. While multiple IF stages can become a source of distortion products and spurious responses, the IC-7700 utilizes Icom's original image-rejection mixers in a simple double conversion superheterodyne. For best performance, I suggest you use the highest speed available. The interface is designed to work at all baud rates supported by your radio.
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#ICOM CI V SOFTWARE HOW TO#
Refer to your radio's manual on how to do this.
#ICOM CI V SOFTWARE SOFTWARE#
Ensure the CI-V address of your radio is set to the factory default otherwise your chosen software will not communicate with your radio. To connect to a computer, you must purchase the Icon interface for $140, and a soundcard interface for $100 - OR NOT! This circuit will cost perhaps $25 (with case and cables and plugs) and does all these neat things. The 706 has the usual 1/8 th ″ CI-V remote control jack. To achieve REAL high-performance, Icom reviewed all of the analog receiver circuitry. Icom IC-7700 110dB dynamic range and +40dBm 3rd order Intercept Point (IP3) The IP3 performance of a radio can be improved by sacrificing sensitivity, but Icom considers this a poor choice. IC-7700 Memory R/W CI-V Command Structure - KI4KQ - 3. KI4KQ cannot be held accountable for any problems or damages encountered by using this information. This information provided by KI4KQ is hopefully correct, but no guarantee is offered nor implied. Returns the usual IC-V response of OK or NG. * Measurements were made using custom equipment, due to the limits of normal signal generators (SG) and duplexers to +85 dBm.
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The endless pursuit of leading analog circuit engineering makes it possible to achieve this leading edge level of performance.
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Better than +110dBm 2nd order intercept point (IP2)Īn IP2 point of more than +110 dBm* means the 2nd order distortion from strong broadcast stations will be completely eliminated. By balancing the analog and DSP functions, the IC- 7700 provides superior sensitivity simultaneously with a superb dynamic range of 110 dB, and +40 dBm IP3 (even in USB mode with 2.4 kHz filter bandwidth). The IC-7700 employs mechanical relay BPF switching, a digitally tuned pre-selector, and three Hi-spec 1st IF filters (roofing filter) in a clean and simple double-conversion superheterodyne design. The IP3 performance of a radio can be improved by sacrificing sensitivity, but Icom considers this a poor choice. 110dB dynamic range and +40dBm 3rd order Intercept Point (IP3)