First, its display always seemed too dim (even with settings turned all the way up). With the latest design of the LO, the IC-7851 will become the new benchmark for Phase Noise with 150dBc/Hz at 10kHz offset and 140dBc/Hz even at 1kHz offset.I had 3 gripes with the IC-7800. IC-7600, IC-7610, C-7700, IC-7800, IC-7850, IC-7851 when checked, sets the transceiver's UTC date and time from your PC's date and time when Commander starts or when the transceiver is selected, and at the beginning of each subsequent hour Emit subreceiver audio when dual receive enabledIcom IC-7851 HF/50MHz Transceiver - The Pinnacle of HF PerfectionThe LOs C/N ratio excels beyond our competitors, and the noise components generated in both receive and transmit signals are reduced virtually below detection. Port: mingw32 support with gcc 3.4 version: Version 1.2.2: new models: Ten-Tec (Orion), AOR 3030, Yaesu FRG's, Skanti fixes: JRC NRD435 & NRD535, Drake, AOR3000, and. New models: IC-78, IC-7800, IC-R20, IC-756PROIII fixes: AOR 5k&8k: added S-Meter, 7030: fixed freq, IC-R8500: calibrated S-Meter, Jupiter and many others.
In addition to the incredibly clean LO allowing you to hear the weak signals, the new spectrum scope design enables you to see the weak ones! Faster processors higher input gain, higher display resolution and a cleaner signal from the receiver's LO will give you a new window into the RF world. As a result of this design, the purity of the LO achieves a Reciprocal Mixing Dynamic Range (RMDR) of 110dB. However, what happens inside the radio with all those signals coming down your feedline can defeat all your efforts.With the design of the IC-7851, Icom's engineers focused on a new Local Oscillator (LO) that drastically reduces the phase noise. Larger antennas, higher gain pre-amps and other devices in line are great. Also the IC-7800 has limited spectrum display settings, although this issue wasnt apparent until I purchased a Flex 6xxx series transceiver.Solid design basics and HF expertise raising the barContesters and DXers are always looking for that competitive edge to magically pull out the weak signal that is either the rare country or multiplier they need to climb up the list.
Crystal clear LO (local oscillator) designBreaking the boundaries of traditional designs, the IC-7851 employs a Direct Digital Synthesizer (DDS) along with a Phase Locked Oscillator for the LO. This newly developed filter overcomes the gap of a narrower roofing filter in an up-conversion receiver. The IC-7851 introduces a new 1.2kHz Optimum Roofing Filter, greatly improving the in-band adjacent signal performance. A flat consistent performance is delivered over a wider frequency range. In an up-conversion receiver, suppression of image interference and reduce distortion from electric components is easily overcome.
Audio scope functionThe audio scope simultaneously shows an oscilloscope and FFT for receive and transmit audio. The 2250 MFLOPS DSP processor enables a new dual scope function and significantly faster sweep speeds and better accuracy than in the IC-7800. Twice the speed, sensitivity, resolution and more controlFollowing the design linage of the IC-7800, the IC-7851 uses a dedicated DSP unit for the Fast Fourier Transform (FFT) spectrum. An impressive 20dB improvement is seen with the IC-7851's 10 kHz measurement and more than 30dB improvement at a 1 kHz measurement in comparison to the IC-7800. Improved phase noise characteristicsPhase noise is coherent in radio circuit design and the new LO design introduced in the IC-7851 makes some major breakthroughs while utilizing the 64MHz, up-conversion receiver design introduced in the IC-7800. This design significantly reduces noise components in both receive and transmit signals.
Specifications for the audio scope The processing power in the IC-7851 allows for dual mini band scopes as well as the audio scope. On receive, you can see the power of your filtering by watching filtering adjustments take out interfering signals including filter width and notch filter placement. The oscilloscope shows the CW waveform.
This allows you to see signals that may not be apparent on a normal scope. High resolution waterfall displayThe waterfall display captures signal strengths over time. The dual scope function is vital for watching for multipliers or band openings in contests, or working all bands/modes on a DXpedition. Sample rate: 1ms/Div, 3ms/Div, 10ms/Div, 30ms/Div 100ms/Div and 300ms/Div, 5 Div widthWhile you can watch both receivers on the scope of the IC-7800, within the limits of the scope bandwidth, the IC-7851 introduces the new dual scope – the ability of watching both receivers in separate spectrum scopes. Waveform color and drawing (outline or fill) settings for the FFT scope FFT scope with waterfall and FFT scope without waterfall
BPF switching: mechanical relaysOperational functionality for the most advanced operatorsThe IC-7851 incorporates two completely independent receivers, from the antenna inputs all the way through to the stereo headphone and individual external speaker outputs. A newly designed LO amplifier generates high output while keeping flat frequency characteristics over a 60MHz wide range. To achieve this superb receiver performance, the entire analog circuitry and components have been re-engineered to match the DSP units. Release the mouse button to return.Premium components yield premium performanceThe IC-7851 continues the +40dBm, 3rd order intercept point and 110dB receiver dynamic range benchmark set by the IC-7800. Right click to temporarily change the receive frequency.
The built-in Modulator/Demodulators are activated by via the radio's functions buttons or an optional USB keyboard. RTTY/PSK31 and PSK63RTTY, PSK31 as well as the new PSK63 modes are available at your finger tips without the use of a computer. When connected to external stereo headphone, main and sub receiver audio can be mixed or separated to the right and left.
Ic-7800 S-Meter Serial Number Counter And
Improved automatic antenna tunerThe automatic antenna tuner utilizes tune setting memories to record the best tuner configuration for the lowest SWR. For phone operation, you have a voice-saving auto repeat function. For CW, the memory keyer has timesaving functions like auto repeat, contest serial number counter and short Morse number functions. Record your CQ, station information or other items in one of 8 keyer memories for the CW and digital modes 4 memories for phone operation.
Switch to 80/160m and you want to use your beverage antenna for receive, but transmit on your vertical. Internal memory switchWith six antenna ports – two receive-only and four receive/transmit – the IC-7851 enables the operator to have fingertip control over a vast array of antenna configurations.
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