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Filter preset screen |
The digital IF filter has superior filtering performance and a distinguished
shaping factor that demonstrates the power of 32-bit floating point
DSP. The digital filter is completely free from deterioration due
to deviations in band characteristics, temperature change, or mechanical
vibration, all of which have likely been seen with analog filters.
The digital IF filter also provides excellent ripple characteristics
and clean cut that have never been available with analog filters.
The filter shape is selectable from soft and sharp, depending on the
purpose, operating band, band conditions, etc. It is also possible
to set CW and SSB filter characteristics independently, and also select
the filter shape while actually receiving a signal.
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Manual Notch (Wide/Middle/Narrow) |
The IC-7800's manual notch filter shape can be set in 3- steps for
the various receiving conditions. The manual notch filter has extremely
sharp characteristics for processing in the DSP and provides tremendous
performance for attenuation levels of more than 70dB in all shapes.
The DSP-based manual notch provides stable performance and completely
shuts off undesired beat signals without affecting AGC gain. In addition,
an automatic notch filter tracks and wipes off the beat signal and
RTTY interference.
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32-bit Floating
point DSP chip |
The IC-7800 uses four pairs of 32-bit floating point DSP units and
24-bit AD/DA converters. One for the transmitter, one for each receiver,
and the final one for the spectrum scope. The DSP units deliver the
phenomenal performance of the digital signal processing. A powerful
combination born of Icom乫s analog RF technology and experience.
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PA Unit and large
heat sink |
The newly designed push-pull power MOS-FET amplifiers work with 48V
DC and provide a powerful 200W of output power at full duty cycle
with low IMD in all bands. The digital PSN modulator using a dedicated
DSP unit consistently reproduces an outstanding signal-to-noise ratio,
providing clean and clear transmission.
Your IC-7800 will be the reference point on the band with a standard
stability of &plusml;0.05ppm! Even on the 6m band, that is less
than 3Hz error from the Oven Controlled Crystal Oscillator! Also,
a 10MHz reference frequency can be the input/output for external equipment.
OCXO Unit |
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Reference input/output
connector |
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RTTY Decode screen |
The IC-7800 has a modulator and demodulator for the 2 major HF ham
digital modes. Encode and decode of PSK31 and Baudot RTTY signals
are possible by simply connecting a USB keyboard to the IC-7800. The
twin peak audio filter improves RTTY reception. In addition, transmitted
and received messages can be stored to the CF memory card and transferred
to your PC.
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