Expert Electronics ColibriDDC receiver
Introduction
Distinguished custo ers! We would like to thank you
for choosing the production of Russian co pany
Expert Electronics! While the production of new HAM
devices we tried to take into account all the wishes of
our clients and to i ple ent the in the ost
advanced anufacturing and digital techniques of
signal processing.
Now the develop ent of digital technologies as the
application to the HAM practice allows to i ple ent
the best hardware characteristics of digital
transceivers and receivers. Our experience in the
sphere of digital signal processing allows to pursue
the excellent sound quality and the opportunities for
clearing the signal fro noise.
The software ethods of hardware controlling allow
to configure the controlling of the receiver and the
transceiver flexibly based on your own preference.
Now in front of you is one of the ost advanced and
perfect receivers produced in the recent decade.
We would like to bring your attention a new
ColibriDDC receiver, which is produced in accordance
with the DDC technology. DDC technology eans the
usage of direct sa pling of signal fro the antenna
and the digital conversion of the signal down.
The principle is based on the digital sa pling of the
wide spectru of signals practically directly fro the
antenna, signal thinning and software signal bearing
“down the frequency”. The signal is software
processed. The necessary odulation type is decoded
and the i age of the panora a of the necessary
spectral band is also for ed. The known ethod of
the direct signal transfor ation fro HF to LF is used
as the basis. In distinction fro the previous
generation of SDR receivers and transceivers, where
the signal transfor ation of the orthogonal
(quadrature) signals was held on the hardware level,
the software bearing is applied in new receiver. It
allows to suppress the inactive sideband, carrier
frequency and i age channel practically ideally.
The band of the displayed frequency spectru in the
classical technology of the SDR- receipt with signal
conversion on the sound IF was bounded by the band
of signal conversion of the sound card. Now when the
whole spectru of the short-wave band is digitized, it
is possible to display any band within the digitization
li its.
But that is not all! The a ount of possible physical
receivers is not li ited by one receive path. In
ColibriDDC there were i ple ented 4 software
receivers and also there is an opportunity to
si ultaneously observe the whole SWB.
Absence of IF signal conversion and digital
de odulation algorith s allow to receive the
qualitative pure signal at the receiver's output.
Except onitoring with good visualization, the
receiver's controlling progra allows:
•to record the high qualified input signal;
•to record the air station in the frequency
bandwidth and to reproduce it later;
•choose any filter pass band fro 10 Hz to 20
kHz with a good ra p;
•control any odulation odes, including the
receipt of the radio stations of digital
broadcasting standard DRM (using third party
software).
With the introduction of new ColibriDDC receiver
ca e a new ti e for the radio a ateurs who work in
VHF. The receiver's software allows to watch the
presence and activity of the radio stations in VHF and
UHF bands with any odulation type and bandwidth
to 62 MHz.
Over the recent years the attention of a large nu ber
of radio a ateurs was attracted by the SDR the e.
During the previous several years there were found
both advantages and disadvantages of the classical
SDR-technology. The large ajority of the found
disadvantages was excluded by igration to the
technology of direct signal digitization. Now we can
declare that the receiver is ideal.
The big brands who produce the hardware for special
application are interested in DDC technology. So, for
exa ple, the SDR and DDC technologies are used in
obile co unication technology, ilitary
co unication technology, wireless network
hardware and that's not a full list.
So let's co e to the description of the ColibriDDC
receiver, which is offered by Expert Electronics.
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