The actually most comprehensive SDR software
supports (from version 070 ) direct frequency tuning for the DRB 32. At first using
the optional USB adapter DRB USB ADP.
The author Bernd Reiser has designed an easy-to-use
and well-structured software.
This software is getting better and better,
also with the help of users that do care to send feedback.
SoDiRa includes two different spectral display
windows. The upper display shows the complete input frequency range, while the
display below allows variable resolution & zooming (+/-).
Four different receiving modes ( AM, FM,
DRM & DCF77 ) can be selected (demod / decode selector ).
It is also possible to call up an additional
dialogue menu (dialog) with further features & informations.
SoDiRa has an own DRM decoder implemented. When
activating DRM the software recognizes an DRM signal automatically and tries to
Correct locking of MSC,
SDC & FAC is signalized by according green traffic
lights. Additionally the display shows the station name and program description.
The actual signal-to-noise ratio (SNR est.)
value is determined very quickly. It also takes a very short time to lock in after
short-time interruptions caused by insufficient SNR.
It is also possible to generate an optional
SNR log file (logswitch) for documentation
of the according SNR values (mean, min & max) for long-time monitoring.
Amplitude modulation: AM env (envelope
demodulation), AM syn (synchronous demodulator),
In case of a distorted sideband, synchronous
demodulation is also possible for only lower (ASL) or upper (ASU) sideband.
An interesting experience delivers AM stereo,
which is a pseudo-stereo mode and is hard to describe. Try it out for yourself.
Single side band / SSB: LSB, USB
Numerous filter bandwidths are selectable and
also a noise cancelling function (noise) is provided.
An extra sub-menu is available for frequency
An interesting feature of SoDiRa is the implemented
DCF77 is a precise atom clock synchronized time
signal. It is transmitted via long-wave from Frankfurt/Main in Germany and reception
is possible up to 2000km distance throughout Europe.
Radio-controlled clocks are using the same operating
In combination with the DiRaBox frequency is
set to 77.5KHz = 0.0775MHz. Synchronization is achieved for SNR values of about
20dB or more and after a few minutes the display shows the actual time & date.
SoDiRa permitts also optional synchonization
with the internal PC clock.
Direct frequency tuning of the DRB 30 &
32 is possible via mouse or by keybord.
Alternative tuning is also possible via Up/Down
push-buttons. Step width (step) via < & > push-buttons.
Simultanous recording of the received transmission
is possible with the integrated audio recorder (wave file).
The according push-buttons are play, stop
& rec .
Sceenshot concerning configuration menu (config)
in combination with DRB 30 & 32:
Selected receiver (receiver type) is
Port Type is at first FTDI USB via USB