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SunSDR2 DX User Manual
© 2020 Expert Electronics
ExpertSDR2 SOFTWARE DESCRIPTION
Release - this is the period, required for the signal level to be restored to the default value.
Type - there are 3 types of pre-proc algorithm, where the 1st is the most aggressive and the 3rd
is the least aggressive.
I nput Boost – preamplifying of the input signal before limiter processing.
Paramet ric f ilt er module with graphic display of the summed AFC (amplitude-frequency
characteristic – white line) and AFC of each filter. Simultaneously you can use up to 5 filters.
Available filter types:
Lowpass – Low Pass Filter (LPF). This filter passes signals with a frequency lower than a
certain cutoff frequency. Cutoff frequency is determined by Frequency. Qualit y determines
steepness of the filter slope.
Highpass – High Pass Filter (HPF). This filter passes signals with a frequency higher than a
certain cutoff frequency. Cutoff frequency is determined by Frequency. Qualit y determines
steepness of the filter slope.
Bandpass – this filter passes frequencies within a certain range (band) and rejects frequencies
outside that range. Cutoff frequency is determined by Frequency. Qualit y determines
bandwidth of the passband.
Not ch – it is a band-stop filter with a narrow stopband. It rejects a specific range of frequencies
and passes all the other frequencies unaltered. Tuning frequency is determined by Frequency.
Qualit y determines the stopband bandwidth.
Peak – also known as bell filter. This filter has similar functionality with the Notch filter, but has
more flexible settings. It boosts or cuts the chosen frequency by G ain value, affecting the
surrounding frequencies in a bell-shaped curve. Tuning frequency is determined by Frequency.
Qualit y determines the cutoff bandwidth.
Low Shelf – this filter cuts or boosts signals of frequencies below the cutoff frequency,
determined by Frequency. G ain value determines attenuation or boost level of frequencies
below the cutoff frequency. Frequencies above filter’s AFC will not be altered.
High Shelf - this filter cuts or boosts signals of frequencies above the cutoff frequency,
determined by Frequency. G ain value determines attenuation or boost level of frequencies
above the cutoff frequency. Frequencies below filter’s AFC will not be altered.
Summary of Contents for SunSDR2 DX
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