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SunSDR2 DX User Manual
© 2020 Expert Electronics
ExpertSDR2 SOFTWARE DESCRIPTION
- enable Automatic Notch Filter for adaptive rejection of the narrowband interference in
the receiving band (interference, carrier signals, CW signals, etc.).
Note:
·
If there are no interference, ANF could slightly affect the reception quality of the desired
signal. Disable ANF, if you don't need it.
- enable Analog Pick Filter, it creates the triangle filter's AFC (amplitude-frequency
characteristic) in the filter bandpass.
Note:
·
When filter BW is lower than 200 Hz, there is no point in APF, thus it is switched off
automatically.
- enable Digital Surround Effect for CW signals, it provides a space orientation in stereo
phones.
Note:
·
This algorithm provides panorama acoustic of the CW signals in the filter bandwidth,
depending on their position in the filter:
§
if the received CW signal is in the receive filter bandwidth and lower the tuned frequency, it
will be louder in the left phone;
§
if the received CW signal is in the receive filter bandwidth and higher the tuned frequency, it
will be louder in the right phone;
§
if the received CW signal is in the receive filter bandwidth and in the middle of the tuned
frequency, it will be equally loud in both ears.
- Enables/disables all set Notch Filters.
-
adds a new filter placing it inside the RX filter.
Notch Filter is the IIR filter, its quality depends on its width. On the panorama you can see the
result of the Notch Filter operation, it cuts out signals inside the filter.
Remove a required Notch Filter with a click of the mouse wheel or double-click of the right
mouse button. Tune and adjust the width of the Notch Filter the same way you do that for the
main RX filter. For fine-tuning rotate the mouse wheel with a 1 Hz step.
You can set up to 8 Notch Filters for each band. When you change the band you automatically
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