This should also help.
BW (mouse wheel adjustment): Set the bandwidth of notch filters 1-4. Use the mouse wheel to adjust
these values
FREQ (mouse wheel adjustment): Set the center frequency of the notch filters 1-4 in Hz. Use the mouse
wheel to adjust these values
N1-N4: This corresponds to each notch filter NCH1 - NCH4 (notch filters 1-4). Please look at Page 27 of
the SDRuno Manual for enabling the notch feature.
http://www.sdrplay.com/docs/SDRplay_SDR ... Manual.pdf
AM SOFT FILTER (button): Clicking the "SOFT" button to activate the AM mode soft filter.
FC (mouse wheel adjustment): Specify the cutoff frequency of AM soft filter. Use the mouse wheel to
adjust this value.
AGC (slider): Adjust the AGC threshold by sliding to the left and right.
NB (slider): Adjust the threshold of the noise blanker by sliding to the left and right.
NR (slider): Adjust the threshold of noise reduction by sliding to the left and right.
CWPK (slider): Adjust the threshold of CWPK (the function that automatically tunes to the peak of CW) by
sliding to the left and right.
FM DEEM (button): Clicking the "DEEM" button to activate the de-emphasis function. Select 50 uS or 75
uS: (50 uS for non-US regions and 75 uS for US regions).
AFC (button): Clicking the "AFC" button enables the automatic frequency tuning function.
MONO (button): Clicking the “MONO” button switches to mono reception mode.
FMS-NR (button): Clicking the “FMS-NR” button to activate Noise Reduction algorithm for FM stereo.
FMS-NR (slider): Adjust the FMS-NR threshold by sliding to the left and right.
PDBPF (button): Click to enable Pure Data Band Pass Filter.
LC & HC (mouse wheel adjustment): You can adjust the low cutoff “LC” frequency value and the high
cutoff “HC” frequency value. Use the mouse wheel to adjust these values.