I have a following request.
Latest MATLAB filter design wizard 3.0 is used for creating 4 MHz low-pass filter.
9.ftr file is saved to the USB drive. Then it is used for FIR configuration in IIO Scope.
When half-band filters are not used I get normal spectrum. Data rate is 12.288 MSPS.
When 8x half band filters are switched on in debug tab (0xCC in Register 0x2):
I get following spectrum:
When I write 0xDE to Registers 0x2 and 0x3:
And write 0x03 to Register 0xA:
Where is my mistake? Why when I turn on the HB filters I get distorted spectrum of my signal? Could you please help me to resolve the issue?
My created 9.ftr file you can find in attachment. Xilinx Zync 702 + AD-FMCOMMS3-EBZ is used for evaluation.