Improperly working Sample Rate Converter, the output signal has the unwanted images. If my calculations are correct? I may be something to consider? Please help solve my problem.
Fdac = 1800MHz;
Fbaud = 6,75MHz;
SRRC – enable;
Mapper – enable;
Interpolation factor N = 4;
Total interpolation ratio of the SRRC filter and the five half-band interpolation filters I = 2 * 2^4 = 32;
P/Q = Fdac / (Fbaud * 16 * I) = 100/192;
P = 0x640000;
Q = 0xC00000;
DCO divide factor N = 4;
Fdco = Fdac / (16 * N) = 28,125MHz;
When N = 2 no improvement occurs.
P.S. If we apply the P / Q = 0.5, all works very well, just not as Fbaud what is necessary.