ADS54RF63: Technical issues

Hi Zhonghui,

Please let us know what is being used for the clock and analog input signals? A signal generator? If so, what model number signal generators are being used.

Also, is the analog input and clock filtered before connecting the signal generator to the EVM? If should be to help remove spurious and noise from the signal generator.

Lastly, the FFT results provided, are overlapped, pleas use a "bin centered or prime number" analog input frequency, so that the harmonics are not overlapped on top each other, this is not a valid FFT.

Regards,

Rob

Hi Rob,

Thank you for your help.

I just got the reply from customer.

1) the clock and the analog input signal is used?

Clock signal = 500 MHz
Ain = -1dBFS, Fin = 69 MHz
2) Signal generator?
3) If so, what type of signal generator used.

R&S®SMA100A Signal Generator - сlock and analog input

4) the signal generator is connected to the EVM entry before the analog 
input filtered and clock?
5) If there is a filter will help to eliminate the noise signal generator .


The clock signal is filtered through the NLP-550+.
The analog input signal is filtered through two series-connected BBP-70+.

6) Finally, provided by the FFT results overlap, please use the "bin 
centeredor prime number" analog input frequency, so that harmonic not to 
each other.

Thanks.

Best regards,