Hi,
It's said in the Awr1642's datasheet that 'the band-pass IF chain has configurable lower cutoff frequencies above 175 kHz and can support bandwidths up to 5 MHz'. And there are two high-pass filters(hpf) whose cutoff frequencies are configurable and their available corner frequencies are different.
My questions are as follow:
1. Are the lpf cutoff frequencies configurable? If not, will the the lpf cutoff frequency adjust automatically according to the ADC sample rate? If the ADC sample rate is 3MHz, will any high frequency signal alias back in the pass-band?
2. Why there are two high-pass filters? Are they for I and Q channel respectively? Why do they have different available frequencies? Should they be configured to the same cutoff frequency?
3. Can we disable the high-pass filters?
Thanks a lot!
Frank