I understand Ettus will only support certain sample rates, and I am on my own if I experience issues after changing them. With that being said, I am looking at the X410 sampling and from my understanding it looks like the sample rates are fixed at 2949.12 MHz and generated externally. I don't know what devices generate the sample clock, but I believe it's an LMK04832 and is managed from x4xx_sample_pll.py in MPM?
I am interested in changing the ADC sample rate from 2949.12 MHz to 3686.4 MHz. Both are integer multiples of 122.88 MHz, but I am unsure if the new Nyquist frequency of 1843.2 MHz versus the old Nyquist frequency of 1474.56 MHz will be an issue. I see the ZBX has the IF before the ADC set somewhere between 860-2250 MHz? Is that kind of being used as an upper or lower sideband with the Nyquist frequency somewhat in the middle? I couldn't find the schematics or a more detailed block diagram of the X410 online, so I figured I'd ask here. Any insight here would be appreciated, especially when it comes to the parts of software to add my new 3686.4 MHz sample rate. Thanks, Brian
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