XTRX v.1.3 sampling rate

Projects LimeSDR
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I would like to use the XTRX v.1.3 with 2 Rx and 1 Tx. The maximum sampling rates for Rx is a little confusing. In this link: Lime Microsystems | LimeSDR XTRX, it says for SISO, the sampling rate is 120 MSps with a bandwidth of 120MHz (I assume that there is a filter that is configurable by the software on the front-end of the SDR), and for MIMO is 90MSps. So for 2 Rx, 1 Tx, is this 90MSps total (so 30MSps per channel Rx and Tx), or 90MSps each? If I don’t use Tx, and only 2 Rx, what would the sampling rate per channel be?

The other confusing issue is that, at this link: LimeSDR XTRX v1.3 Board — LimeSDR XTRX Boards 23.01 documentation, it says the sampling rate is 30.72MSps for MIMO.

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Hi, the XTRX maximum sampling rates for each direction are 122.88MSps for SISO, and 61.44MSps for MIMO.
In your case 2Rx+1Tx, or just 2Rx is MIMO.

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Hi Ricardas,

Could you please clarify the source of these limits?

So 90MSps in MIMO is just a markerting? I can count only on 61.44 per channel?