# XTRX v.1.3 sampling rate

**URL:** <https://discourse.myriadrf.org/t/xtrx-v-1-3-sampling-rate/8882>\
**Category:** LimeSDR\
**Created:** [14 July 2025 15:09 UTC](https://discourse.myriadrf.org/t/xtrx-v-1-3-sampling-rate/8882 "2025-07-14T15:09:48Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![vinsongo](https://avatars.discourse-cdn.com/v4/letter/v/3be4f8/32.png) [@vinsongo](https://discourse.myriadrf.org/u/vinsongo)\
**Post date:** [14 July 2025 15:09 UTC](https://discourse.myriadrf.org/t/xtrx-v-1-3-sampling-rate/8882/1 "2025-07-14T15:09:48Z")

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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](https://limemicro.com/sdr/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](https://limesdr-xtrx.myriadrf.org/v1.3/), it says the sampling rate is 30.72MSps for MIMO.

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**Author:** ![ricardas](https://yyz2.discourse-cdn.com/flex034/user_avatar/discourse.myriadrf.org/ricardas/32/86_2.png) [@ricardas](https://discourse.myriadrf.org/u/ricardas)\
**Post date:** [18 July 2025 11:32 UTC](https://discourse.myriadrf.org/t/xtrx-v-1-3-sampling-rate/8882/2 "2025-07-18T11:32:29Z")

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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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**Author:** ![cryo](https://yyz2.discourse-cdn.com/flex034/user_avatar/discourse.myriadrf.org/cryo/32/4720_2.png) [@cryo](https://discourse.myriadrf.org/u/cryo)\
**Post date:** [20 November 2025 13:37 UTC](https://discourse.myriadrf.org/t/xtrx-v-1-3-sampling-rate/8882/3 "2025-11-20T13:37:21Z")

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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?