# limeSDR USB, srsLTE, open5gs with 100 PRB MIMO

**URL:** <https://discourse.myriadrf.org/t/limesdr-usb-srslte-open5gs-with-100-prb-mimo/6998>\
**Category:** RAN Forum\
**Created:** [5 March 2021 05:12 UTC](https://discourse.myriadrf.org/t/limesdr-usb-srslte-open5gs-with-100-prb-mimo/6998 "2021-03-05T05:12:36Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![theboel](https://avatars.discourse-cdn.com/v4/letter/t/848f3c/32.png) [@theboel](https://discourse.myriadrf.org/u/theboel)\
**Post date:** [5 March 2021 05:12 UTC](https://discourse.myriadrf.org/t/limesdr-usb-srslte-open5gs-with-100-prb-mimo/6998/1 "2021-03-05T05:12:36Z")

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Hi All,  
I try to work with a combination of limeSDR USB, srsLTE, open5gs as far I do I can work MIMO with TM 4 PRB 50 without any problem but when I try PRB 100 I got a latency indication : LLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLRF status: O=0, U=0, L=49  
LLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLRF status: O=0, U=0, L=51  
LLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLRF status: O=0, U=0, L=50  
LLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLRF status: O=0, U=0, L=51

I try to change the pdsch\_max\_mcs from -1 to any value but not help. like mention here:  
[http://www.softwareradiosystems.com/pipermail/srslte-users/2018-January/001325.html](http://www.softwareradiosystems.com/pipermail/srslte-users/2018-January/001325.html)  
I just wondering is this not posiblle to do or I just need to do another adjustment ?  
any idea is welcome.  
best,  
Anton

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**Author:** ![andrewback](https://avatars.discourse-cdn.com/v4/letter/a/22d042/32.png) [@andrewback](https://discourse.myriadrf.org/u/andrewback)\
**Post date:** [6 March 2021 15:49 UTC](https://discourse.myriadrf.org/t/limesdr-usb-srslte-open5gs-with-100-prb-mimo/6998/2 "2021-03-06T15:49:15Z")

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If you don’t get any suggestions here it could be an idea to post to the srsLTE mailing list:

> **[Community - srsLTE](https://www.srslte.com/community)**
>
> Free and open source LTE software suite developed by Software Radio Systems