# About the LimeSDR category

**URL:** <https://discourse.myriadrf.org/t/about-the-limesdr-category/290>\
**Category:** LimeSDR\
**Created:** [29 April 2016 05:50 UTC](https://discourse.myriadrf.org/t/about-the-limesdr-category/290 "2016-04-29T05:50:52Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![andrewback](https://avatars.discourse-cdn.com/v4/letter/a/22d042/32.png) [@andrewback](https://discourse.myriadrf.org/u/andrewback)\
**Post date:** [29 April 2016 05:50 UTC](https://discourse.myriadrf.org/t/about-the-limesdr-category/290/1 "2016-04-29T05:50:53Z")

</div>

This category is for discussion concerning the LimeSDR family of boards.

Please post any LimeSDR questions and suggestions here.

Thanks!

---

<div class="post-metadata">

**Author:** ![Ghizlane](https://avatars.discourse-cdn.com/v4/letter/g/3bc359/32.png) [@Ghizlane](https://discourse.myriadrf.org/u/Ghizlane)\
**Post date:** [23 September 2017 15:52 UTC](https://discourse.myriadrf.org/t/about-the-limesdr-category/290/2 "2017-09-23T15:52:55Z")

</div>

I have an issue whereby OAI UE doesn’t camp to OAI eNB using Lime SDR. The UE exit with this error “No cell synchronization found, abandoning”. I wonder if you could help me to progress on this and It would be much appreciated.

I have 2 Lime SDRs one connected to eNB, the other to UE. for the eNB I run these commands:  
./build\_oai -w LMSSDR --eNB --noS1 -x -c

sudo -E ./lte\_noS1\_build\_oai/build/lte-softmodem-nos1 -O $OPENAIR\_TARGETS/PROJECTS/GENERIC-LTE-EPC/CONF/enb.band7.tm1.25PRB.lmssdr.conf --rf-config-file $OPENAIR\_TARGETS/ARCH/LMSSDR/LimeSDR\_above\_1p8GHz.ini \>\> ENB.log

for UE:  
./build\_oai -w LMSSDR --eNB --UE --noS1 -x -c

sudo -E ./lte\_noS1\_build\_oai/build/lte-softmodem-nos1 -U -C2680000000 -r25 --ue-scan-carrier --ue-txgain 100 --ue-rxgain 80 --rf-config-file $OPENAIR\_TARGETS/ARCH/LMSSDR/LimeSDR\_above\_1p8GHz.ini \>&1 | tee UE.log

If I look inside the Lime SDR, I can see that the antennas are connected to ports as shown below:

```
       antenna1 antenna2

       tx1-1 tx2-1

```

usb3  
antenna3 antenna4  
rx1-H rx2-L

so I connected tx2-1 of eNB SDR to rx1-H of UE SDR and tx2-1 of UE SDR to rx1-H of eNB SDR

Could you please advice how I can make the UE camp to the cell?

1. Is my connection of Lime SDRs correct? is the rf-config-file LimeSDR\_above\_1p8GHz.ini the correct one?

2. Do I need to change gain powers or anything else in the config file enb.band7.tm1.25PRB.lmssdr.conf?

3. Are ue-rxgain and ue-txgain set properly in the command line?