# LimeSDR-USB TX and RX antenna ports

**URL:** <https://discourse.myriadrf.org/t/limesdr-usb-tx-and-rx-antenna-ports/7456>\
**Category:** LimeSDR\
**Created:** [14 December 2021 17:28 UTC](https://discourse.myriadrf.org/t/limesdr-usb-tx-and-rx-antenna-ports/7456 "2021-12-14T17:28:31Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![yeoenghoejason](https://avatars.discourse-cdn.com/v4/letter/y/e47774/32.png) [@yeoenghoejason](https://discourse.myriadrf.org/u/yeoenghoejason)\
**Post date:** [14 December 2021 17:28 UTC](https://discourse.myriadrf.org/t/limesdr-usb-tx-and-rx-antenna-ports/7456/1 "2021-12-14T17:28:31Z")

</div>

I understand that LimeSDR consists of 6 RX (RX1\_H, RX2\_H, RX1\_L, RX2\_L, RX1\_W, RX2\_W) and 4 TX (TX1\_1, TX2\_1, TX1\_2, TX2\_2). My question here is that how do I configure the setting in the UHD USRP Source/Sink block inside GNURadio Companion?

I kept gettting this error as shown below:  
RuntimeError: SoapyLMS7::setAntenna(TX, RX2) - unknown antenna name

How do I rectify it?

---

<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:** [20 December 2021 09:31 UTC](https://discourse.myriadrf.org/t/limesdr-usb-tx-and-rx-antenna-ports/7456/2 "2021-12-20T09:31:53Z")

</div>

> [@yeoenghoejason](#):
>
> My question here is that how do I configure the setting in the UHD USRP Source/Sink block inside GNURadio Companion?

We don’t support using UHD and would suggest using gr-limesdr instead.

> **[GitHub - myriadrf/gr-limesdr: gr-limesdr Plugin for GNURadio](https://github.com/myriadrf/gr-limesdr)**
>
> gr-limesdr Plugin for GNURadio. Contribute to myriadrf/gr-limesdr development by creating an account on GitHub.