# Antenna diversity AT command help **URL:** \ **Category:** MC/EM Series\ **Created:** [December 20, 2021, 9:04pm UTC](https://forum.sierrawireless.com/t/antenna-diversity-at-command-help/25803 "2021-12-20T21:04:12Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Jgsieve1](https://avatars.discourse-cdn.com/v4/letter/j/898d66/32.png) [@Jgsieve1](https://forum.sierrawireless.com/u/Jgsieve1)\ **Post date:** [December 20, 2021, 9:04pm UTC](https://forum.sierrawireless.com/t/antenna-diversity-at-command-help/25803/1 "2021-12-20T21:04:12Z")
I’m looking at doing some testing with just two antenna connections on my em9190 with AT&T. i beleive i need to input the command below, but concerned if this will leave main, and aux enabled for both lte and 5g. AT!RXDEN=0 to enable just priamry (does aux still work?) AT!RXDEN=2,2 to enable aux as primary (means only aux works?) I am unsure i have the syntax correct, because the first option shows as below Parameters: \ (Component carrier ID) I’d like to test having just main and AUX connected, and not mimo 1 or 2 any help is appreciated, thanks! ---
**Author:** ![Donald](https://avatars.discourse-cdn.com/v4/letter/d/ac8455/32.png) [@Donald](https://forum.sierrawireless.com/u/Donald)\ **Post date:** [December 29, 2021, 10:26am UTC](https://forum.sierrawireless.com/t/antenna-diversity-at-command-help/25803/2 "2021-12-29T10:26:40Z")
Hi Jgsieve1 , You can configure AT!RXDEN=2,2 for main and AUX connection only, not MIMO 1 or 2. Please note: reset required to apply changes. ---
**Author:** ![Donald](https://avatars.discourse-cdn.com/v4/letter/d/ac8455/32.png) [@Donald](https://forum.sierrawireless.com/u/Donald)\ **Post date:** [December 30, 2021, 1:54am UTC](https://forum.sierrawireless.com/t/antenna-diversity-at-command-help/25803/3 "2021-12-30T01:54:18Z")