# Parameter needed to switch RX input in gnuradio for limesdr

**URL:** <https://discourse.myriadrf.org/t/parameter-needed-to-switch-rx-input-in-gnuradio-for-limesdr/703>\
**Category:** LimeSDR\
**Created:** [8 February 2017 15:16 UTC](https://discourse.myriadrf.org/t/parameter-needed-to-switch-rx-input-in-gnuradio-for-limesdr/703 "2017-02-08T15:16:29Z")\
**Posts on this page:** 1\
**Showing post:** 9

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**Author:** ![hTo137](https://avatars.discourse-cdn.com/v4/letter/h/ba8739/32.png) [@hTo137](https://discourse.myriadrf.org/u/hTo137)\
**Post date:** [12 March 2017 23:49 UTC](https://discourse.myriadrf.org/t/parameter-needed-to-switch-rx-input-in-gnuradio-for-limesdr/703/9 "2017-03-12T23:49:25Z")

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I am not sure how you know from the software side how to specify or differentiate the antennas for rx channel 0 vs. rx channel 1

> [@Selecting RF port on LimeSDR](https://discourse.myriadrf.org/t/selecting-rf-port-on-limesdr/868/5):
>
> Also see SoapySDRUtil --probe="driver=lime" to get the names of the ports. In this case, the names are based off of the LMS7, not the silkscreen, These are the options Rx Antennas: LNAH, LNAL, LNAW, LB1, LB2 Tx Antennas: BAND1, BAND2 You will see the two tx antenna options for each channel and the 3 rx options for each channel. The loopbacks are just internal to the LMS7. Mostly for debug, but they are there too as a useful options.

I guess that the channel selection is the essential question we are trying to answer. I’m a little slow here. 🙂

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