# Multichannel (simultaneous) RX using LimeSDR

**URL:** <https://discourse.myriadrf.org/t/multichannel-simultaneous-rx-using-limesdr/1887>\
**Category:** LimeSDR\
**Created:** [22 October 2017 00:04 UTC](https://discourse.myriadrf.org/t/multichannel-simultaneous-rx-using-limesdr/1887 "2017-10-22T00:04:25Z")\
**Posts on this page:** 1\
**Showing post:** 14

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**Author:** ![will\_mysky](https://avatars.discourse-cdn.com/v4/letter/w/c0e974/32.png) [@will\_mysky](https://discourse.myriadrf.org/u/will_mysky)\
**Post date:** [20 November 2017 23:14 UTC](https://discourse.myriadrf.org/t/multichannel-simultaneous-rx-using-limesdr/1887/14 "2017-11-20T23:14:50Z")

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Hi all,

I’m in the process of trying to RX from the “A” and B" receivers using GNURadio Companion and the associated stack of API. I have single channel RX working just fine. My osmocom source block uses the “soapy=0,driver=lime,nchan=2” as discussed in another thread ([https://discourse.myriadrf.org/t/two-rx-channels-in-gnu-radio/1234/5](https://discourse.myriadrf.org/t/two-rx-channels-in-gnu-radio/1234/5)) but I am getting the error

> RuntimeError: resolve\_port: hierarchical block ‘source\_impl’: output 1 is not connected internally

every time I attempt to run the code. I can’t see where I’m going wrong here. LimeUtils can locate and connect to the device without issue, and if I run single channel source (and remove the “nchan=2”) everything works fine.

Thanks everyone for your help  
Cheers  
Will

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