# Switching between RX1 and RX2 with the LimeSuite

**URL:** <https://discourse.myriadrf.org/t/switching-between-rx1-and-rx2-with-the-limesuite/4827>\
**Category:** General Discussion\
**Created:** [11 June 2019 14:05 UTC](https://discourse.myriadrf.org/t/switching-between-rx1-and-rx2-with-the-limesuite/4827 "2019-06-11T14:05:46Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Krombopulus](https://avatars.discourse-cdn.com/v4/letter/k/a6a055/32.png) [@Krombopulus](https://discourse.myriadrf.org/u/Krombopulus)\
**Post date:** [11 June 2019 14:05 UTC](https://discourse.myriadrf.org/t/switching-between-rx1-and-rx2-with-the-limesuite/4827/1 "2019-06-11T14:05:46Z")

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I have a rather simple question, quite similar to the following topic:

> [@Selecting RF port on LimeSDR](https://discourse.myriadrf.org/t/selecting-rf-port-on-limesdr/868):
>
> I’m currently trying to run gr-ieee80211 with my LimeSDR. All the software seems to be working, but I’m seeing no signal (ie the constellation diagram has all points at [0,0]). It looks like the USB Quick Test receive test is working at 800 MHz on port RX1\_L using the example.ini file they provide. With the USRP, there’s an option in gnuradio-companion to set the RF input/output port used, but I haven’t been able to find anything like that for LimeSDR. Does it automatically choose the input port…

except I want to change the RX ports with the LimeSuite and not with any other 3rd party software or python application.

After hooking up a LimeSDR-USB on my computer and loading in the example.ini, I was trying to switch between the RX1 and RX2 ports with the GUI controls. Switching between LNAL, LNAH and LNAW is possible with no problems but how can I switch to the corresponding ports of RX2?

I tried to change the RX channel in [Modules] → [FFT viewer] via the drop down menu from Channel A to Channel B without any usefull results: the FFT plot does not even move or update as it does on RX1.  
I assume Channel A and B refer to RX1 and RX2? Even after manually adjusting every parameter of the A Channel to B Channel there is no change in the FFT viewer.

Best regards,  
Krombopulus

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**Author:** ![Dynamix\_yang](https://yyz2.discourse-cdn.com/flex034/user_avatar/discourse.myriadrf.org/dynamix_yang/32/2891_2.png) [@Dynamix\_yang](https://discourse.myriadrf.org/u/Dynamix_yang)\
**Post date:** [12 June 2019 08:28 UTC](https://discourse.myriadrf.org/t/switching-between-rx1-and-rx2-with-the-limesuite/4827/2 "2019-06-12T08:28:54Z")

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Hi Krombopulus,  
Try to select MIMO and select channel B on the top of the LimeSuite. Then you can change RF route in RFE/TRF page.

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**Author:** ![Krombopulus](https://avatars.discourse-cdn.com/v4/letter/k/a6a055/32.png) [@Krombopulus](https://discourse.myriadrf.org/u/Krombopulus)\
**Post date:** [2 July 2019 16:10 UTC](https://discourse.myriadrf.org/t/switching-between-rx1-and-rx2-with-the-limesuite/4827/3 "2019-07-02T16:10:26Z")

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Hey Dynamix\_yang, thank you for your reply and sorry for my delayed response! Unfortunately I was not able to switch to RX2 with your suggestions. After enabling channel B and MIMO I tried everything in the RFE tab to get a correct FFT spectrum out of RX2 with no luck. Isn’t there a simple way to switch between RX1 and RX2 ports or am I missing something way too obvious here?

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**Author:** ![Zack](https://yyz2.discourse-cdn.com/flex034/user_avatar/discourse.myriadrf.org/zack/32/89_2.png) [@Zack](https://discourse.myriadrf.org/u/Zack)\
**Post date:** [3 July 2019 06:46 UTC](https://discourse.myriadrf.org/t/switching-between-rx1-and-rx2-with-the-limesuite/4827/4 "2019-07-03T06:46:24Z")

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Hi @Krombopulus,

First of all, there are 6 Rx RF inputs on LimeSDR-USB board.  
These belongs to MIMO channel A: RX1\_H, RX1\_W, RX1\_L.  
These belongs to MIMO channel B: RX2\_H, RX2\_W, RX2\_L.

To switch between channels, perform these steps:

1. Connect to the LimeSDR-USB board in LimeSuiteGUI;
2. Push “Default” button as shown by 4th red box in the picture bellow;
3. Check “Enable MIMO” check box as shown by 2nd red box in the picture bellow;
4. Select “A CHANNEL” radio button as shown by 2nd red box in the picture bellow if you want to switch between Rx RF inputs of MIMO channel A (RX1\_X ports will be affected); select “B CHANNEL” radio button as shown by 3rd red box in the picture bellow if you want to switch between Rx RF inputs of MIMO channel B (RX2\_X ports will be affected).  
4.1 To activate RXN\_H (where N is 1 or 2, depending on selction in step 4): “LNAH” as shown by 3rd red box in the picture bellow; Check “input of LNAL” check box and “input of LNAW” check box as shown by 1st red box in the picture bellow;  
4.2 To activate RXN\_L (where N is 1 or 2, depending on selction in step 4): “LNAL” as shown by 3rd red box in the picture bellow; Un-Check “input of LNAL” check box; Check “input of LNAW” check box as shown by 1st red box in the picture bellow;  
4.3 To activate RXN\_W (where N is 1 or 2, depending on selction in step 4): “LNAW” as shown by 3rd red box in the picture bellow; Check “input of LNAL” check box; Un-Check “input of LNAW” check box as shown by 1st red box in the picture bellow.

 ![image](https://canada1.discourse-cdn.com/flex034/uploads/myriadrf/original/2X/7/7198c61077667cd648c2b83a81c3a2e03ca18890.png)

In FFTVIewer:

Select “Display channel” as shown in red box in picture bellow you want to see. “A” will be for RX1\_x, B will be for RX2\_x. Then push “START” button. Then you will see signal from RF input, selected in procedure above.

 ![image](https://canada1.discourse-cdn.com/flex034/uploads/myriadrf/original/2X/6/6be13d6ec55a1e024f0be25a86bcc9e195a67d49.png)

Let us assume, you want to see RX1\_W channel in FFTViewer. Select “A CHANNEL” in step 4 in procedure above, then perform step 4.3. In FFTViewer select “A” in "Display channel and press “START” button. That’s it, you wil see RX1\_W channel data in FFTViewer.

Let us assume, you want to see RX2\_H channel in FFTViewer. Select “B CHANNEL” in step 4 in procedure above, then perform step 4.1. In FFTViewer select “B” in "Display channel and press “START” button. That’s it, you wil see RX2\_H channel data in FFTViewer.