# Multiple SDR Devices on the same computer

**URL:** <https://www.ruby-forum.com/t/multiple-sdr-devices-on-the-same-computer/234104>\
**Category:** GNU Radio\
**Created:** [February 6, 2015, 4:30am UTC](https://www.ruby-forum.com/t/multiple-sdr-devices-on-the-same-computer/234104 "2015-02-06T04:30:22Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![addis\_a](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/c4cdca/32.png) [@addis\_a](https://www.ruby-forum.com/u/addis_a)\
**Post date:** [February 6, 2015, 4:30am UTC](https://www.ruby-forum.com/t/multiple-sdr-devices-on-the-same-computer/234104/1 "2015-02-06T04:30:22Z")

</div>

Dear all,

I’m using BladeRF hardware in my system. I want to use two devices on  
the  
same computer. The “_osmocom Source_” lets me choose several channels, I  
actually need to use 2 channels. However, I don’t know how to set the  
parameter “Device Arguments”. Could anyone help me with this?

Thank you so much,  
Van-Ly

Van-Ly Nguyen,  
Research Assistant,  
Signals and Systems Laboratory - SSL  
Faculty of Electronics and Telecommunications - FET  
University of Engineering and Technology - UET  
Vietnam National University, Hanoi - VNU

Tel: (+84) 97 881 9406

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**Author:** ![NguySSSn\_VSSn\_LS\_S](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/n/9fc29f/32.png) [@NguySSSn\_VSSn\_LS\_S](https://www.ruby-forum.com/u/NguySSSn_VSSn_LS_S)\
**Post date:** [February 6, 2015, 4:46am UTC](https://www.ruby-forum.com/t/multiple-sdr-devices-on-the-same-computer/234104/2 "2015-02-06T04:46:21Z")

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Use bladerf=0 in one instance of the osmocom Source and bladerf=1 in  
another.

Ron

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<div class="post-metadata">

**Author:** ![NguySSSn\_VSSn\_LS\_S](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/n/9fc29f/32.png) [@NguySSSn\_VSSn\_LS\_S](https://www.ruby-forum.com/u/NguySSSn_VSSn_LS_S)\
**Post date:** [February 6, 2015, 8:43am UTC](https://www.ruby-forum.com/t/multiple-sdr-devices-on-the-same-computer/234104/3 "2015-02-06T08:43:00Z")

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It works now.  
Thank you very much Ron.

Van-Ly

Van-Ly Nguyen,  
Research Assistant,  
Signals and Systems Laboratory - SSL  
Faculty of Electronics and Telecommunications - FET  
University of Engineering and Technology - UET  
Vietnam National University, Hanoi - VNU

Tel: (+84) 97 881 9406

---

<div class="post-metadata">

**Author:** ![NguySSSn\_VSSn\_LS\_S](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/n/9fc29f/32.png) [@NguySSSn\_VSSn\_LS\_S](https://www.ruby-forum.com/u/NguySSSn_VSSn_LS_S)\
**Post date:** [February 6, 2015, 9:32am UTC](https://www.ruby-forum.com/t/multiple-sdr-devices-on-the-same-computer/234104/4 "2015-02-06T09:32:42Z")

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Thank you so much Ron for your very useful reply 🙂

Best,  
Van-Ly

Van-Ly Nguyen,  
Research Assistant,  
Signals and Systems Laboratory - SSL  
Faculty of Electronics and Telecommunications - FET  
University of Engineering and Technology - UET  
Vietnam National University, Hanoi - VNU

Tel: (+84) 97 881 9406

---

<div class="post-metadata">

**Author:** ![NguySSSn\_VSSn\_LS\_S](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/n/9fc29f/32.png) [@NguySSSn\_VSSn\_LS\_S](https://www.ruby-forum.com/u/NguySSSn_VSSn_LS_S)\
**Post date:** [February 6, 2015, 9:25am UTC](https://www.ruby-forum.com/t/multiple-sdr-devices-on-the-same-computer/234104/5 "2015-02-06T09:25:28Z")

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I’ve attached a text file with all the bladeRF arguments. A very useful  
option for higher sample rates (above 5 Msps or so) is to increase the  
USB buffering. I almost always use this argument list for my  
applications.

bladerf=0,buffers=128,buflen=32768

Ron