# Filterbank

**URL:** <https://www.ruby-forum.com/t/filterbank/242916>\
**Category:** GNU Radio\
**Created:** [August 7, 2015, 7:10am UTC](https://www.ruby-forum.com/t/filterbank/242916 "2015-08-07T07:10:54Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Sadaf\_N](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/858c86/32.png) [@Sadaf\_N](https://www.ruby-forum.com/u/Sadaf_N)\
**Post date:** [August 7, 2015, 7:10am UTC](https://www.ruby-forum.com/t/filterbank/242916/1 "2015-08-07T07:10:54Z")

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How to switch receiving Filterbank from Gnuradio in USRP B200. I plan to  
add this Filterbank and switch it using onboard pin connector.

Jakub

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**Author:** ![Jakub\_Jebbjeb](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/e99b99/32.png) [@Jakub\_Jebbjeb](https://www.ruby-forum.com/u/Jakub_Jebbjeb)\
**Post date:** [August 7, 2015, 4:31pm UTC](https://www.ruby-forum.com/t/filterbank/242916/2 "2015-08-07T16:31:44Z")

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This is a filterbank (analog) of your own design?

You’ll want to use the GPIO interface:

> **[USRP Hardware Driver and Device Manual: GPIO API](https://files.ettus.com/manual/page_gpio_api.html)**

The B2xx GPIO API is the same as X3xx, and the example code:

gpio.cpp in the source tree

Can be modified to use the B2xx GPIO facilities.

Now, I’m not certain how one accesses that from Gnu Radio, since not all  
of the UHD API is fully exposed in gr-uhd. Perhaps Martin has a comment  
on this.

On 2015-08-07 01:09, Jakub Jebbjeb wrote:

> How to switch receiving Filterbank from Gnuradio in USRP B200. I plan to add  
> this Filterbank and switch it using onboard pin connector.
> 
> Jakub
> 
> * * *
> 
> Discuss-gnuradio mailing list  
> [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)  
> [Discuss-gnuradio Info Page](https://lists.gnu.org/mailman/listinfo/discuss-gnuradio) [1]

Links: