# ETTUS UB210 - sampling rate queries

**URL:** <https://www.ruby-forum.com/t/ettus-ub210-sampling-rate-queries/241266>\
**Category:** GNU Radio\
**Created:** [May 21, 2014, 10:52am UTC](https://www.ruby-forum.com/t/ettus-ub210-sampling-rate-queries/241266 "2014-05-21T10:52:40Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![musicdenotation](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/ea666f/32.png) [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\
**Post date:** [May 21, 2014, 10:52am UTC](https://www.ruby-forum.com/t/ettus-ub210-sampling-rate-queries/241266/1 "2014-05-21T10:52:40Z")

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Hi all,

We’ve been playing with UN210 in half-duplex mode so far but in the  
current project we’d like to use the latest UB210 due to its high  
bandwidth.  
I was wondering about 3 preliminary queries:

1. ETTUS Data Sheet - UB210  
The mentioned 56MHz in SISO mode (1x1) must be shared in FDD (56MHz for  
TX and RX, 28-28) or not (56MHz for TX and 56MHz for RX)?

2. Sampling Rate - full-duplex mode/2 protocols  
Is it possible to choose two different sampling rate, one for TX and one  
for RX? This can be useful when you are implementing two different  
communication protocols with different bandwidth?

3. Sampling Rate - full-duplex/1 protocol  
Would it be possible to change the sampling rate adaptively during a  
transmission (for example to switch from a LTE 1.4MHz to LTE 3MHz)?

Any suggestion is welcome,

Thank you in advance.

Andrea