N210 stuck at max of 25MS/s

Hi there people,
I’m helping some friends here at work, they are doing an experiment with
the N210 and grabbing the data as 16bit complex samples.
The maximum symbol rate they are achieving is 25MS/s.
Is this correct? At 33.3 and 50 the uhd_fft just locks up, showing no
data
at all. We thought till 50MS/s was a supported rate.

Software are very recent git gnuradio and uhd.
The Gigabit is a “e1000e” driven card.
Btw, what linux distro do you recommend?

Best regards,
Rafael D.

On 03/01/2012 09:23 AM, Rafael D. wrote:

Hi there people,
I’m helping some friends here at work, they are doing an experiment with
the N210 and grabbing the data as 16bit complex samples.
The maximum symbol rate they are achieving is 25MS/s.
Is this correct? At 33.3 and 50 the uhd_fft just locks up, showing no data
at all. We thought till 50MS/s was a supported rate.

Set the “over-the-wire” type to sc8 mode for rates over 25Msps.
Otherwise, you have ethernet bus contention.

Stream args is one of the constructor parameters for the source and sink
blocks.
http://files.ettus.com/uhd_docs/doxygen/html/structuhd_1_1stream__args__t.html#a0ba0e946d2f83f7ac085f4f4e2ce9578

-Josh

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