Re: [Discuss-gnuradio] UHD clock rate in the usrp e310 - release 4

[Martin Braun]

On the release 4 image, you can't do that. But you can set the clock to
16 MHz and use a decimation of 1000. Or you can use a clock rate of
16384e3 and a decimation of 1024, for a better decimation filter response.

Cheers,
Martin

On 04/06/2016 06:11 PM, Gabriel Pechiarovich wrote:
> Hi, thanks for your answeri wasn't able to answer earlier.
> 
> I was aiming to a 8MHz clock rate in order to use the DDC and get a
> 16000 sample rate.
> So i think i was misunderstood.
> 
> Thank you very much 
> Gabriel
> 
> 
> 2016-03-31 13:25 GMT-05:00 Martin Braun <address@hidden
> <mailto:address@hidden>>:
> 
>     On the release 4 image, you can't set the clock speed under 10 MHz.
>     However, you can use a DDC (which is built in and automatically used).
>     Simply set the clock rate to 32 MHz (or 16 MHz if this is MIMO) and the
>     sample rate to 8 MHz.
> 
>     Cheers,
>     Martin
> 
>     On 03/30/2016 05:02 PM, Gabriel Pechiarovich wrote:
>     > Hi all,
>     > I've developed a flowgraph wich includes  a qpsk modulator and and
>     audio
>     > encoder, I used to run it in the E310 using the first release
>     > (http://files.ettus.com/e3xx_images/e3xx-release-001/) and now
>     trying to
>     > use the release 4.
>     >
>     > The problem is:
>     > in the UHD sink and source the clock rate was set to 8e6 Hz, and it
>     > worked fine, in the release 1, but in the relese 4 the Clock rate wont
>     > go lower than 10e6 Hz, so i cant archive the same results.
>     >
>     > Any idea how to force the use of 8MHz as the clock rate using the
>     release4
>     >
>     > Thank you very much
>     > Gabriel Pechiarovich Salas
>     >
>     >
>     >
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> -- 
> Gabriel Pechiarovich Salas
> Red Dragon Games
> Designers and game developers