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

[Martin Braun]

Gabriel,

I didn't realize you were also tx'ing. You won't be able to go to an
interpolation of 1024 on the Tx side.

M

On 04/16/2016 09:37 AM, Gabriel Pechiarovich wrote:
> Hi I just tried your suggestion and it was ok for the RX side, but in
> the Tx side the decimation wont go up to 1024, it only decimates up to 512, 
> 
> -- Asking for clock rate 16.384 MHz
> -- Actually got clock rate 16.384 MHz
> -- Performing timer loopback test... pass
> -- Performing timer loopback test... pass
> 
> UHD Warning:
> The hardware does not support the requested TX sample rate:
> Target sample rate: 0.016000 MSps
> Actual sample rate: 0.032000 MSps
> 
> so is this locked for security or something, or the hardware simple
> doesn't have the capabilities?
> 
> 
> 
> 2016-04-07 5:33 GMT+00:00 Martin Braun  >:
> 
> On 04/06/2016 10:26 PM, Martin Braun wrote:
> > 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.
> 
> ...they'll probably be about the same, as the same number of halfbands
> will be active. But the point is, you can't go below 10 MHz MCR on
> release 4, and not above decimation 1024.
> 
> Cheers,
> M
> >
> > 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  
> >> >>:
> >>
> >> 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
> >> >
> >> >
> >> >
> >> > ___
> >> > Discuss-gnuradio mailing list
> >> > Discuss-gnuradio@gnu.org 
> >
> >> > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
> >> >
> >>
> >>
> >> ___
> >> Discuss-gnuradio mailing list
> >> Discuss-gnuradio@gnu.org 
> >
> >> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
> >>
> >>
> >>
> >>
> >> --
> >> Gabriel Pechiarovich Salas
> >> Red Dragon Games
> >> Designers and game developers
> >
> 
> 
> ___
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> Discuss-gnuradio@gnu.org 
> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
> 
> 
> 
> 
> -- 
> Gabriel Pechiarovich Salas
> Red Dragon Games
> Designers and game developers


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

[Gabriel Pechiarovich]

Hi I just tried your suggestion and it was ok for the RX side, but in the
Tx side the decimation wont go up to 1024, it only decimates up to 512,

-- Asking for clock rate 16.384 MHz
-- Actually got clock rate 16.384 MHz
-- Performing timer loopback test... pass
-- Performing timer loopback test... pass

UHD Warning:
The hardware does not support the requested TX sample rate:
Target sample rate: 0.016000 MSps
Actual sample rate: 0.032000 MSps

so is this locked for security or something, or the hardware simple doesn't
have the capabilities?



2016-04-07 5:33 GMT+00:00 Martin Braun :

> On 04/06/2016 10:26 PM, Martin Braun wrote:
> > 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.
>
> ...they'll probably be about the same, as the same number of halfbands
> will be active. But the point is, you can't go below 10 MHz MCR on
> release 4, and not above decimation 1024.
>
> Cheers,
> M
> >
> > 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  >> >:
> >>
> >> 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
> >> >
> >> >
> >> >
> >> > ___
> >> > Discuss-gnuradio mailing list
> >> > Discuss-gnuradio@gnu.org 
> >> > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
> >> >
> >>
> >>
> >> ___
> >> Discuss-gnuradio mailing list
> >> Discuss-gnuradio@gnu.org 
> >> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
> >>
> >>
> >>
> >>
> >> --
> >> Gabriel Pechiarovich Salas
> >> Red Dragon Games
> >> Designers and game developers
> >
>
>
> ___
> Discuss-gnuradio mailing list
> Discuss-gnuradio@gnu.org
> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
>



-- 
Gabriel Pechiarovich Salas
Red Dragon Games
Designers and game developers
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Re: [Discuss-gnuradio] UHD clock rate in the usrp e310 - release 4

[Martin Braun]

On 04/06/2016 10:26 PM, Martin Braun wrote:
> 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.

...they'll probably be about the same, as the same number of halfbands
will be active. But the point is, you can't go below 10 MHz MCR on
release 4, and not above decimation 1024.

Cheers,
M
> 
> 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 > >:
>>
>> 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
>> >
>> >
>> >
>> > ___
>> > Discuss-gnuradio mailing list
>> > Discuss-gnuradio@gnu.org 
>> > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
>> >
>>
>>
>> ___
>> Discuss-gnuradio mailing list
>> Discuss-gnuradio@gnu.org 
>> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
>>
>>
>>
>>
>> -- 
>> Gabriel Pechiarovich Salas
>> Red Dragon Games
>> Designers and game developers
> 


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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  >:
> 
> 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
> >
> >
> >
> > ___
> > Discuss-gnuradio mailing list
> > Discuss-gnuradio@gnu.org 
> > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
> >
> 
> 
> ___
> Discuss-gnuradio mailing list
> Discuss-gnuradio@gnu.org 
> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
> 
> 
> 
> 
> -- 
> Gabriel Pechiarovich Salas
> Red Dragon Games
> Designers and game developers


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

[Gabriel Pechiarovich]

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 :

> 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
> >
> >
> >
> > ___
> > Discuss-gnuradio mailing list
> > Discuss-gnuradio@gnu.org
> > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
> >
>
>
> ___
> Discuss-gnuradio mailing list
> Discuss-gnuradio@gnu.org
> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
>



-- 
Gabriel Pechiarovich Salas
Red Dragon Games
Designers and game developers
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Re: [Discuss-gnuradio] UHD clock rate in the usrp e310 - release 4

[Martin Braun]

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
> 
> 
> 
> ___
> Discuss-gnuradio mailing list
> Discuss-gnuradio@gnu.org
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> 


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