Empathy List Archives

NF

Nick Foster

Thu, Jul 12, 2012 5:41 PM

It is FOX924B.

Best,
Nick

On Thu, Jul 12, 2012 at 9:17 AM, Christophe ALEXANDRE <
christophe.alexandre@cnam.fr> wrote:

Hi Josh,

could you tell us the model number of the VCTCXOs ?
i see U27 and U8 on the N2xx schematics, but no model number.

Regards.

Christophe ALEXANDRE
Conservatoire National des Arts et Métiers (CNAM)
Laboratoire CEDRIC-LAETITIA
Département EASY
Accès 11B niveau -1, Case 2D2P10
292 rue Saint Martin
75141 PARIS CEDEX 03
FRANCE
email : christophe.alexandre@cnam.fr
tel. 0140272699
mob. 0651087311
fax. 0140272994

----- Original Message ----- From: "Josh Blum" josh@ettus.com
To: usrp-users@lists.ettus.com
Sent: Thursday, July 12, 2012 10:39 AM
Subject: Re: [USRP-users] unstable LO of USRP-N200 and WBX

On 05/24/2012 04:59 PM, Francois Quitin wrote:

Hi all,

I'm currently using a USRP N200 with a WBX daughterboard. We are using a
gnuradio design (with some custom blocks) to synchronize the LOs of
several
USRPs to the LO of a master USRP using over-the air-signals.

While the setup was working perfectly with our old USRP-2, I have some
problems for it to work with the USRP-N200. The LOs of the latter seems
to
sometimes randomly "jump" by several tens of Hz.

You may be seeing the result of the onboard TCXO performing adjustments.
Unfortunately, the adjustments are digital and not analog, so it can be
seen a small jump.

You might try set_clock_source("external"). I believe that you can
either apply an external 10 MHz reference, or allow the clock
synthesizer to free-run.

Nick can confirm this tomorrow.

-josh

____________**
USRP-users mailing list
USRP-users@lists.ettus.com
http://lists.ettus.com/**mailman/listinfo/usrp-users**lists.ettus.comhttp://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com

It is FOX924B. Best, Nick On Thu, Jul 12, 2012 at 9:17 AM, Christophe ALEXANDRE < christophe.alexandre@cnam.fr> wrote: > Hi Josh, > > could you tell us the model number of the VCTCXOs ? > i see U27 and U8 on the N2xx schematics, but no model number. > > Regards. > > > Christophe ALEXANDRE > Conservatoire National des Arts et Métiers (CNAM) > Laboratoire CEDRIC-LAETITIA > Département EASY > Accès 11B niveau -1, Case 2D2P10 > 292 rue Saint Martin > 75141 PARIS CEDEX 03 > FRANCE > email : christophe.alexandre@cnam.fr > tel. 0140272699 > mob. 0651087311 > fax. 0140272994 > > > ----- Original Message ----- From: "Josh Blum" <josh@ettus.com> > To: <usrp-users@lists.ettus.com> > Sent: Thursday, July 12, 2012 10:39 AM > Subject: Re: [USRP-users] unstable LO of USRP-N200 and WBX > > > > >> >> On 05/24/2012 04:59 PM, Francois Quitin wrote: >> >>> Hi all, >>> >>> >>> >>> I'm currently using a USRP N200 with a WBX daughterboard. We are using a >>> gnuradio design (with some custom blocks) to synchronize the LOs of >>> several >>> USRPs to the LO of a master USRP using over-the air-signals. >>> >>> >>> >>> While the setup was working perfectly with our old USRP-2, I have some >>> problems for it to work with the USRP-N200. The LOs of the latter seems >>> to >>> sometimes randomly "jump" by several tens of Hz. >>> >>> >>> >> You may be seeing the result of the onboard TCXO performing adjustments. >> Unfortunately, the adjustments are digital and not analog, so it can be >> seen a small jump. >> >> You might try set_clock_source("external"). I believe that you can >> either apply an external 10 MHz reference, or allow the clock >> synthesizer to free-run. >> >> Nick can confirm this tomorrow. >> >> -josh >> >> ______________________________**_________________ >> USRP-users mailing list >> USRP-users@lists.ettus.com >> http://lists.ettus.com/**mailman/listinfo/usrp-users_**lists.ettus.com<http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com> >> > > > > ______________________________**_________________ > USRP-users mailing list > USRP-users@lists.ettus.com > http://lists.ettus.com/**mailman/listinfo/usrp-users_**lists.ettus.com<http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com> >

CA

Christophe ALEXANDRE

Fri, Jul 13, 2012 7:09 AM

we have the same problem as Francois Quitin.
the unstable LO give us some headaches with
our CFO algorithms.

would it be possible to change this vctcxo
and use another model ? we own 5 N210.

Salutations.

Christophe ALEXANDRE
Conservatoire National des Arts et Métiers (CNAM)
Laboratoire CEDRIC-LAETITIA
Département EASY
Accès 11B niveau -1, Case 2D2P10
292 rue Saint Martin
75141 PARIS CEDEX 03
FRANCE
email : christophe.alexandre@cnam.fr
tel. 0140272699
mob. 0651087311
fax. 0140272994

----- Original Message -----
From: Nick Foster
To: Christophe ALEXANDRE
Cc: josh@ettus.com ; usrp-users@lists.ettus.com
Sent: Thursday, July 12, 2012 7:41 PM
Subject: Re: [USRP-users] unstable LO of USRP-N200 and WBX

It is FOX924B.

Best,
Nick

On Thu, Jul 12, 2012 at 9:17 AM, Christophe ALEXANDRE christophe.alexandre@cnam.fr wrote:

Hi Josh,

could you tell us the model number of the VCTCXOs ?
i see U27 and U8 on the N2xx schematics, but no model number.

Regards.


Christophe ALEXANDRE
Conservatoire National des Arts et Métiers (CNAM)
Laboratoire CEDRIC-LAETITIA
Département EASY
Accès 11B niveau -1, Case 2D2P10
292 rue Saint Martin
75141 PARIS CEDEX 03
FRANCE
email : christophe.alexandre@cnam.fr
tel. 0140272699
mob. 0651087311
fax. 0140272994


----- Original Message ----- From: "Josh Blum" <josh@ettus.com>
To: <usrp-users@lists.ettus.com>
Sent: Thursday, July 12, 2012 10:39 AM
Subject: Re: [USRP-users] unstable LO of USRP-N200 and WBX






  On 05/24/2012 04:59 PM, Francois Quitin wrote:

    Hi all,



    I'm currently using a USRP N200 with a WBX daughterboard. We are using a
    gnuradio design (with some custom blocks) to synchronize the LOs of several
    USRPs to the LO of a master USRP using over-the air-signals.



    While the setup was working perfectly with our old USRP-2, I have some
    problems for it to work with the USRP-N200. The LOs of the latter seems to
    sometimes randomly "jump" by several tens of Hz.




  You may be seeing the result of the onboard TCXO performing adjustments.
  Unfortunately, the adjustments are digital and not analog, so it can be
  seen a small jump.

  You might try set_clock_source("external"). I believe that you can
  either apply an external 10 MHz reference, or allow the clock
  synthesizer to free-run.

  Nick can confirm this tomorrow.

  -josh

  _______________________________________________
  USRP-users mailing list
  USRP-users@lists.ettus.com
  http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com 




_______________________________________________
USRP-users mailing list
USRP-users@lists.ettus.com
http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com

we have the same problem as Francois Quitin. the unstable LO give us some headaches with our CFO algorithms. would it be possible to change this vctcxo and use another model ? we own 5 N210. Salutations. Christophe ALEXANDRE Conservatoire National des Arts et Métiers (CNAM) Laboratoire CEDRIC-LAETITIA Département EASY Accès 11B niveau -1, Case 2D2P10 292 rue Saint Martin 75141 PARIS CEDEX 03 FRANCE email : christophe.alexandre@cnam.fr tel. 0140272699 mob. 0651087311 fax. 0140272994 ----- Original Message ----- From: Nick Foster To: Christophe ALEXANDRE Cc: josh@ettus.com ; usrp-users@lists.ettus.com Sent: Thursday, July 12, 2012 7:41 PM Subject: Re: [USRP-users] unstable LO of USRP-N200 and WBX It is FOX924B. Best, Nick On Thu, Jul 12, 2012 at 9:17 AM, Christophe ALEXANDRE <christophe.alexandre@cnam.fr> wrote: Hi Josh, could you tell us the model number of the VCTCXOs ? i see U27 and U8 on the N2xx schematics, but no model number. Regards. Christophe ALEXANDRE Conservatoire National des Arts et Métiers (CNAM) Laboratoire CEDRIC-LAETITIA Département EASY Accès 11B niveau -1, Case 2D2P10 292 rue Saint Martin 75141 PARIS CEDEX 03 FRANCE email : christophe.alexandre@cnam.fr tel. 0140272699 mob. 0651087311 fax. 0140272994 ----- Original Message ----- From: "Josh Blum" <josh@ettus.com> To: <usrp-users@lists.ettus.com> Sent: Thursday, July 12, 2012 10:39 AM Subject: Re: [USRP-users] unstable LO of USRP-N200 and WBX On 05/24/2012 04:59 PM, Francois Quitin wrote: Hi all, I'm currently using a USRP N200 with a WBX daughterboard. We are using a gnuradio design (with some custom blocks) to synchronize the LOs of several USRPs to the LO of a master USRP using over-the air-signals. While the setup was working perfectly with our old USRP-2, I have some problems for it to work with the USRP-N200. The LOs of the latter seems to sometimes randomly "jump" by several tens of Hz. You may be seeing the result of the onboard TCXO performing adjustments. Unfortunately, the adjustments are digital and not analog, so it can be seen a small jump. You might try set_clock_source("external"). I believe that you can either apply an external 10 MHz reference, or allow the clock synthesizer to free-run. Nick can confirm this tomorrow. -josh _______________________________________________ USRP-users mailing list USRP-users@lists.ettus.com http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com _______________________________________________ USRP-users mailing list USRP-users@lists.ettus.com http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com

NF

Nick Foster

Fri, Jul 13, 2012 3:03 PM

There are three options:

Use an external 10MHz reference, such as a GPSDO or reference oscillator.
Change the TCXO to another device.
Set the N210 to use external reference, but do not connect an external
reference. This will let the N210 operate without a 10MHz reference. The
absolute frequency accuracy will be less, but the discontinuities will be
gone.

Let me know if these solutions are acceptable.
--n

On Fri, Jul 13, 2012 at 12:09 AM, Christophe ALEXANDRE <
christophe.alexandre@cnam.fr> wrote:

**
we have the same problem as Francois Quitin.
the unstable LO give us some headaches with
our CFO algorithms.

would it be possible to change this vctcxo
and use another model ? we own 5 N210.

Salutations.

Christophe ALEXANDRE
Conservatoire National des Arts et Métiers (CNAM)
Laboratoire CEDRIC-LAETITIA
Département EASY
Accès 11B niveau -1, Case 2D2P10
292 rue Saint Martin
75141 PARIS CEDEX 03
FRANCE
email : christophe.alexandre@cnam.fr
tel. 0140272699
mob. 0651087311
fax. 0140272994

----- Original Message -----
From: Nick Foster nick@ettus.com
To: Christophe ALEXANDRE christophe.alexandre@cnam.fr
Cc: josh@ettus.com ; usrp-users@lists.ettus.com
Sent: Thursday, July 12, 2012 7:41 PM
Subject: Re: [USRP-users] unstable LO of USRP-N200 and WBX

It is FOX924B.

Best,
Nick

On Thu, Jul 12, 2012 at 9:17 AM, Christophe ALEXANDRE <
christophe.alexandre@cnam.fr> wrote:

Hi Josh,

could you tell us the model number of the VCTCXOs ?
i see U27 and U8 on the N2xx schematics, but no model number.

Regards.

Christophe ALEXANDRE
Conservatoire National des Arts et Métiers (CNAM)
Laboratoire CEDRIC-LAETITIA
Département EASY
Accès 11B niveau -1, Case 2D2P10
292 rue Saint Martin
75141 PARIS CEDEX 03
FRANCE
email : christophe.alexandre@cnam.fr
tel. 0140272699
mob. 0651087311
fax. 0140272994

----- Original Message ----- From: "Josh Blum" josh@ettus.com
To: usrp-users@lists.ettus.com
Sent: Thursday, July 12, 2012 10:39 AM
Subject: Re: [USRP-users] unstable LO of USRP-N200 and WBX

On 05/24/2012 04:59 PM, Francois Quitin wrote:

Hi all,

I'm currently using a USRP N200 with a WBX daughterboard. We are using a
gnuradio design (with some custom blocks) to synchronize the LOs of
several
USRPs to the LO of a master USRP using over-the air-signals.

While the setup was working perfectly with our old USRP-2, I have some
problems for it to work with the USRP-N200. The LOs of the latter seems
to
sometimes randomly "jump" by several tens of Hz.

You may be seeing the result of the onboard TCXO performing adjustments.
Unfortunately, the adjustments are digital and not analog, so it can be
seen a small jump.

You might try set_clock_source("external"). I believe that you can
either apply an external 10 MHz reference, or allow the clock
synthesizer to free-run.

Nick can confirm this tomorrow.

-josh

____________**
USRP-users mailing list
USRP-users@lists.ettus.com
http://lists.ettus.com/**mailman/listinfo/usrp-users**lists.ettus.comhttp://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com

There are three options: 1. Use an external 10MHz reference, such as a GPSDO or reference oscillator. 2. Change the TCXO to another device. 3. Set the N210 to use external reference, but do not connect an external reference. This will let the N210 operate without a 10MHz reference. The absolute frequency accuracy will be less, but the discontinuities will be gone. Let me know if these solutions are acceptable. --n On Fri, Jul 13, 2012 at 12:09 AM, Christophe ALEXANDRE < christophe.alexandre@cnam.fr> wrote: > ** > we have the same problem as Francois Quitin. > the unstable LO give us some headaches with > our CFO algorithms. > > would it be possible to change this vctcxo > and use another model ? we own 5 N210. > > Salutations. > > > Christophe ALEXANDRE > Conservatoire National des Arts et Métiers (CNAM) > Laboratoire CEDRIC-LAETITIA > Département EASY > Accès 11B niveau -1, Case 2D2P10 > 292 rue Saint Martin > 75141 PARIS CEDEX 03 > FRANCE > email : christophe.alexandre@cnam.fr > tel. 0140272699 > mob. 0651087311 > fax. 0140272994 > > > ----- Original Message ----- > *From:* Nick Foster <nick@ettus.com> > *To:* Christophe ALEXANDRE <christophe.alexandre@cnam.fr> > *Cc:* josh@ettus.com ; usrp-users@lists.ettus.com > *Sent:* Thursday, July 12, 2012 7:41 PM > *Subject:* Re: [USRP-users] unstable LO of USRP-N200 and WBX > > It is FOX924B. > > Best, > Nick > > On Thu, Jul 12, 2012 at 9:17 AM, Christophe ALEXANDRE < > christophe.alexandre@cnam.fr> wrote: > >> Hi Josh, >> >> could you tell us the model number of the VCTCXOs ? >> i see U27 and U8 on the N2xx schematics, but no model number. >> >> Regards. >> >> >> Christophe ALEXANDRE >> Conservatoire National des Arts et Métiers (CNAM) >> Laboratoire CEDRIC-LAETITIA >> Département EASY >> Accès 11B niveau -1, Case 2D2P10 >> 292 rue Saint Martin >> 75141 PARIS CEDEX 03 >> FRANCE >> email : christophe.alexandre@cnam.fr >> tel. 0140272699 >> mob. 0651087311 >> fax. 0140272994 >> >> >> ----- Original Message ----- From: "Josh Blum" <josh@ettus.com> >> To: <usrp-users@lists.ettus.com> >> Sent: Thursday, July 12, 2012 10:39 AM >> Subject: Re: [USRP-users] unstable LO of USRP-N200 and WBX >> >> >> >> >>> >>> On 05/24/2012 04:59 PM, Francois Quitin wrote: >>> >>>> Hi all, >>>> >>>> >>>> >>>> I'm currently using a USRP N200 with a WBX daughterboard. We are using a >>>> gnuradio design (with some custom blocks) to synchronize the LOs of >>>> several >>>> USRPs to the LO of a master USRP using over-the air-signals. >>>> >>>> >>>> >>>> While the setup was working perfectly with our old USRP-2, I have some >>>> problems for it to work with the USRP-N200. The LOs of the latter seems >>>> to >>>> sometimes randomly "jump" by several tens of Hz. >>>> >>>> >>>> >>> You may be seeing the result of the onboard TCXO performing adjustments. >>> Unfortunately, the adjustments are digital and not analog, so it can be >>> seen a small jump. >>> >>> You might try set_clock_source("external"). I believe that you can >>> either apply an external 10 MHz reference, or allow the clock >>> synthesizer to free-run. >>> >>> Nick can confirm this tomorrow. >>> >>> -josh >>> >>> ______________________________**_________________ >>> USRP-users mailing list >>> USRP-users@lists.ettus.com >>> http://lists.ettus.com/**mailman/listinfo/usrp-users_**lists.ettus.com<http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com> >>> >> >> >> >> ______________________________**_________________ >> USRP-users mailing list >> USRP-users@lists.ettus.com >> http://lists.ettus.com/**mailman/listinfo/usrp-users_**lists.ettus.com<http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com> >> > >

FQ

Francois Quitin

Fri, Jul 13, 2012 9:33 PM

Hi Christophe,

Just saw youre having the same problem as I had earlier. I was able to
solve my problem by setting my clock source to external. The LO frequency
offset becomes an order of magnitude higher (around 10 kHz), but there are
no more random jumps in the LO clock offset, since the digital correction of
the clock is deactivated.

Hope this helps,

François

De : usrp-users-bounces@lists.ettus.com
[mailto:usrp-users-bounces@lists.ettus.com] De la part de Christophe
ALEXANDRE
Envoyé : vendredi 13 juillet 2012 00:09
À : Nick Foster
Cc : usrp-users@lists.ettus.com
Objet : Re: [USRP-users] unstable LO of USRP-N200 and WBX

we have the same problem as Francois Quitin.

the unstable LO give us some headaches with

our CFO algorithms.

would it be possible to change this vctcxo

and use another model ? we own 5 N210.

Salutations.

Christophe ALEXANDRE
Conservatoire National des Arts et Métiers (CNAM)
Laboratoire CEDRIC-LAETITIA
Département EASY
Accès 11B niveau -1, Case 2D2P10
292 rue Saint Martin
75141 PARIS CEDEX 03
FRANCE
email : christophe.alexandre@cnam.fr
tel. 0140272699
mob. 0651087311
fax. 0140272994

----- Original Message -----

From: Nick Foster mailto:nick@ettus.com

To: Christophe mailto:christophe.alexandre@cnam.fr ALEXANDRE

Cc: josh@ettus.com ; usrp-users@lists.ettus.com

Sent: Thursday, July 12, 2012 7:41 PM

Subject: Re: [USRP-users] unstable LO of USRP-N200 and WBX

It is FOX924B.

Best,

Nick

On Thu, Jul 12, 2012 at 9:17 AM, Christophe ALEXANDRE
christophe.alexandre@cnam.fr wrote:

Hi Josh,

could you tell us the model number of the VCTCXOs ?
i see U27 and U8 on the N2xx schematics, but no model number.

Regards.

Christophe ALEXANDRE
Conservatoire National des Arts et Métiers (CNAM)
Laboratoire CEDRIC-LAETITIA
Département EASY
Accès 11B niveau -1, Case 2D2P10
292 rue Saint Martin
75141 PARIS CEDEX 03
FRANCE
email : christophe.alexandre@cnam.fr
tel. 0140272699
mob. 0651087311
fax. 0140272994

----- Original Message ----- From: "Josh Blum" josh@ettus.com
To: usrp-users@lists.ettus.com
Sent: Thursday, July 12, 2012 10:39 AM
Subject: Re: [USRP-users] unstable LO of USRP-N200 and WBX

On 05/24/2012 04:59 PM, Francois Quitin wrote:

Hi all,

I'm currently using a USRP N200 with a WBX daughterboard. We are using a
gnuradio design (with some custom blocks) to synchronize the LOs of several
USRPs to the LO of a master USRP using over-the air-signals.

While the setup was working perfectly with our old USRP-2, I have some
problems for it to work with the USRP-N200. The LOs of the latter seems to
sometimes randomly "jump" by several tens of Hz.

You may be seeing the result of the onboard TCXO performing adjustments.
Unfortunately, the adjustments are digital and not analog, so it can be
seen a small jump.

You might try set_clock_source("external"). I believe that you can
either apply an external 10 MHz reference, or allow the clock
synthesizer to free-run.

Nick can confirm this tomorrow.

-josh

USRP-users mailing list
USRP-users@lists.ettus.com
http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com

Hi Christophe, Just saw youre having the same problem as I had earlier. I was able to solve my problem by setting my clock source to external. The LO frequency offset becomes an order of magnitude higher (around 10 kHz), but there are no more random jumps in the LO clock offset, since the digital correction of the clock is deactivated. Hope this helps, François De : usrp-users-bounces@lists.ettus.com [mailto:usrp-users-bounces@lists.ettus.com] De la part de Christophe ALEXANDRE Envoyé : vendredi 13 juillet 2012 00:09 À : Nick Foster Cc : usrp-users@lists.ettus.com Objet : Re: [USRP-users] unstable LO of USRP-N200 and WBX we have the same problem as Francois Quitin. the unstable LO give us some headaches with our CFO algorithms. would it be possible to change this vctcxo and use another model ? we own 5 N210. Salutations. Christophe ALEXANDRE Conservatoire National des Arts et Métiers (CNAM) Laboratoire CEDRIC-LAETITIA Département EASY Accès 11B niveau -1, Case 2D2P10 292 rue Saint Martin 75141 PARIS CEDEX 03 FRANCE email : christophe.alexandre@cnam.fr tel. 0140272699 mob. 0651087311 fax. 0140272994 ----- Original Message ----- From: Nick Foster <mailto:nick@ettus.com> To: Christophe <mailto:christophe.alexandre@cnam.fr> ALEXANDRE Cc: josh@ettus.com ; usrp-users@lists.ettus.com Sent: Thursday, July 12, 2012 7:41 PM Subject: Re: [USRP-users] unstable LO of USRP-N200 and WBX It is FOX924B. Best, Nick On Thu, Jul 12, 2012 at 9:17 AM, Christophe ALEXANDRE <christophe.alexandre@cnam.fr> wrote: Hi Josh, could you tell us the model number of the VCTCXOs ? i see U27 and U8 on the N2xx schematics, but no model number. Regards. Christophe ALEXANDRE Conservatoire National des Arts et Métiers (CNAM) Laboratoire CEDRIC-LAETITIA Département EASY Accès 11B niveau -1, Case 2D2P10 292 rue Saint Martin 75141 PARIS CEDEX 03 FRANCE email : christophe.alexandre@cnam.fr tel. 0140272699 mob. 0651087311 fax. 0140272994 ----- Original Message ----- From: "Josh Blum" <josh@ettus.com> To: <usrp-users@lists.ettus.com> Sent: Thursday, July 12, 2012 10:39 AM Subject: Re: [USRP-users] unstable LO of USRP-N200 and WBX On 05/24/2012 04:59 PM, Francois Quitin wrote: Hi all, I'm currently using a USRP N200 with a WBX daughterboard. We are using a gnuradio design (with some custom blocks) to synchronize the LOs of several USRPs to the LO of a master USRP using over-the air-signals. While the setup was working perfectly with our old USRP-2, I have some problems for it to work with the USRP-N200. The LOs of the latter seems to sometimes randomly "jump" by several tens of Hz. You may be seeing the result of the onboard TCXO performing adjustments. Unfortunately, the adjustments are digital and not analog, so it can be seen a small jump. You might try set_clock_source("external"). I believe that you can either apply an external 10 MHz reference, or allow the clock synthesizer to free-run. Nick can confirm this tomorrow. -josh _______________________________________________ USRP-users mailing list USRP-users@lists.ettus.com http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com _______________________________________________ USRP-users mailing list USRP-users@lists.ettus.com http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com