Empathy List Archives

SH

Simon HB9DRV

Sun, Jun 3, 2012 3:43 PM

Hi,

If I have a GPSDO in a N210 do I have to issue any extra commands to enable
it, or is it really plug-in, connect Trimble Thunderbolt, and just use it?

I'm asking because I would only buy this if I have to issue commands,
otherwise for now it's not necessary (but would be very nice to have).

Simon Brown, HB9DRV
http://dit-dit-dit.com

Not sent from an iPhone: I don't have one and I don't want one.

Hi, If I have a GPSDO in a N210 do I have to issue any extra commands to enable it, or is it really plug-in, connect Trimble Thunderbolt, and just use it? I'm asking because I would only buy this if I have to issue commands, otherwise for now it's not necessary (but would be very nice to have). Simon Brown, HB9DRV http://dit-dit-dit.com Not sent from an iPhone: I don't have one and I don't want one.

MD

Marcus D. Leech

Sun, Jun 3, 2012 4:11 PM

Hi,

If I have a GPSDO in a N210 do I have to issue any extra commands to
enable it, or is it really plug-in, connect Trimble Thunderbolt, and
just use it?

I'm asking because I would only buy this if I have to issue commands,
otherwise for now it's not necessary (but would be very nice to have).

Simon Brown, HB9DRV
http://dit-dit-dit.com

Not sent from an iPhone: I don't have one and I don't want one.

You have to tell the underlying hardware that you wish it to use the
external 10Mhz and 1PPS references.

--
Marcus Leech
Principal Investigator
Shirleys Bay Radio Astronomy Consortium
http://www.sbrac.org

> Hi, > > If I have a GPSDO in a N210 do I have to issue any extra commands to > enable it, or is it really plug-in, connect Trimble Thunderbolt, and > just use it? > > I'm asking because I would only buy this if I have to issue commands, > otherwise for now it's not necessary (but would be very nice to have). > > Simon Brown, HB9DRV > http://dit-dit-dit.com > > Not sent from an iPhone: I don't have one and I don't want one. > You have to tell the underlying hardware that you wish it to use the external 10Mhz and 1PPS references. -- Marcus Leech Principal Investigator Shirleys Bay Radio Astronomy Consortium http://www.sbrac.org

SH

Simon HB9DRV

Sun, Jun 3, 2012 4:16 PM

Hi,

Via UHD.dll or flipping switches? It looks like I'll be buying one anyway,
the phase noise spec is very good.

Searching the UHD.dl source code I see this which indicates that it's used
automagically:

"By default, if a GPSDO is detected at startup, the USRP will be configured
to use it as a frequency and time reference. The internal VITA timestamp
will be initialized to the GPS time, and the internal oscillator will be
phase-locked to the 10MHz GPSDO reference. If the GPSDO is not locked to
satellites, the VITA time will not be initialized."

Simon Brown, HB9DRV
http://dit-dit-dit.com/ http://dit-dit-dit.com

You are standing at the end of a road before a small brick building. Around
you is a forest.

A small stream flows out of the building and down a gully. The sunspot count
is -25.

From: usrp-users-bounces@lists.ettus.com
[mailto:usrp-users-bounces@lists.ettus.com] On Behalf Of Marcus D. Leech
Sent: 03 June 2012 18:11
To: usrp-users@lists.ettus.com
Subject: Re: [USRP-users] GPSDO Support

Hi,

If I have a GPSDO in a N210 do I have to issue any extra commands to enable
it, or is it really plug-in, connect Trimble Thunderbolt, and just use it?

I'm asking because I would only buy this if I have to issue commands,
otherwise for now it's not necessary (but would be very nice to have).

Simon Brown, HB9DRV
http://dit-dit-dit.com

Not sent from an iPhone: I don't have one and I don't want one.

You have to tell the underlying hardware that you wish it to use the
external 10Mhz and 1PPS references.

--
Marcus Leech
Principal Investigator
Shirleys Bay Radio Astronomy Consortium
http://www.sbrac.org

Hi, Via UHD.dll or flipping switches? It looks like I'll be buying one anyway, the phase noise spec is very good. Searching the UHD.dl source code I see this which indicates that it's used automagically: "By default, if a GPSDO is detected at startup, the USRP will be configured to use it as a frequency and time reference. The internal VITA timestamp will be initialized to the GPS time, and the internal oscillator will be phase-locked to the 10MHz GPSDO reference. If the GPSDO is not locked to satellites, the VITA time will not be initialized." Simon Brown, HB9DRV <http://dit-dit-dit.com/> http://dit-dit-dit.com You are standing at the end of a road before a small brick building. Around you is a forest. A small stream flows out of the building and down a gully. The sunspot count is -25. From: usrp-users-bounces@lists.ettus.com [mailto:usrp-users-bounces@lists.ettus.com] On Behalf Of Marcus D. Leech Sent: 03 June 2012 18:11 To: usrp-users@lists.ettus.com Subject: Re: [USRP-users] GPSDO Support Hi, If I have a GPSDO in a N210 do I have to issue any extra commands to enable it, or is it really plug-in, connect Trimble Thunderbolt, and just use it? I'm asking because I would only buy this if I have to issue commands, otherwise for now it's not necessary (but would be very nice to have). Simon Brown, HB9DRV http://dit-dit-dit.com Not sent from an iPhone: I don't have one and I don't want one. You have to tell the underlying hardware that you wish it to use the external 10Mhz and 1PPS references. -- Marcus Leech Principal Investigator Shirleys Bay Radio Astronomy Consortium http://www.sbrac.org

MD

Marcus D. Leech

Sun, Jun 3, 2012 4:36 PM

Hi,

Via UHD.dll or flipping switches? It looks like I'll be buying one
anyway, the phase noise spec is very good.

Searching the UHD.dl source code I see this which indicates that it's
used automagically:

"By default, if a GPSDO is detected at startup, the USRP will be
configured to use it as a frequency and time reference. The internal
VITA timestamp will be initialized to the GPS time, and the internal
oscillator will be phase-locked to the 10MHz GPSDO reference. If the
GPSDO is not locked to satellites, the VITA time will not be initialized."

That is only, as far as I know, for the "in skin" internal GPSDO.

--
Marcus Leech
Principal Investigator
Shirleys Bay Radio Astronomy Consortium
http://www.sbrac.org

> Hi, > > Via UHD.dll or flipping switches? It looks like I'll be buying one > anyway, the phase noise spec is very good. > > Searching the UHD.dl source code I see this which indicates that it's > used automagically: > > "By default, if a GPSDO is detected at startup, the USRP will be > configured to use it as a frequency and time reference. The internal > VITA timestamp will be initialized to the GPS time, and the internal > oscillator will be phase-locked to the 10MHz GPSDO reference. If the > GPSDO is not locked to satellites, the VITA time will not be initialized." > That is only, as far as I know, for the "in skin" internal GPSDO. -- Marcus Leech Principal Investigator Shirleys Bay Radio Astronomy Consortium http://www.sbrac.org

SH

Simon HB9DRV

Sun, Jun 3, 2012 9:39 PM

Hi Marcus,

Thanks - it's the internal GPSDO I'll be using. The oscillator phase noise
is very good.

Simon Brown, HB9DRV
http://dit-dit-dit.com/ http://dit-dit-dit.com

You are standing at the end of a road before a small brick building. Around
you is a forest.

A small stream flows out of the building and down a gully. The sunspot count
is 285.

From: Marcus D. Leech [mailto:mleech@ripnet.com]
Sent: 03 June 2012 18:37
To: Simon HB9DRV
Cc: usrp-users@lists.ettus.com
Subject: Re: [USRP-users] GPSDO Support

Hi,

Via UHD.dll or flipping switches? It looks like I'll be buying one anyway,
the phase noise spec is very good.

Searching the UHD.dl source code I see this which indicates that it's used
automagically:

"By default, if a GPSDO is detected at startup, the USRP will be configured
to use it as a frequency and time reference. The internal VITA timestamp
will be initialized to the GPS time, and the internal oscillator will be
phase-locked to the 10MHz GPSDO reference. If the GPSDO is not locked to
satellites, the VITA time will not be initialized."

That is only, as far as I know, for the "in skin" internal GPSDO.

--
Marcus Leech
Principal Investigator
Shirleys Bay Radio Astronomy Consortium
http://www.sbrac.org

Hi Marcus, Thanks - it's the internal GPSDO I'll be using. The oscillator phase noise is very good. Simon Brown, HB9DRV <http://dit-dit-dit.com/> http://dit-dit-dit.com You are standing at the end of a road before a small brick building. Around you is a forest. A small stream flows out of the building and down a gully. The sunspot count is 285. From: Marcus D. Leech [mailto:mleech@ripnet.com] Sent: 03 June 2012 18:37 To: Simon HB9DRV Cc: usrp-users@lists.ettus.com Subject: Re: [USRP-users] GPSDO Support Hi, Via UHD.dll or flipping switches? It looks like I'll be buying one anyway, the phase noise spec is very good. Searching the UHD.dl source code I see this which indicates that it's used automagically: "By default, if a GPSDO is detected at startup, the USRP will be configured to use it as a frequency and time reference. The internal VITA timestamp will be initialized to the GPS time, and the internal oscillator will be phase-locked to the 10MHz GPSDO reference. If the GPSDO is not locked to satellites, the VITA time will not be initialized." That is only, as far as I know, for the "in skin" internal GPSDO. -- Marcus Leech Principal Investigator Shirleys Bay Radio Astronomy Consortium http://www.sbrac.org

JM

John Malsbury

Mon, Jun 4, 2012 3:57 PM

Simon,

If you follow the instructions here, and burn the EEPROM, the USRP will
be configured to select the GPSDO 10 MHz and 1 PPS by default. As
indicated in the installation instructions provided with the GPSDO, you
will have to move a jumper that will connect the GPSDO 10 MHz, and
disconnect the external 10 MHz reference. You should not need to do
anything with the .hdl code.

Have I properly understood your questions?

-John

On 6/3/2012 2:39 PM, Simon HB9DRV wrote:

Hi Marcus,

Thanks -- it's the internal GPSDO I'll be using. The oscillator phase
noise is very good.

Simon Brown, HB9DRV
http://dit-dit-dit.com http://dit-dit-dit.com/

You are standing at the end of a road before a small brick building.
Around you is a forest.

A small stream flows out of the building and down a gully. The sunspot
count is 285.

*From:*Marcus D. Leech [mailto:mleech@ripnet.com]
Sent: 03 June 2012 18:37
To: Simon HB9DRV
Cc: usrp-users@lists.ettus.com
Subject: Re: [USRP-users] GPSDO Support

 Hi,

 Via UHD.dll or flipping switches? It looks like I'll be buying one
 anyway, the phase noise spec is very good.

 Searching the UHD.dl source code I see this which indicates that
 it's used automagically:

 "By default, if a GPSDO is detected at startup, the USRP will be
 configured to use it as a frequency and time reference. The
 internal VITA timestamp will be initialized to the GPS time, and
 the internal oscillator will be phase-locked to the 10MHz GPSDO
 reference. If the GPSDO is not locked to satellites, the VITA time
 will not be initialized."

That is only, as far as I know, for the "in skin" internal GPSDO.

--
Marcus Leech
Principal Investigator
Shirleys Bay Radio Astronomy Consortium
http://www.sbrac.org

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

Simon, If you follow the instructions here, and burn the EEPROM, the USRP will be configured to select the GPSDO 10 MHz and 1 PPS by default. As indicated in the installation instructions provided with the GPSDO, you will have to move a jumper that will connect the GPSDO 10 MHz, and disconnect the external 10 MHz reference. You should not need to do anything with the .hdl code. Have I properly understood your questions? -John On 6/3/2012 2:39 PM, Simon HB9DRV wrote: > > Hi Marcus, > > Thanks -- it's the internal GPSDO I'll be using. The oscillator phase > noise is very good. > > Simon Brown, HB9DRV > http://dit-dit-dit.com <http://dit-dit-dit.com/> > > You are standing at the end of a road before a small brick building. > Around you is a forest. > > A small stream flows out of the building and down a gully. The sunspot > count is 285. > > *From:*Marcus D. Leech [mailto:mleech@ripnet.com] > *Sent:* 03 June 2012 18:37 > *To:* Simon HB9DRV > *Cc:* usrp-users@lists.ettus.com > *Subject:* Re: [USRP-users] GPSDO Support > > Hi, > > Via UHD.dll or flipping switches? It looks like I'll be buying one > anyway, the phase noise spec is very good. > > Searching the UHD.dl source code I see this which indicates that > it's used automagically: > > "By default, if a GPSDO is detected at startup, the USRP will be > configured to use it as a frequency and time reference. The > internal VITA timestamp will be initialized to the GPS time, and > the internal oscillator will be phase-locked to the 10MHz GPSDO > reference. If the GPSDO is not locked to satellites, the VITA time > will not be initialized." > > That is only, as far as I know, for the "in skin" internal GPSDO. > > > > > -- > Marcus Leech > Principal Investigator > Shirleys Bay Radio Astronomy Consortium > http://www.sbrac.org > > > _______________________________________________ > USRP-users mailing list > USRP-users@lists.ettus.com > http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com

SH

Simon HB9DRV

Mon, Jun 4, 2012 4:02 PM

Hi John,

Yes, you've explained it. I assume the EEPROM burning instructions will be
shipped with the GPSDO?

Simon Brown, HB9DRV
http://dit-dit-dit.com/ http://dit-dit-dit.com

You are standing at the end of a road before a small brick building. Around
you is a forest.

A small stream flows out of the building and down a gully. The sunspot count
is 285.

From: usrp-users-bounces@lists.ettus.com
[mailto:usrp-users-bounces@lists.ettus.com] On Behalf Of John Malsbury

If you follow the instructions here, and burn the EEPROM, the USRP will be
configured to select the GPSDO 10 MHz and 1 PPS by default. As indicated in
the installation instructions provided with the GPSDO, you will have to move
a jumper that will connect the GPSDO 10 MHz, and disconnect the external 10
MHz reference. You should not need to do anything with the .hdl code.

Have I properly understood your questions?

Hi John, Yes, you've explained it. I assume the EEPROM burning instructions will be shipped with the GPSDO? Simon Brown, HB9DRV <http://dit-dit-dit.com/> http://dit-dit-dit.com You are standing at the end of a road before a small brick building. Around you is a forest. A small stream flows out of the building and down a gully. The sunspot count is 285. From: usrp-users-bounces@lists.ettus.com [mailto:usrp-users-bounces@lists.ettus.com] On Behalf Of John Malsbury If you follow the instructions here, and burn the EEPROM, the USRP will be configured to select the GPSDO 10 MHz and 1 PPS by default. As indicated in the installation instructions provided with the GPSDO, you will have to move a jumper that will connect the GPSDO 10 MHz, and disconnect the external 10 MHz reference. You should not need to do anything with the .hdl code. Have I properly understood your questions?

JM

John Malsbury

Mon, Jun 4, 2012 4:05 PM

I'm sorry, I forgot to include a link.

http://files.ettus.com/uhd_docs/manual/html/gpsdo.html

-John

On 6/4/2012 9:02 AM, Simon HB9DRV wrote:

Hi John,

Yes, you've explained it. I assume the EEPROM burning instructions
will be shipped with the GPSDO?

Simon Brown, HB9DRV
http://dit-dit-dit.com http://dit-dit-dit.com/

You are standing at the end of a road before a small brick building.
Around you is a forest.

A small stream flows out of the building and down a gully. The sunspot
count is 285.

*From:*usrp-users-bounces@lists.ettus.com
[mailto:usrp-users-bounces@lists.ettus.com] *On Behalf Of *John Malsbury

If you follow the instructions here, and burn the EEPROM, the USRP
will be configured to select the GPSDO 10 MHz and 1 PPS by default.
As indicated in the installation instructions provided with the GPSDO,
you will have to move a jumper that will connect the GPSDO 10 MHz, and
disconnect the external 10 MHz reference. You should not need to do
anything with the .hdl code.

Have I properly understood your questions?

I'm sorry, I forgot to include a link. http://files.ettus.com/uhd_docs/manual/html/gpsdo.html -John On 6/4/2012 9:02 AM, Simon HB9DRV wrote: > > Hi John, > > Yes, you've explained it. I assume the EEPROM burning instructions > will be shipped with the GPSDO? > > Simon Brown, HB9DRV > http://dit-dit-dit.com <http://dit-dit-dit.com/> > > You are standing at the end of a road before a small brick building. > Around you is a forest. > > A small stream flows out of the building and down a gully. The sunspot > count is 285. > > *From:*usrp-users-bounces@lists.ettus.com > [mailto:usrp-users-bounces@lists.ettus.com] *On Behalf Of *John Malsbury > > > If you follow the instructions here, and burn the EEPROM, the USRP > will be configured to select the GPSDO 10 MHz and 1 PPS by default. > As indicated in the installation instructions provided with the GPSDO, > you will have to move a jumper that will connect the GPSDO 10 MHz, and > disconnect the external 10 MHz reference. You should not need to do > anything with the .hdl code. > > Have I properly understood your questions? >