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Discussion and technical support related to USRP, UHD, RFNoC
View all threadsHow to use External LO on N310 device?
I set the correct device arguments,but it doesn’t work correctly and also there is no error report.
I don’t what can I do next .
So I want to config this argument in mpm.conf file or usrp_hwd.conf file to try to use external LO .
I couldn’t find this file named "usrp-hwd.conf" in “/usr” .and also “mpm.conf”
谢谢，有任何问题请随时与我联系！
——————————————————————
李泽远|研发工程师
北京曾益科技有限公司
手机：13121162044
地址：北京市海淀区中关村大街中关村SOHO 1108
网址：www.zengyi-tech.com http://www.zengyi-tech.com
发件人: Marcus D. Leech patchvonbraun@gmail.com
发送时间: 2021年10月27日 11:21
收件人: zeyuan.li@zengyi-tech.com; usrp-users@lists.ettus.com
主题: [USRP-users] Re: 答复: 答复: Re: 答复: Re: How to use External LO on N310 device?
On 2021-10-26 23:14, zeyuan.li@zengyi-tech.com mailto:zeyuan.li@zengyi-tech.com wrote:
Excuse,could you tell me where can I find mpm.conf file in N310 system file ?
You absolutely shouldn't need to modify the MPM configuration to use external LO.
I don't happen to know off the top of my head, but it gets started as usrp-hwd by systemd.
Find /usr -name "usrp-hwd.conf" when you're logged in to it should find it.
But, I must emphasize AGAIN. To use external LO, you don't need to modify MPMs configuration at all.
You just need the correct device arguments when you're creating the USRP device within your application.
谢谢，有任何问题请随时与我联系！
——————————————————————
李泽远|研发工程师
北京曾益科技有限公司
手机：13121162044
地址：北京市海淀区中关村大街中关村SOHO 1108
网址：www.zengyi-tech.com http://www.zengyi-tech.com
发件人: Marcus D. Leech mailto:patchvonbraun@gmail.com patchvonbraun@gmail.com
发送时间: 2021年10月26日 22:49
收件人: zeyuan.li@zengyi-tech.com mailto:zeyuan.li@zengyi-tech.com ; usrp-users@lists.ettus.com mailto:usrp-users@lists.ettus.com
主题: Re: 答复: [USRP-users] Re: 答复: Re: How to use External LO on N310 device?
On 2021-10-26 00:09, zeyuan.li@zengyi-tech.com mailto:zeyuan.li@zengyi-tech.com wrote:
Do you mean that I need to change MPM config files, and than reboot the N310 ?
Does the N310 LO source will be changed to external when I complete these above steps ?
No, you don't have to reconfigure MPM.
But look at the table of device arguments--there's a 'rx_lo_source' argument that must be set to "external". This is what Michael Dickens was
talking about in his reply to you yesterday.
If this still doesn't work, please share with us the pieces of code that you are using to set-up external LO ,so that we might spot any errors in that
code.
谢谢，有任何问题请随时与我联系！
——————————————————————
李泽远|研发工程师
北京曾益科技有限公司
手机：13121162044
地址：北京市海淀区中关村大街中关村SOHO 1108
网址：www.zengyi-tech.com http://www.zengyi-tech.com
发件人: Marcus D. Leech mailto:patchvonbraun@gmail.com patchvonbraun@gmail.com
发送时间: 2021年10月26日 11:40
收件人: zeyuan.li@zengyi-tech.com mailto:zeyuan.li@zengyi-tech.com ; usrp-users@lists.ettus.com mailto:usrp-users@lists.ettus.com
主题: [USRP-users] Re: 答复: Re: How to use External LO on N310 device?
On 2021-10-25 22:22, zeyuan.li@zengyi-tech.com mailto:zeyuan.li@zengyi-tech.com wrote:
I used TWICE frequency. But it doesn’t work.
Have you tried successfully already?
Spend some time with the online documentation for the N310 here:
https://files.ettus.com/manual/page_usrp_n3xx.html#n3xx_usage
There are device arguments you must pass to get the external LO to work.
On 2021-10-27 03:11, zeyuan.li@zengyi-tech.com wrote:
I set the correct device arguments,but it doesn’t work correctly and
also there is no error report.
I don’t what can I do next .
So I want to config this argument in mpm.conf file or usrp_hwd.conf
file to try to use external LO .
I couldn’t find this file named "usrp-hwd.conf" in “/usr” .and also
“mpm.conf”
Again, modifying the MPM config file is NOT necessary to get external LO
to work.
What frequency are you trying to use?
Can you share the lines of code you use to set up the N310 for shared LO
operation--including the initial device "make" with device arguments, etc.
Forgot to mention earlier: at device initialization you have to supply the
external LO at 5 GHz,
as well as set the device argument as noted. Once the device is fully
initialized then you can
change the center frequency & the supplied LO must be 2x that. Hope this
helps! - MLD
On Wed, Oct 27, 2021 at 9:51 AM Marcus D. Leech patchvonbraun@gmail.com
wrote:
On 2021-10-27 03:11, zeyuan.li@zengyi-tech.com wrote:
I set the correct device arguments,but it doesn’t work correctly and also
there is no error report.
I don’t what can I do next .
So I want to config this argument in mpm.conf file or usrp_hwd.conf file
to try to use external LO .
I couldn’t find this file named "usrp-hwd.conf" in “/usr” .and also
“mpm.conf”
Again, modifying the MPM config file is NOT necessary to get external LO
to work.
What frequency are you trying to use?
Can you share the lines of code you use to set up the N310 for shared LO
operation--including the initial device "make" with device arguments, etc.
USRP-users mailing list -- usrp-users@lists.ettus.com
To unsubscribe send an email to usrp-users-leave@lists.ettus.com
Michael / Ettus,
This procedure really needs to be added to the documentation. This is not
nearly the first time this happened.
Rob
On Wed, Oct 27, 2021 at 10:06 AM Michael Dickens michael.dickens@ettus.com
wrote:
Forgot to mention earlier: at device initialization you have to supply the
external LO at 5 GHz,
as well as set the device argument as noted. Once the device is fully
initialized then you can
change the center frequency & the supplied LO must be 2x that. Hope this
helps! - MLD
On Wed, Oct 27, 2021 at 9:51 AM Marcus D. Leech patchvonbraun@gmail.com
wrote:
On 2021-10-27 03:11, zeyuan.li@zengyi-tech.com wrote:
I set the correct device arguments,but it doesn’t work correctly and also
there is no error report.
I don’t what can I do next .
So I want to config this argument in mpm.conf file or usrp_hwd.conf file
to try to use external LO .
I couldn’t find this file named "usrp-hwd.conf" in “/usr” .and also
“mpm.conf”
Again, modifying the MPM config file is NOT necessary to get external LO
to work.
What frequency are you trying to use?
Can you share the lines of code you use to set up the N310 for shared LO
operation--including the initial device "make" with device arguments, etc.
USRP-users mailing list -- usrp-users@lists.ettus.com
To unsubscribe send an email to usrp-users-leave@lists.ettus.com
USRP-users mailing list -- usrp-users@lists.ettus.com
To unsubscribe send an email to usrp-users-leave@lists.ettus.com
Thanks and I will try it.
谢谢，有任何问题请随时与我联系！
——————————————————————
李泽远|研发工程师
北京曾益科技有限公司
手机：13121162044
地址：北京市海淀区中关村大街中关村SOHO 1108
网址： http://www.zengyi-tech.com www.zengyi-tech.com
发件人: Michael Dickens michael.dickens@ettus.com
发送时间: 2021年10月27日 22:06
收件人: Marcus D. Leech patchvonbraun@gmail.com
抄送: 李泽远 zeyuan.li@zengyi-tech.com; USRP list usrp-users@lists.ettus.com
主题: Re: [USRP-users] Re: 答复: Re: 答复: 答复: Re: 答复: Re: How to use External LO on N310 device?
Forgot to mention earlier: at device initialization you have to supply the external LO at 5 GHz,
as well as set the device argument as noted. Once the device is fully initialized then you can
change the center frequency & the supplied LO must be 2x that. Hope this helps! - MLD
On Wed, Oct 27, 2021 at 9:51 AM Marcus D. Leech <patchvonbraun@gmail.com mailto:patchvonbraun@gmail.com > wrote:
On 2021-10-27 03:11, zeyuan.li@zengyi-tech.com mailto:zeyuan.li@zengyi-tech.com wrote:
I set the correct device arguments,but it doesn’t work correctly and also there is no error report.
I don’t what can I do next .
So I want to config this argument in mpm.conf file or usrp_hwd.conf file to try to use external LO .
I couldn’t find this file named "usrp-hwd.conf" in “/usr” .and also “mpm.conf”
Again, modifying the MPM config file is NOT necessary to get external LO to work.
What frequency are you trying to use?
Can you share the lines of code you use to set up the N310 for shared LO operation--including the initial device "make" with device arguments, etc.
USRP-users mailing list -- usrp-users@lists.ettus.com mailto:usrp-users@lists.ettus.com
To unsubscribe send an email to usrp-users-leave@lists.ettus.com mailto:usrp-users-leave@lists.ettus.com
Hi Marcus,
I use a signal source output a tone at 5GHz .And I use N310 External LO mode,it received signal at 2.5GHz.
But I try to change LO Source to another frequency such as 4GHz. In this situation, the center frequency remain at 2.5GHz but not half of 4GHz.
I want to know what should I do when I try to change center frequency in External LO mode?
谢谢，有任何问题请随时与我联系！
——————————————————————
李泽远|研发工程师
北京曾益科技有限公司
手机：13121162044
地址：北京市海淀区中关村大街中关村SOHO 1108
网址： http://www.zengyi-tech.com www.zengyi-tech.com
发件人: Michael Dickens michael.dickens@ettus.com
发送时间: 2021年10月27日 22:06
收件人: Marcus D. Leech patchvonbraun@gmail.com
抄送: 李泽远 zeyuan.li@zengyi-tech.com; USRP list usrp-users@lists.ettus.com
主题: [USRP-users] Re: 答复: Re: 答复: 答复: Re: 答复: Re: How to use External LO on N310 device?
Forgot to mention earlier: at device initialization you have to supply the external LO at 5 GHz,
as well as set the device argument as noted. Once the device is fully initialized then you can
change the center frequency & the supplied LO must be 2x that. Hope this helps! - MLD
On Wed, Oct 27, 2021 at 9:51 AM Marcus D. Leech <patchvonbraun@gmail.com mailto:patchvonbraun@gmail.com > wrote:
On 2021-10-27 03:11, zeyuan.li@zengyi-tech.com mailto:zeyuan.li@zengyi-tech.com wrote:
I set the correct device arguments,but it doesn’t work correctly and also there is no error report.
I don’t what can I do next .
So I want to config this argument in mpm.conf file or usrp_hwd.conf file to try to use external LO .
I couldn’t find this file named "usrp-hwd.conf" in “/usr” .and also “mpm.conf”
Again, modifying the MPM config file is NOT necessary to get external LO to work.
What frequency are you trying to use?
Can you share the lines of code you use to set up the N310 for shared LO operation--including the initial device "make" with device arguments, etc.
USRP-users mailing list -- usrp-users@lists.ettus.com mailto:usrp-users@lists.ettus.com
To unsubscribe send an email to usrp-users-leave@lists.ettus.com mailto:usrp-users-leave@lists.ettus.com
On 2021-12-06 00:13, zeyuan.li@zengyi-tech.com wrote:
Hi Marcus,
I use a signal source output a tone at 5GHz .And I use N310 External
LO mode,it received signal at 2.5GHz.
But I try to change LO Source to another frequency such as 4GHz.In
this situation, the center frequency remain at 2.5GHz but not half of
4GHz.
I want to know what should I do when I try to change center frequency
in External LO mode?
Are you using external LO for TX or RX?
Perhaps you can share the code you're using to configure for external LO?
谢谢，有任何问题请随时与我联系！
——————————————————————
李泽远|研发工程师
北京曾益科技有限公司
手机：13121162044
地址：北京市海淀区中关村大街中关村SOHO 1108
网址：www.zengyi-tech.com http://www.zengyi-tech.com
*发件人:*Michael Dickens michael.dickens@ettus.com
*发送时间:*2021年10月27日22:06
*收件人:*Marcus D. Leech patchvonbraun@gmail.com
*抄送:*李泽远zeyuan.li@zengyi-tech.com; USRP list
usrp-users@lists.ettus.com
主题:[USRP-users] Re: 答复: Re: 答复: 答复: Re: 答复: Re: How to use
External LO on N310 device?
Forgot to mention earlier: at device initialization you have to supply
the external LO at 5 GHz,
as well as set the device argument as noted. Once the device is fully
initialized then you can
change the center frequency & the supplied LO must be 2x that. Hope
this helps! - MLD
On Wed, Oct 27, 2021 at 9:51 AM Marcus D. Leech
patchvonbraun@gmail.com wrote:
On 2021-10-27 03:11, zeyuan.li@zengyi-tech.com wrote:
I set the correct device arguments,but it doesn’t work
correctly and also there is no error report.
I don’t what can I do next .
So I want to config this argument in mpm.conf file or
usrp_hwd.conf file to try to use external LO .
I couldn’t find this file named "usrp-hwd.conf" in “/usr” .and
also “mpm.conf”
Again, modifying the MPM config file is NOT necessary to get
external LO to work.
What frequency are you trying to use?
Can you share the lines of code you use to set up the N310 for
shared LO operation--including the initial device "make" with
device arguments, etc.
_______________________________________________
USRP-users mailing list -- usrp-users@lists.ettus.com
To unsubscribe send an email to usrp-users-leave@lists.ettus.com
I do not set TX or RX.This is my python code.Please give me some suggestions.
Thinks.
谢谢，有任何问题请随时与我联系！
——————————————————————
李泽远|研发工程师
北京曾益科技有限公司
手机：13121162044
地址：北京市海淀区中关村大街中关村SOHO 1108
网址： http://www.zengyi-tech.com www.zengyi-tech.com
发件人: Marcus D. Leech patchvonbraun@gmail.com
发送时间: 2021年12月6日 22:21
收件人: zeyuan.li@zengyi-tech.com; 'Michael Dickens' michael.dickens@ettus.com
抄送: 'USRP list' usrp-users@lists.ettus.com
主题: [USRP-users] Re: 答复: Re: 答复: Re: 答复: 答复: Re: 答复: Re: How to use External LO on N310 device?
On 2021-12-06 00:13, zeyuan.li@zengyi-tech.com mailto:zeyuan.li@zengyi-tech.com wrote:
Hi Marcus,
I use a signal source output a tone at 5GHz .And I use N310 External LO mode,it received signal at 2.5GHz.
But I try to change LO Source to another frequency such as 4GHz. In this situation, the center frequency remain at 2.5GHz but not half of 4GHz.
I want to know what should I do when I try to change center frequency in External LO mode?
Are you using external LO for TX or RX?
Perhaps you can share the code you're using to configure for external LO?
谢谢，有任何问题请随时与我联系！
——————————————————————
李泽远|研发工程师
北京曾益科技有限公司
手机：13121162044
地址：北京市海淀区中关村大街中关村SOHO 1108
网址： http://www.zengyi-tech.com www.zengyi-tech.com
发件人: Michael Dickens mailto:michael.dickens@ettus.com michael.dickens@ettus.com
发送时间: 2021年10月27日 22:06
收件人: Marcus D. Leech mailto:patchvonbraun@gmail.com patchvonbraun@gmail.com
抄送: 李泽远 mailto:zeyuan.li@zengyi-tech.com zeyuan.li@zengyi-tech.com; USRP list mailto:usrp-users@lists.ettus.com usrp-users@lists.ettus.com
主题: [USRP-users] Re: 答复: Re: 答复: 答复: Re: 答复: Re: How to use External LO on N310 device?
Forgot to mention earlier: at device initialization you have to supply the external LO at 5 GHz,
as well as set the device argument as noted. Once the device is fully initialized then you can
change the center frequency & the supplied LO must be 2x that. Hope this helps! - MLD
On Wed, Oct 27, 2021 at 9:51 AM Marcus D. Leech <patchvonbraun@gmail.com mailto:patchvonbraun@gmail.com > wrote:
On 2021-10-27 03:11, zeyuan.li@zengyi-tech.com mailto:zeyuan.li@zengyi-tech.com wrote:
I set the correct device arguments,but it doesn’t work correctly and also there is no error report.
I don’t what can I do next .
So I want to config this argument in mpm.conf file or usrp_hwd.conf file to try to use external LO .
I couldn’t find this file named "usrp-hwd.conf" in “/usr” .and also “mpm.conf”
Again, modifying the MPM config file is NOT necessary to get external LO to work.
What frequency are you trying to use?
Can you share the lines of code you use to set up the N310 for shared LO operation--including the initial device "make" with device arguments, etc.
USRP-users mailing list -- usrp-users@lists.ettus.com mailto:usrp-users@lists.ettus.com
To unsubscribe send an email to usrp-users-leave@lists.ettus.com mailto:usrp-users-leave@lists.ettus.com
On 2021-12-08 02:05, zeyuan.li@zengyi-tech.com wrote:
I do not set TX or RX.This is my python code.Please give me some
suggestions.
Thinks.
Ah, you're using Gnu Radio. I'll have to think about how to meet the
constraints of external-LO use when using Gnu Radio.
Has anyone else done this?
I searched the code for "rx_lo_source=external" and
"tx_lo_source=external", but didn't find anything related. It seems that
the device args should include these.
On Wed, Dec 8, 2021 at 11:02 AM Marcus D. Leech patchvonbraun@gmail.com
wrote:
On 2021-12-08 02:05, zeyuan.li@zengyi-tech.com wrote:
I do not set TX or RX.This is my python code.Please give me some
suggestions.
Thinks.
Ah, you're using Gnu Radio. I'll have to think about how to meet the
constraints of external-LO use when using Gnu Radio.
Has anyone else done this?
USRP-users mailing list -- usrp-users@lists.ettus.com
To unsubscribe send an email to usrp-users-leave@lists.ettus.com