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View all threadsHow to use External LO on N310 device?
Hi ,
Has anyone tested an external local oscillator on N310 ?
I tried to set LO to external.But can't receive the correct signal.
This is my code to set LO source:
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
On 2021-10-25 4:18 a.m., zeyuan.li@zengyi-tech.com wrote:
Hi ,
Has anyone tested an external local oscillator on N310 ?
I tried to set LO to external.But can't receive the correct signal.
This is my code to set LO source:
Keep in mind that the external LO must be at TWICE the desired center
frequency, due to the use of 2XLO mixers.
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
USRP-users mailing list -- usrp-users@lists.ettus.com
To unsubscribe send an email to usrp-users-leave@lists.ettus.com
Also: You need to set external LO during device creation. Doing so during
runtime is supposed to work,
but I've never actually tried that method. Setting during as noted can be
made to work. - MLD
On Mon, Oct 25, 2021 at 9:29 AM Marcus D. Leech patchvonbraun@gmail.com
wrote:
On 2021-10-25 4:18 a.m., zeyuan.li@zengyi-tech.com wrote:
Hi ,
Has anyone tested an external local oscillator on N310 ?
I tried to set LO to external.But can't receive the correct signal.
This is my code to set LO source:
Keep in mind that the external LO must be at TWICE the desired center
frequency, due to the use of 2XLO mixers.
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
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
I used TWICE frequency. But it doesn’t work.
Have you tried successfully already?
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25日 21:29
收件人: usrp-users@lists.ettus.com
主题: [USRP-users] Re: How to use External LO on N310 device?
On 2021-10-25 4:18 a.m., zeyuan.li@zengyi-tech.com mailto:zeyuan.li@zengyi-tech.com wrote:
Hi ,
Has anyone tested an external local oscillator on N310 ?
I tried to set LO to external.But can't receive the correct signal.
This is my code to set LO source:
Keep in mind that the external LO must be at TWICE the desired center frequency, due to the use of 2XLO mixers.
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
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 2021-10-25 22:22, 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.
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 ?
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26日 11:40
收件人: zeyuan.li@zengyi-tech.com; 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 2021-10-26 00:09, 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 patchvonbraun@gmail.com
*发送时间:*2021年10月26日11:40
*收件人:*zeyuan.li@zengyi-tech.com; 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 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.
I will try it . Thanks very much !
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26日 22:49
收件人: zeyuan.li@zengyi-tech.com; 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.
Excuse,could you tell me where can I find mpm.conf file in N310 system file ?
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26日 22:49
收件人: zeyuan.li@zengyi-tech.com; 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 2021-10-26 23:14, 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 patchvonbraun@gmail.com
*发送时间:*2021年10月26日22:49
*收件人:*zeyuan.li@zengyi-tech.com; 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 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 <patchvonbraun@gmail.com>
<mailto:patchvonbraun@gmail.com>
*发送时间:*2021年10月26日11:40
*收件人:*zeyuan.li@zengyi-tech.com; 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 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.