USRP synchronization over large distance

[matthewsmb]

We are looking to phase synchronize several USRP devices with large separation (~100m). I understand that time-varying properties of coaxial cable preclude a solution based on Octoclock sync distribution even with frequent calibration. Is there a preferred method of sync distribution over large distance(laser, fiber optic)?

[tcap]

Hello Matt,

Have you taken a look at this article?

https://www.ni.com/en/shop/wireless-design-test/what-is-a-usrp-software-defined-radio/global-synchro...

I recommend using GPS to Sync.

Regards,

[matthewsmb]

Thank you, Thomas. For our application we need phase synchronization to within 3 mRadians, which I believe GPS synchronization cannot achieve.

[tcap]

Hello,

I am not sure off the top of my head.

Recommend reaching out to your local NI representative. They will have a lot of resources to help design your system.

Regards,

[National_Burritos]

Continued on the HW forum here:

http://forums.ni.com/t5/USRP-Software-Radio/USRP-phase-synchroniz-ation-over-large-distance/m-p/3253...