Hi Marcus,
Thanks for the link. 1.In the link they are mentioning to issue time command when aligning phase of multiple devices but is that required for a single device of say 2955 R which has four receivers? 2.Further do all four receivers share a same master oscillator in 2955R? 3.If I want to synchronize 2 or more 2955R do I need to use external reference or it can be done without that? 4.Will the synchronization done by using external reference be precise enough for doing interferometry using multiple receivers? Regards, Koyel ________________________________ From: USRP-users <usrp-users-boun...@lists.ettus.com> on behalf of Marcus D. Leech via USRP-users <usrp-users@lists.ettus.com> Sent: Wednesday, January 16, 2019 8:36:58 PM To: usrp-users@lists.ettus.com Subject: Re: [USRP-users] stability of USRP 2954R/2955R On 01/16/2019 05:39 AM, Koyel Das (Vehere) via USRP-users wrote: Hi, Is the phase difference between two receiving channels in USRP 2954 R or between any two channels of USRP 2955R stable? That is can I measure the phase difference using a power splitter and equal length cables and say that it will remain the same always or will it vary? Regards, Koyel If you use timed commands to tune it: https://files.ettus.com/manual/page_sync.html You can get a reasonably predictable phase-offset. But since analog effects (mostly temperature) will tend to change the fine-scale phase, you should probably re-cal on every run, depending on your tolerance for gross phase error.
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