Does anyone know if there is a way to get predictable phase offsets from an X410? I am finding that from run-to-run, the 4 channels in an X410 have completely random phase offsets from each other. I didn’t necessarily expect the phase offsets to be zero, but was hoping they would at least be consistent.
John From: Chris Rogers <c1337rog...@gmail.com> Sent: Thursday, March 27, 2025 1:51 PM To: Marcus D. Leech <patchvonbr...@gmail.com> Cc: usrp-users@lists.ettus.com Subject: [EXT] [USRP-users] Re: X440 Phase Coherent but not Phase Aligned Hi Heath and Marcus, I was actually "R&D's plate" for this one. We worked through it and found the issue. The root cause is the startup sequence in almost every example UHD script is a bit out of order and had to be reorganized ZjQcmQRYFpfptBannerStart This Message Is From an External Sender This message came from outside the Laboratory. ZjQcmQRYFpfptBannerEnd Hi Heath and Marcus, I was actually "R&D's plate" for this one. We worked through it and found the issue. The root cause is the startup sequence in almost every example UHD script is a bit out of order and had to be reorganized in terms of clock setup and synchronized channel tuning. This problem is fixed in UHD 4.7+ if you look at the "tx_waveforms.cpp" example code... For your application, just make sure to follow the same startup sequence. Hope this helps, Chris
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