Re: [USRP-users] Phase calibration of multiple B210s

>>> Thank you Marcus. I feel it will be the same story if I use two X310s? >>> I look a bit at the project gr-doa and as I understand it seems to just require the calibration once. I'm not sure if there is a critical difference between the WBX/CBX vs. TwinRX for this task though. >>> I forgot one

Re: [USRP-users] Phase calibration of multiple B210s

See this link which shows the phase sync capability for the various X310 daughterboards such as UBX, SBX, CBX, and WBX. Note that the CBX does not have phase sync and the WBX has a 180 deg ambiguity. Rob On Thu, Jun 11, 2

Re: [USRP-users] Phase calibration of multiple B210s

Thank you very much for clearing that up. -Hai On Thu, Jun 11, 2020 at 1:11 AM Marcus D Leech wrote: > There are critical differences. The X310 was designed to provide a phase > coherent infrastructure—with that coherence working across multiple units. > > The WBX and CBX both have phase resync

Re: [USRP-users] Phase calibration of multiple B210s

There are critical differences. The X310 was designed to provide a phase coherent infrastructure—with that coherence working across multiple units. The WBX and CBX both have phase resynch which helps tremendously. The TwinRx goes further and allows LO sharing, which provides even better fidelity

Re: [USRP-users] Phase calibration of multiple B210s

Thank you Marcus. I feel it will be the same story if I use two X310s? I look a bit at the project gr-doa and as I understand it seems to just require the calibration once. I'm not sure if there is a critical difference between the WBX/CBX vs. TwinRX for this task though. On Thu, Jun 11, 2020 at

Re: [USRP-users] Phase calibration of multiple B210s

No. It is the nature of PLL synthesizers that they won’t land at the same phase offset every time they’re tuned. In addition the DDC components in the FPGA aren’t necessarily going to be at the same phase offset every time. You’ll need to have a phase calibration on every run. Sent from my i

[USRP-users] Phase calibration of multiple B210s

Hello, I'm trying to do phase calibration for two B210s for a DoA application. I use a known tone with splitter and equal-length cables. The problem I'm having is, the phase difference between two corresponding channels of the USRP (for example, RX2 of radio A) seems to change not just between the