On 2022-08-11 15:27, Wan Liu wrote:
Hello Skyung,
Can you please explain what each N310 is doing in this set up?
The reason you would sync two N310s using external sources like 10 MHz
clock ref, PPS, or GPSDO is to ensure that baseband samples are
aligned, or use cases like MIMO or TDOA. I am not sure about time
source sync using NTP...
N310 also has ethernet-based sync using the White Rabbit protocol over
optical cables, see this app note
https://kb.ettus.com/Using_Ethernet-Based_Synchronization_on_the_USRP%E2%84%A2_N3xx_Devices.
However, I'm not aware that sync over NTP is a feature.
Internally, there are two AD9371 transceivers, which can be
synchronized using the built-in clock system for MIMO operation.
Regards,
Wan
The Linux CPU portion could benefit from NTP over the management
interface, but compared to the GPSDO that's built-in,
it's a poor substitute....
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