diff options
| -rw-r--r-- | host/docs/sync.dox | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/host/docs/sync.dox b/host/docs/sync.dox index 8c16eb046..aaae88702 100644 --- a/host/docs/sync.dox +++ b/host/docs/sync.dox @@ -152,7 +152,7 @@ metadata should have a time spec set: : size_t num_tx_samps = tx_streamer->send(buffs, samps_to_send, md); ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ -\subsection sync_phase_lo Align LOs in the front-end (SBX, WBX, CBX) +\subsection sync_phase_lo Align LOs in the front-end (SBX, WBX, UBX) Using timed commands, multiple frontends can be tuned at a specific time. This timed-tuning ensures that the phase offsets between VCO/PLL @@ -161,7 +161,9 @@ chains will remain constant after each re-tune. See notes below: - There is a random phase offset between any two frontends - This phase offset is different for different LO frequencies - This phase offset remains constant after retuning - - Due to a divider, WBX phase offset will be randomly +/- 180 deg after re-tune + - Due to a divider, WBX phase offset will be randomly +/- 180 deg after re-tune on all USRPs. + - Due to a divider, UBX phase offset will be randomly +/- 180 deg after re-tune on N200/N210. + On X300/X310, phase sync with UBX fully works. - This phase offset will drift over time due to thermal and other characteristics - Periodic calibration will be necessary for phase-coherent applications |