UG-1828
Preliminary Technical Data
Rev. PrC | Page 94 of 338
Note that the MCS_to_Strobe delay difference between different channels should be within 2 samples.
Note on the Rx side, functions to calculate sample delay and read delay are user defined. We recommend user to use the default values
provided in the software. And we also provide user to do adjustment using the above method. Fundamentally this is controlled by the
user from the baseband processor, and user will have full control on how data is timed. In contrast, for Tx side, ADRV9001 will not have
control how data will be passed in, therefore will try to adjust the different delays and try to align the data in time.
PHASE SYNCHRONIZATION
The preliminary characterization of the phase synchronization is shown below. More updates will be provided in future releases.
The following plots are trying to show the effect of the phase synchronization function. The test is done with two Rx signals coming from
the same signal source. Signal is using CW tones. The reference clock frequency is set to 38.4 MHz. We use LTE61.44 profile for this test.
The test is run from 100 MHz to 3GHz with a 100 MHz step, using internal LOs. We also used 5 different ADRV9001 chips for the test.
Figure 88, shows the effect of phase synchronization for the receiving signals. Signals are captured at the interface for phase error
calculation
Figure 88 Phase Error after synchronization between two Receivers
