Hi,

I am trying to understand timestamp tracking in FPGA and noticed one
possible issue in axi_rate_change.v module .

VITA time in packet headers is counted in ticks of master clock frequency,
i.e. 200 MHz. For me it looks like axi_rate_change adjusts time by adding
time from the first packet in a group to number of samples sent out which
are actually downsampled in case of DDC and may have lower sampling
frequency. That is probably incorrect unless I understand the code.  Does
it only work because output packet always starts from input packet boundary
so vita_time_reg is never used?


thanks,
Dmitry
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