we have implemented synchronized reception with two USRP2’s using a
clock and the 1PPS signal to be able to use the two ethernet interfaces.
works quite good but we observed one thing.
When we set the decimation rate to an odd number (5 in our case), the
are aligned perfectly. When we use an even numbered decimation rate, we
detect unalignments in some of our test runs with the same setup.
We have the idea that this is related to the way the decimation is
(refer to “Re: [Discuss-gnuradio] USRP2 Filtering/Decimation Question”
more details) i.e. if only the CIC is involved it works fine otherwise
are some troubles.
Does anybody have made similar observations or is able to tell more
Hanwen & Christoph