We have tested on whether the 4 receiving channel of QPCIe is synchronized.
We found that channel 0 and channel 1 is synchronized like LimeSDR-USB, there is no random phase delay between those 2 channels of the same LMS7002 chip. Also channel 2 and channel 3 of the other LMS7002 chip is synchronized with each other.
But when we are testing channel 1 and channel 2, that is 2 channels from different LMS7002 chip, we observed that it’s not perfectly synchronized. We used our 2 channel doa algorithm to test that, and found out some times the result will show a 30 degrees jump to the right. Can this be fixed?
Here’s our testing video when we were using channel 1 and channel 2 (from different LMS7002 chips)