I'm doing 4-channel receive, using a power splitter to send the same CW signal into all 4 d'cards, and tuning them all identically.
3 of the 4 channels are nicely phase-locked. The 4th seems a little...off.
ClockMasterUSRP (Serial #5821): Side A: "red" channel ClockMasterUSRP (Serial #5821): Side B: "green" channel ClockSlaveUSRP (Serial #2087): Side A: "blue" channel ClockSlaveUSRP (Serial #2087): Side B: "black" channel <--- problem with this guy