List: usrp-users@lists.ettus.com
From: Pat Daderko
Re: X310 1PPS timing depends on 1PPS/10 MHz phase - only 100ns resolution?
Wed, Jul 2, 2025 6:12 AM
Rather than the 1PPS always being on the rising 10 MHz edge and driving that to 0 ns UTC, this GPSDO puts the 1PPS at 0 ns UTC (regardless of where that is relative to the 10 MHz) and then phase locks the 10 MHz and 1PPS. So, one power cycle it can be at the rising edge, another it can be at the falling edge, and another it can be somewhere in between.