The attached plot shows our typical sawtooth behavior in the timing system. The PPS signals compare the 1 PPS signal from our timing system against other GPS units and the atomic clock. All of these comparisons show this sawtooth indicating it is a feature of our timing system. The master GPS unit which feeds our timing system is a Trimble unit. The GPS_A_PPSOFFSET channel is an internal readback which is read through an RS232. It shows ~80ns single second jumps up and down in synchronization with our sawtooth. This might be an indication that the sawtooth originates in the Trimple. The OCXERROR channels shows the 1 PPS comparison between the timing system and the Trimble unit. It is uses as an error signal for the timing master OCXO. Units are ns except for the OCXERROR which is in seconds. The -1450 ns offset is in the atomic clock.