Hi Kevin, Sorry keep getting confused... the VOTER (thru-hole) board lets you do a Diode calibration. I think the RTCM has the same functionality... it's documented in the manual, but not detailed. It has the switch for it anyway... OK on the baud rate and the messages you have in debug. I'm pretty sure the time on the RTCM's references the master timing source - which has the app_rpt host connected on the same network. Have you checked that your host has the correct time. The only time I saw the GPS Data Time period elasped error was running 4800 baud on the Garmin puck receivers. I changed this to 9600 which fixed the issue. Hayden