Hayden, When running DEBUG = 32, I see the following, but, only on occasion, say every minute or so: 06/01/2018 00:22:12.240 Warning: GPS Data time period elapsed GPS-DEBUG: $GPRMC,002213.00,A,4131.82046,N,08702.05712,W,0.027,,010618,,,D*6D GPS-DEBUG: mon: 5, gps_time: 1527812533, ctime: Fri Jun 1 00:22:13 2018 I suspect this has to do with the receiver losing lock. However, it doesn’t make sense as the receiver reports a strong signal and doesn’t show signs of loss of signal on the front alarm panel. The GPS antenna is designed with high RF immunity and is at a site with little activity. Kindest Regards, Kevin Babich | N9IAA Valparaiso, IN 46383 From: App_rpt-users <app_rpt-users-bounces@lists.allstarlink.org> On Behalf Of Hayden Honeywood Sent: Thursday, May 31, 2018 5:56 PM To: app_rpt-users@lists.allstarlink.org Subject: Re: [App_rpt-users] RTCM [RX Packet Out of Bounds] ***Updated*** Is the time in UTC? How far off is the system time? Have you done a full calibration of each board? What baud rate do you run on your GPS's? I tend to use 9600 baud and have had no issues with the GPS's I have used. There is various GPS debug tools available in the RTCM. They are documented here - https://wiki.allstarlink.org/wiki/RTCM_Client#GPS Can you possibly try injecting a 9.6MHz signal in place of the crystal on board? Perhaps you have a variant of James KI0KN's problem where his crystals were off frequency. I can't comment on that as I built all my boards and they have external frequency references. Regards Hayden VK7HH From: App_rpt-users <app_rpt-users-bounces@lists.allstarlink.org <mailto:app_rpt-users-bounces@lists.allstarlink.org> > On Behalf Of Hayden Honeywood Sent: Wednesday, May 30, 2018 5:34 PM To: app_rpt-users@lists.allstarlink.org <mailto:app_rpt-users@lists.allstarlink.org> Subject: Re: [App_rpt-users] RTCM [RX Packet Out of Bounds] ***Updated*** What is your values in voter.conf for RX buffer (960) and in the RTCM client for TX buffer (480). Are all RTCM TX buffers set to the same value? Yes, 480. These values were based upon the math Jim provided, which is a function of maximum latencies on the network. We rarely have greater than 1ms to any host on the network. Are all the GPS's in a location where they cannot be swamped with RF? Yes, and they utilize PCTEL antennas with filtering for use in RF dense environments. Some users have had success with a dedicated RTCM as the master timing source (with no radio connected). Has it been suspected that an RTCM doesn’t have the horsepower to handle both functions contemporaneously? Regards Hayden VK7HH