Each day I seem to get between 2 and a dozen or so messages about the clock not synchronizing. Except for one of these messages, they seem to appear in pairs about a minute apart, one up, one down. Oct 07 06:51:51 adsbx readsb[453]: SDR ppm out of specification (could cause MLAT issues) or local clock jumped / not syncing with ntp or chrony! ppm: -621 Oct 07 06:52:21 adsbx readsb[453]: SDR ppm out of specification (could cause MLAT issues) or local clock jumped / not syncing with ntp or chrony! ppm: 619 Oct 07 07:32:54 adsbx readsb[453]: SDR ppm out of specification (could cause MLAT issues) or local clock jumped / not syncing with ntp or chrony! ppm: -624 Oct 07 07:33:24 adsbx readsb[453]: SDR ppm out of specification (could cause MLAT issues) or local clock jumped / not syncing with ntp or chrony! ppm: 621 Oct 07 08:35:58 adsbx readsb[453]: SDR ppm out of specification (could cause MLAT issues) or local clock jumped / not syncing with ntp or chrony! ppm: 832 Oct 07 12:55:18 adsbx readsb[453]: SDR ppm out of specification (could cause MLAT issues) or local clock jumped / not syncing with ntp or chrony! ppm: -657 Oct 07 12:55:48 adsbx readsb[453]: SDR ppm out of specification (could cause MLAT issues) or local clock jumped / not syncing with ntp or chrony! ppm: 656 Oct 07 13:35:21 adsbx readsb[453]: SDR ppm out of specification (could cause MLAT issues) or local clock jumped / not syncing with ntp or chrony! ppm: -640 Oct 07 13:35:51 adsbx readsb[453]: SDR ppm out of specification (could cause MLAT issues) or local clock jumped / not syncing with ntp or chrony! ppm: 638 Oct 07 14:01:53 adsbx readsb[453]: SDR ppm out of specification (could cause MLAT issues) or local clock jumped / not syncing with ntp or chrony! ppm: -787 Oct 07 14:02:23 adsbx readsb[453]: SDR ppm out of specification (could cause MLAT issues) or local clock jumped / not syncing with ntp or chrony! ppm: 788 Is this a problem? Any ideas on how to fix it? I'm running the ADSBexchange image. 7.2. Thanks! ....John