NTP / PPS GPS_ntpd - Time Error - PPS Jitter Exceeded
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@pete said in NTP / PPS GPS_ntpd - Time Error - PPS Jitter Exceeded:
Services / NTP / Serial GPS / Flags
Enable kernel PPS clock discipline (default: checked).AFAIK
This tells FreeBSD to use Kernel PPS dicipline
Services / NTP / Serial GPS / Flags
Enable kernel PPS clock discipline (default: checked).Wo. that option ticked , i seem to remember it's the NTP driver handling the 1PPS , and it's less picky.
My gutfeeling is still that it's triggered by GPS Sync lock "Miss"
/Bingo
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So does that mean the default option should be "unticked"?
Not getting any PPS Jitter Exceeded log entries on the SureGPS and U-Blox GPS with PPS.
I did purchase two more U-Blox modules with old firmware.
One of them flashed fine to current firmware and the other said it did not recognize the flash memory.
Identifying receiver updater version at 115200 baud. Firmware loader version 5.01 detected. Suitable Multi-ROM image found Check pass: u-blox8 Multi-ROM image -> u-blox8 ROM2.01-receiver No valid FW header found in Flash: 0x00000000. Identifying Flash Flash: ManID=0x68, DevID=0x4013 Flash device not supported Done in 6.4 sec. Statistics: Erases sent: 0 Writes sent: 0 Erase timeouts: 0 Write timeouts: 0and the other one worked:
$GNTXT,01,01,02,ANTSTATUS=OK*25 18:00:44 $GNTXT,01,01,02,u-blox AG - www.u-blox.com*4E 18:00:44 $GNTXT,01,01,02,HW UBX-M8030 00080000*60 18:00:44 $GNTXT,01,01,02,EXT CORE 3.01 (107900)*33 18:00:44 $GNTXT,01,01,02,ROM BASE 2.01 (75331)*19 18:00:44 $GNTXT,01,01,02,FWVER=SPG 3.01*46 18:00:44 $GNTXT,01,01,02,PROTVER=18.00*11 18:00:44 $GNTXT,01,01,02,FIS=0xEF4015 (84524)*67 18:00:44 $GNTXT,01,01,02,GPS;GLO;GAL;BDS*77 18:00:44 $GNTXT,01,01,02,SBAS;IMES;QZSS*49 18:00:44 $GNTXT,01,01,02,GNSS OTP=GPS;GLO*37 18:00:44 $GNTXT,01,01,02,LLC=FFFFFFFF-FFFFFFED-FFFFFFFF-FFFFFFFF-FFFFFF69*23 18:00:44 $GNTXT,01,01,02,ANTSUPERV=AC SD PDoS SR*3E 18:00:44 $GNTXT,01,01,02,ANTSTATUS=OK*25 18:00:44 $GNTXT,01,01,02,PF=3FF*4B -
@pete said in NTP / PPS GPS_ntpd - Time Error - PPS Jitter Exceeded:
So does that mean the default option should be "unticked"?
The kernel PPS is more "picky" , and the NTP PPS ought to be good enoguh for timekeeping.
Not getting any PPS Jitter Exceeded log entries on the SureGPS and U-Blox GPS with PPS.
I did purchase two more U-Blox modules with old firmware.
One of them flashed fine to current firmware and the other said it did not recognize the flash memory.
Identifying receiver updater version at 115200 baud. Firmware loader version 5.01 detected. Suitable Multi-ROM image found Check pass: u-blox8 Multi-ROM image -> u-blox8 ROM2.01-receiver No valid FW header found in Flash: 0x00000000. Identifying Flash Flash: ManID=0x68, DevID=0x4013 Flash device not supported Done in 6.4 sec. Statistics: Erases sent: 0 Writes sent: 0 Erase timeouts: 0 Write timeouts: 0and the other one worked:
$GNTXT,01,01,02,ANTSTATUS=OK*25 18:00:44 $GNTXT,01,01,02,u-blox AG - www.u-blox.com*4E 18:00:44 $GNTXT,01,01,02,HW UBX-M8030 00080000*60 18:00:44 $GNTXT,01,01,02,EXT CORE 3.01 (107900)*33 18:00:44 $GNTXT,01,01,02,ROM BASE 2.01 (75331)*19 18:00:44 $GNTXT,01,01,02,FWVER=SPG 3.01*46 18:00:44 $GNTXT,01,01,02,PROTVER=18.00*11 18:00:44 $GNTXT,01,01,02,FIS=0xEF4015 (84524)*67 18:00:44 $GNTXT,01,01,02,GPS;GLO;GAL;BDS*77 18:00:44 $GNTXT,01,01,02,SBAS;IMES;QZSS*49 18:00:44 $GNTXT,01,01,02,GNSS OTP=GPS;GLO*37 18:00:44 $GNTXT,01,01,02,LLC=FFFFFFFF-FFFFFFED-FFFFFFFF-FFFFFFFF-FFFFFF69*23 18:00:44 $GNTXT,01,01,02,ANTSUPERV=AC SD PDoS SR*3E 18:00:44 $GNTXT,01,01,02,ANTSTATUS=OK*25 18:00:44 $GNTXT,01,01,02,PF=3FF*4BBuying those can be a "lottery"
I like the "Older" LEA-5T , as it's designed for timing (The T at the end), and at a price i can afford (will pay)
https://www.ebay.com/itm/254603722675LEA-6T or 8T are nicer but a lot pricier , and the 5T is good enough for me.
Beware , the Antenna plug is SMB M (you'd want a SMB F to SMA F adapter)
https://www.ebay.com/itm/202466110634And the connector plug is 2mm , but easy enough to solder on. If you don't have any 2mm plugs & ribbon cable.
You can "Sneak" 2.54mm Dupont wires into the plug , but it's a tight fit.
/Bingo
