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versalogic_vl-mpeu-g2_ntp [2014/06/21 18:47] – [PC Engines APU / Versalogic - NTP server] admin | versalogic_vl-mpeu-g2_ntp [2014/06/21 19:11] – [Configure, firmware update ublox NEO-7 module] admin |
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~~TOC~~ | ~~TOC~~ |
=====PC Engines APU / Versalogic - NTP server==== | =====PC Engines APU / Versalogic - NTP server==== |
This guide will help you create an NTP server using the [[http://pcengines.ch/apu.htm|PC Enginges APU]] system board, the [[http://www.versalogic.com|Versalogic]] GPS module and the [[http://www.startech.com|StartTech]] serial port module. I'm using the ATOM PPS refclock, because i didn't want to use the console port (serial) for the PPS. | This guide will help you create an NTP server using the [[http://pcengines.ch/apu.htm|PC Enginges APU]] system board, the [[http://www.versalogic.com|Versalogic]] GPS module and the [[http://www.startech.com|StartTech]] serial port module. I'm using the ATOM PPS refclock source, because PPS is'nt provided via /dev/ttyACM0. |
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{{::pd0b-ip5_img_1409.jpg?300|}} | {{::pd0b-ip5_img_1409.jpg?300|}} |
===Recommended settings for timing applications=== | ===Recommended settings for timing applications=== |
* SBAS -> Subsystem: Disabled. | * SBAS -> Subsystem: Disabled. |
* (not supported on u-blox 7) TMODE2 -> Survey-in. If the position is known, the receiver can provide an accurate time solution by tracking only one satellite. For an unknown position, the receiver needs a minimum of four satellites to calculate a position fix and to solve for a timing solution. This is known as survey-in and can be chosen using the UBX-CFG-TMODE2 message. It is recommended to use survey-in only for non-moving platform applications. For optimal performance a known fixed position of the antenna should be used. | * (not supported by u-blox 7) TMODE2 -> Survey-in. If the position is known, the receiver can provide an accurate time solution by tracking only one satellite. For an unknown position, the receiver needs a minimum of four satellites to calculate a position fix and to solve for a timing solution. This is known as survey-in and can be chosen using the UBX-CFG-TMODE2 message. It is recommended to use survey-in only for non-moving platform applications. For optimal performance a known fixed position of the antenna should be used. |
* NAV5 -> Dynamic Model: Stationary | * NAV5 -> Dynamic Model: Stationary |
* NAV5 -> Min SV Elevation: 10 | * NAV5 -> Min SV Elevation: 10 |
* Save config, restart receiver. Receiver -> Action -> Cold start | * Save config, restart receiver. Receiver -> Action -> Cold start |