[[ntpgps]]

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ntpgps [2016/02/26 10:11]
admin
ntpgps [2016/02/26 10:21]
admin [ntp gps setup]
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 ====== ntp gps setup ====== ====== ntp gps setup ======
-This process has been complicated and messy, because of the combination of 1) I don't know what I'm doing, and 2) the resources on this are good but complicated. Almost everything I've figured out has come from these two pages:+This process has been complicated and messy, because of the combination of 1) I don't know what I'm doing, and 2) the resources on this are good but complicated. Almost everything I've figured out has come from these three pages:
   * http://​kenyonralph.com/​~kenyon/​Time_server/​   * http://​kenyonralph.com/​~kenyon/​Time_server/​
   * http://​superuser.com/​questions/​828036/​how-can-i-check-whether-my-ntp-daemon-has-pps-support   * http://​superuser.com/​questions/​828036/​how-can-i-check-whether-my-ntp-daemon-has-pps-support
 +  * http://​www.rjsystems.nl/​en/​2100-ntpd-garmin-gps-18-lvc-gpsd.php#​qrks
  
 I had to fill in a few holes here and there, so I am going to try and get a comprehensive guide in place here, because I will forget. ​ I had to fill in a few holes here and there, so I am going to try and get a comprehensive guide in place here, because I will forget. ​
- 
 ===== Setup ===== ===== Setup =====
   * dc7900 running ubu server 14.04   * dc7900 running ubu server 14.04
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-====== To Do ======+====== To D0 & Thoughts ​======
 Right now my offset and jitter can be improved. This can be done by: Right now my offset and jitter can be improved. This can be done by:
   * Disable all but GPGGA   * Disable all but GPGGA
   * Push pulse width to 200ms   * Push pulse width to 200ms
-  * Some people don't like, and have trouble with, the 18x LVC: http://​support.ntp.org/​bin/​view/​Support/​ConfiguringGarminRefclocks +  * Some people don't like, and have trouble with, the 18x LVC: 
-  * Similar to above: http://​support.ntp.org/​bin/​view/​Support/​ConfiguringNMEARefclocks +    * http://​support.ntp.org/​bin/​view/​Support/​ConfiguringGarminRefclocks 
-    * I think it's worth noting that my jitter is WAY lower than being reported there. One guy is setting 5-10ms jitter while I am reporting ​0.024ms jitter. Either that guy has a bad unit and is being a negative nancy, or firmware updates have made them notably better.+  * Similar to above: 
 +    * http://​support.ntp.org/​bin/​view/​Support/​ConfiguringNMEARefclocks 
 +    * I think it's worth noting that my jitter is WAY lower than being reported there. One guy is setting 5-10ms jitter while I am seeing <0.024ms jitter. Either that guy has a bad unit and is being a negative nancy, or firmware updates have made them notably better.
   * Get serial pass-through working on the TS140. This will take some tinkering but should be doable. Latency is my only concern.   * Get serial pass-through working on the TS140. This will take some tinkering but should be doable. Latency is my only concern.
ntpgps.txt · Last modified: 2018/03/06 08:59 (external edit)
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