[time-nuts] Re: NTP server replacement GPS receiver

[Fleeson, Richard]

Time-nuts,

Yes I was able to get the replacement Heols GPS board to work in my Symmetricom S200.  But I could not get it to work in my Symmetricom S350.  The S350 NTP Reach value stayed at zero and never started claiming to 377.  Does anyone know if a software update is also required on the S350?  If yes does anyone have a copy of the update or know where I could find the update?

Suspect the Heols board corrects the on board bootup date issue.  But the Heols is probably outputting the expanded week count value from the GPS satellites which is tripping up the S350 NTP server?

Richard

-----Original Message-----
From: nlsa--- via time-nuts <time-nuts at lists.febo.com>
Sent: Thursday, March 2, 2023 9:19 AM
To: time-nuts at lists.febo.com
Cc: nlsa at nlsa.com
Subject: [time-nuts] NTP server replacement GPS receiver

** WARNING EXTERNAL EMAIL **

Dear friends,

Those of you who have their own in-house NTP server may have experienced failure last year.  This was due to a GPS week rollover that many timing receivers could not cope with.  Suddenly your NTP server can’t figure out the week and faults out.



I have found a replacement receiver for my SyncServer S250 (also works with S200, S300, etc.).  The new board simply replaces the existing GPS receiver board; swap-out took five minutes.  Total cost including shipping was €170.



Links:

*       https://nam02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.heoldesign.com%2FN01x-Trimble-Lassen-SK2-iQ-sQ-LP-ACE-replacements-boards&data=05%7C01%7Crfleeson%40c-span.org%7Cc4576aeba7b449e60b1208db1b2ee8d4%7C83b501a4d32042618073a3eca4d72dcb%7C0%7C0%7C638133660541059631%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=SO8TzgFwewd89PCtW4u%2B84YOzo1WG%2B4TtZFrlsHDLDs%3D&reserved=0
*       https://nam02.safelinks.protection.outlook.com/?url=https%3A%2F%2Ftrends.directindustry.com%2Fheol-design%2Fproject-57722-1149241.html&data=05%7C01%7Crfleeson%40c-span.org%7Cc4576aeba7b449e60b1208db1b2ee8d4%7C83b501a4d32042618073a3eca4d72dcb%7C0%7C0%7C638133660541059631%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=rt19%2Bqh1HcrPC7ppwNUF0HBt03934ntdr8gvHe565uk%3D&reserved=0



Michael

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