Me: has GPS-synced time server for his house Also me: still struggles to get anywhere on time
3 days ago
| 39
That's awesome! Assuming this is an NTP server and now I want to make one quite badly
4 days ago (edited)
| 35
I am a service electrician in 4 office towers. We did a fire alarm verification last night, and at the end, the engineer noted that the PC running fireworks was out of sync with the time. As this system has to be air gapped, it is not connected to the internet and doesn't have the ability to get a time signal. I am going to propose building a pi NTP server for each, solving the problem. All because you showed me it is possible.
4 days ago (edited)
| 22
For best timing results you want to use satellites that are overhead or at least high in the sky. You might want to investigate specific antenna types, like the "choke ring" that give optimal performance for timing applications.
3 days ago | 0
Have one that was installed at a tx site for dab+, to run the encoders, the actual dab+ tx was km's away
2 days ago | 0
Just tossed my first home made NTP based on a Garmin 18 puck and some really poorly soldered db9 and USB power leads. Was a fun project back then.
4 days ago
| 6
Once everything is as close to working as you can get it, don't forgot to create a timelord@ email address for the relevent domains 🙂
4 days ago
| 13
When you figure out the secret to making more time, please do a video on that!
4 days ago
| 3
Nice to see some slack left as a drip loop 🙂 Watching with interest but zero plans to implement a GPS time base here TBH
3 days ago
| 1
I'm always surprised that my servers are reasonably sync'd. The only time I really installed GPS antennas was for a former employer where I deployed (and configured) cell sites: these needed GPS sync so they knew if they were licensed to operate (transmit) in that area, and for transmit sync. You could get a lot out of spectrum reuse having all your sites precisely time synchronized (so they base stations transmit the TDD downlink at the same time, and listen for the UE's to transmit at the same time during the uplink slot.) USERPLANE, SCTP, BBU, UE, RRU.... the acronyms never stop 😭😂
3 days ago
| 2
(And no, I haven't yet secured the cable to the wall outside, forgot to bring my hammer drill today...)
4 days ago | 10
We all know where this is ending. Should we encourage Curous Marc to contact you or have you already reached out 😂
3 days ago
| 3
Jeff Geerling
The timing rabbit hole goes deep...
GNSS antenna installed—thanks to Dad for the help! Took a while to get everything ready, including the lightning protection (to be improved further), KF7P cable entrance box, and everything else.
2nd part of my 2025 Time series will be coming soon...ish. Once I figure out how to make more time.
4 days ago | [YT] | 1,300