I'm building a small series of GPS+OCXO based NTP servers, and
as part of that project, I currently have 10 identical
Motorola M12+Timing GPS receivers available.
I'm building a small series of GPS+OCXO based NTP servers, and
as part of that project, I currently have 10 identical
Motorola M12+Timing GPS receivers available.
The receivers are the "remote" version where the receiver is colocated with the antenna. The advantage to this arrangement is mainly one of cabeling: Normal GPS antenna coax is expensive and lossy, making long cable-runs a major problem. The remote version instead has only approx. .5" coax cable to the antenna and up to 1km of cable with a robust RS-422 serial signalling between the computer and the GPS receiver.
I have mounted them on a piece of 2 by 4 with a spacing of 20cm, and put them the op the top of my shed which is the best reception I will get with the cable-length I have.
In addition to the necessary quality-tests on the NTP servers, I plan to run a number of experiments on them while I have this rather unique opportunity.
Ideas for interesting measurements are most welcome, and the results will be posted here as I have them.
