n1 is a stratum 1 server steered by pair of GPS receivers.
n1 exists because I need a reliable source of time. One where I know it'll either give correct time,
or be honest and say it is unsynchronized. I've been burned one time too many.
Apparently has yet another module that does bad things to TTYs. It apprarently sends commands that brings the receiver into firmware update mode.
2020.6.24: Yet another receiver upgrade.
The MC-1010 had had a hard life (I applied 3.3V 1.5A the wrong way on the supply) and I suspect not all is well with it.
So it got replaced with the 'unicorn receiver' that never made it to production: MTK3339 based, but with the '155dB neighbour rejection' front end.
Still running at 115200N81, and I suspect there is some SMM
interrupt in the server causing the port to lose characters every few months, but now, at least, it is a known good receiver.
Server was running stratum 2 off of a local S1 for a few hours until I could verify that the GPSes were setup correctly.
2020.5.16: Receiver bug? Investigtion ongoing
Apparently the MC-1010 randomly gives out incorrect time, stepping 19 seconds out?
Logging is enabled, and I have put in a bit of step-out protection code.
2020.4.26: Receiver bug
Note to future self: The MC-1010's output is all over the place in 1Hz mode.
In 2Hz, 5Hz, and 10Hz mode it is fine.
2020.4.23: New receiver
Now running LocoSys MC-1010 and Skytraq Venus receivers.
2019.12.13: Server replacement
I replaced the hardware with something faster, more efficient, and with dual power supplies.
At the same time, I forgot to put in the additional serial card for the GPS receivers, so at the moment
the server is running off of a GPS receiver in the vault. It is getting a surprisingly good signal through
40cm of steel reinforced concrete and fire barrier.