====== Trimble 4000 Series ======

==== Resources ====

  * https://forum.vcfed.org/index.php?threads/vintage-gps-with-unknown-virtual-machine.1248025/
  * http://beefchicken.com/gps/trimble/4000
  * https://rpls.com/forums/gnss-geodesy/trimble-4000sse-week-rollover-problem-fixed/
  * ....