Recently i’ve found some great codes from Tom Van Baak (Leapsecond) and use them as frequency dividers. You can find the *.hex and *.asm here I’ve burned some PIC 12F675 using a PIC programmer to have some CMOS TTL frequencies for various applications One of them was to use the M100, a great military Rubidium […]
In an age when time synchronization is getting vital and faster (NTP) and more accurate (PTP – IEEE 1588 ) with increasingly high performance network protocols, there are still glorious time codes used to synchronize time reference units or clients on primary time and frequency standards .One of them it is the IRIG-B. Recently i […]
I’ve tested the server into two different environments: LAN and WAN. I confirm the relatively small capacity of the Soekris to support 200-300 units connected to it for NTP UDP as ideal load without alter performances.Of course the major limits comes with Ethernet , T1 and line speed. We could never get nanoseconds over there […]
All is mounted inside my old 2850 rack case, ready to launch The software it’is basically a shell script that resides in FreeBSD sources , and usually you can find it as nanobsd.sh under the folder /usr/src/tools/tools/nanobsd/ . It creates a very little version of FreeBSD that fit into a common 512 MB Compact Flash card. […]
First operative test of the RB Stratum 1 Server Following Poul-Henning Kamp project to modify a 4501 router to build a Stratum 1 NTP server , I’ve decided to build my own using instead a Rubidium Frequency standard source of 10 MHz to clock the Elan processor inside the Soekris. It requires some hardware changes […]
Delta² 