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 […]
I Recently found a couple of Lucent RFTG at less than 200$, always on eBay ,from a stock in California. These Redundant Frequency and Time Generator, or RFTG were used in big Cell stations to provide high frequency standards. it’s also available the “yellow tuna” type, the RFG-RB, that is of course more expensive and […]
The Raspberry Pi B 512 MB connected to my “old” Aspire One with a crossover cable If you need precise and accurate time for your projects while sampling a digital record or doing something that need precise timestamps you can use a Raspberry Pi with the Adafruit Breakout GPS module to build a stratum 1 NTP […]
During these days i was searching for something modular and scalable that can gives me a clear PPS ( http://en.wikipedia.org/wiki/Pulse_per_second ) from a GPS satellite with some datas like UTC times.I’ve tested the Arduino UNO board with the Adafruit GPS module. It’s very easy to use them on a little breadboard. The Adafruit GPS is […]
Delta² 