Some recent GPS modules (ublox Neo 7) have a programmable output that in addition to the 1 pps output can be programmed even to output 10 MHz. This output has a lot of jitter as it seems to be derived from a 48 MHz clock which is divided down in such a way as to generate a mix of short and long cycles but so that the average frequency is maintained accurately at 10 MHz.
A description can be found here https://sites.google.com/site/g4zfqradio/u-blox_neo-6-7 and performance is partly described here: https://www.febo.com/pipermail/time-nuts/2014-August/086257.html My question is regarding the K3 external reference input. Is this source good enough to drive the K3 reference? Can the K3 clean up the jitter internally, or does the K3 require a source with much less phase noise? ----- Sverre, LA3ZA K2 #2198, K3 #3391, LA3ZA Blog: http://la3za.blogspot.com, LA3ZA Unofficial Guide to K2 modifications: http://la3za.blogspot.com/p/la3za-unofficial-guide-to-elecraft-k2.html -- View this message in context: http://elecraft.365791.n2.nabble.com/Frequency-reference-for-the-K3-directly-off-a-GPS-tp7606275.html Sent from the Elecraft mailing list archive at Nabble.com. ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
