Frequency reference for the K3 directly off a GPS

Posted by Sverre Holm (LA3ZA) on Aug 13, 2015; 1:36pm
URL: http://elecraft.85.s1.nabble.com/Frequency-reference-for-the-K3-directly-off-a-GPS-tp7606275.html

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?