I have uploaded a small video which demonstrates the short and medium term stability of the 10GHz beacon (more precise of the beacon-transverter combination). It is a 40min recording sped up. The beacon switches between a 1 minute continuous carrier and a 1 minute on-off keying with 50% duty cycle. A total drift of about 1.5KHz is demonstrated.
Video link: http://www.youtube.com/watch?v=yoRTA_F3q2M