  The Square Kilometer Array (SKA) is an international effort to build the
world's largest radio telescope, with one square kilometer collecting area.
Besides its ambitious scientific objectives, such as probing the cosmic dawn
and cradle of life, SKA also demands several revolutionary technological
breakthroughs, with ultra-high precision synchronisation of the frequency
references for thousands of antennas being one of them. In this report, aimed
at applications to SKA, we demonstrate a frequency reference synchronization
and dissemination scheme with the phase noise compensation function placed at
the client site. Hence, one central hub can be linked to a large number of
client sites, forming a star-shaped topology. As a performance test, the 100
MHz reference signal from a Hydrogen maser clock is disseminated and recovered
at two remote sites. Phase noise characteristics of the recovered reference
frequency signal coincides with that of the hydrogen-maser source and satisfies
SKA requirement.
