A Hydrogen Maser is an instrument that provides a timing signal
to be used as the basis of reference for the control of other clocks
within a network. The long-term accuracy of that signal is maintained
at 1 x 10-11 or better. This primary
reference source generates a timing signal completely autonomous
of other references using passive or active hydrogen maser technology.
Manufactured in Europe by Vremya-CH, 67, Osharskaya Str., 603105,
Nizhny Novgorod, Russia