Brandywine RFS-700D, Руководство пользователя, Страница: 5 / 18

P/N 900000181 REV. A
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1 Introduction
1.1 Basic Concept
Figure 1 - RFS-700D
Brandywine’s RFS-700D is a miniaturized Rubidium Frequency Reference in a
compact ruggedized package designed for mounting on a DIN rail system. The
RFS-700D is capable of outputting 7x 10MHz frequency reference with low phase
noise.
The frequency standard includes a low phase noise oven controlled quartz
oscillator, which is frequency locked to the rubidium oscillator. The time constant of
this loop is selected such that the short term stability (and phase noise) of the
outputs are determined by the OCXO characteristics, which the long term stability is
determined from the rubidium oscillator.
The frequency standard has internal temperature sensors that are used to
compensate the oscillator, based on a factory calibration, to improve the overall
accuracy of the system.
The unit has been qualified under MIL-STD-810F for operation in demanding
environments.