Brandywine Frequency Reference Unit (FRU)

Brandywine Frequency Reference Unit (FRU)

Product Overview:

  • Ultra-stable GPS Disciplined Frequency Reference
  • 10 Independent 10MHz outputs
  • 1U chassis
  • Meets MIL-STD-188-164A stability requirements
  • Frequency accuracy to 1 x 10-12
  • Dual Port NTP Server

 

 

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The FRU is a state of the art, high-precision frequency standard capable of outputting ten isolated precision 10MHz frequency reference outputs. The FRU uses an internal GPS receiver to control a precision oscillator with accuracy up to 1 x 10-12 and excellent short term stability.  The FRU meets the frequency stability requirements of MIL-STD- 188-164A for SHF terminals.  A particular feature of the FRU is the ultra-high isolation (>100dB) between the 10MHz outputs, eliminating interaction between 10MHz outputs when they are loaded/unloaded. The FRU incorporates a high-sensitivity 12 channel GPS receiver.
 
Dual Ethernet ports are used for both monitoring/control of the FRU using Simple Network Monitoring Protocol (SNMP) as well as providing Network Time Protocol (NTP) to clients. A Brandywine supplied user application may also be used to provide a Graphical User Interface to the FRU. The FRU is available is a number of configurations to support specific applications. A mobile application version features a special vibration isolated oscillator that provides isolation of the reference source from portable generator induced phase noise. The High Performance version uses a rubidium oscillator.  A SAASM GPS receiver is available for military applications.

 

 

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