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Frequency Reference Unit

Frequency Reference Unit

Frequency Reference Unit

Product catalog summary
Overview: The Frequency Reference Unit (FRU-SAASM) by Brandywine Communications is a high-precision frequency standard designed for military and high-performance applications. It features ultra-stable GPS disciplined frequency reference outputs and meets stringent military standards.
Key Features:
  • Ultra-stable GPS Disciplined Frequency Reference
  • 10 independent 10MHz outputs with high isolation (>100dB)
  • 1U chassis design
  • Meets MIL-STD-188-164A stability requirements
  • Frequency accuracy up to 1 x 10-12
  • Dual Port NTP Server for network time synchronization
Technical Specifications:
  • Inputs: GPS Antenna Input (BNC), 1PPS input (DB-15, 0-10Vpk, 50 Ω), HAVEQUICK Input (DB-15, 0-5Vpk, 2 kΩ)
  • Outputs: 10MHz outputs (10 outputs, +13dBm amplitude, <40dBc harmonics, <90dBc non-harmonic, <-100dBc isolation), 1PPS Output (±50ns accuracy, DB-15, 0-10Vpk, 50 Ω), HAVEQUICK Output (DB-15, 0-5Vpk)
  • Power: 90 VAC to 260 VAC, <15 Watts, optional dual redundant power
  • Control and Status: 10/100BaseT Ethernet, 2 independent ports, supports IPV4, IPV6, SNMPv1, V3, NTPV3, V4, graphical interface via BWC Application
  • GPS Receiver: GB-GRAM type, L1, L2 dual frequency, 12 channel parallel receiver, 16m SEP positional accuracy
  • Reliability: MTBF >70,000 hours
  • Physical: 1U size, 19”x1.72x14” depth
  • Environmental: 95% non-condensing humidity, 0 to +50ºC operating temperature, -40 to +85ºC non-operating temperature, -20 to +70 ºC temperature shock, 1.5g peak vibration, MIL-STD-188-164A shock compliance
Applications: The FRU is available in various configurations, including a mobile application version with a vibration isolated oscillator and a high-performance version with a rubidium oscillator. A SAASM GPS receiver is available for military applications.
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Catalog excerpts

Frequency Reference Unit-1

brandywine communications Frequency Reference Unit (FRU-SAASM) Features: • 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 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 . 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." "

 Open the catalog to page 1
Frequency Reference Unit-2

brandywine communications FRU Technical Specifications Input: GPS Antenna Input Connector 1PPS input Connector Level Impedance HAVEQUICK Input Level Impedance Outputs: 10MHz outputs No of Outputs Frequency Accuracy Amplitude Harmonics Non Harmonic Isolation 90 VAC to 260 VAC <15 Watts. Dual Redundant Power (opt) Control and Status: Type 10/100BaseT Ethernet No of Ports 2 independent Protocol IPV4, IPV6 SNMPv1, V3 (opt) NTPV3, V4 (opt) Graphical Interface BWC Application GPS Receiver Receiver Type Frequency Satellite Code Receiver Type Pos. Accuracy Warm start GB-GRAM L1, L2 Dual Frequency C/A,...

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Archived catalogs

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