The Spectracom 8140VT-75-00 is a 1U rack-mountable GPS time and frequency synchronization unit engineered for critical infrastructure, telecommunications, and secure network environments. It provides phase-continuous 10 MHz frequency and 1 Pulse Per Second (PPS) timing outputs synchronized to GPS/GNSS satellite signals. The modular architecture accommodates up to six input/output option cards, enabling customization for diverse synchronization requirements across military, telecom, and network timing applications.
Technical Specifications
Synchronization Sources:
• Primary: GPS/GNSS satellite system with L1/L2 support
• Multi-GNSS configurations available: GPS, Galileo, GLONASS, BeiDou
• SAASM (Selective Availability Anti-Spoofing Module) GPS receivers for authorized military users
• Multi-GNSS (GPS/GLONASS) input as configurable option
• IRIG input supported
• Signals of Opportunity for resilience and indoor applications
Base Unit Outputs:
• 10 MHz frequency signal
• 1 Pulse Per Second (PPS) timing signal, phase-continuous
Internal Oscillator Options:
• TCXO (Temperature Compensated Crystal Oscillator)
• OCXO (Oven Controlled Crystal Oscillator)
• Rubidium Oscillator
Modular Output Expansion (up to 6 cards per unit):
• Programmable Frequency Synthesizers: 4 independent outputs per module, 1 PPS to 25 MPPS with 0.1-degree phase offset resolution
• Time Code Outputs: IRIG, ASCII, HaveQuick formats
• Telecom T1/E1: T1 at 1.544 MHz (75 Ω or 100 Ω); E1 at 2.048 MHz (75 Ω or 120 Ω)
• 1 PPS Output Types: TTL, 10V, RS-485 (terminal block), Fiber Optic
• Additional Frequency Outputs: 5 MHz, 2.048 MHz, 1.544 MHz
• NTP v4 support with optional multi-port configuration
Environmental:
• MIL-STD-810F environmental performance standards
• Rugged chassis design
– Key Features
• Phase-continuous timing outputs eliminate discontinuities in frequency and timing signals
• Multi-GNSS reception enhances availability and resilience
• Independent frequency synthesizer channels enable simultaneous multi-format outputs
• Flexible 1 PPS signal conditioning across TTL, 10V, RS-485, and fiber optic formats
– Typical Applications
• Military and government secure networks (SAASM configurations)
• Telecommunications synchronization (T1/E1 distribution)
• Critical infrastructure timing and frequency reference
• Network timing protocols (NTP v4 deployment)
• Holdover and backup timing scenarios via internal oscillators
– Compatibility & Integration
Supports NTP v4 for network-based time distribution. IRIG input allows synchronization with legacy timing systems. Modular expansion supports telecom industry standards (T1/E1 rates and impedance levels).
