Primary Reference Source VCH-001
Primary reference clock (PRC) is intented to be used us the redundant first class SDH synchronization equipment of digital networks telecommunication. PRC VCH-001 meets all requirements and recomendations of ITU G.811.
VCH-001 is based on a Passive Hydrogen Maser having relative frequency accuracy ±3.0×10–13 and maximum time interval error (MTIE) in 10-20 times better than the requirements of ITU-T G.811. Due to triple reserve equipment,VCH-001 provides the highest reliability and stability of output signals. MTIE of switching over to reserve equipment is less than 1 ns.
PRC VCH-001 contains Primary Reference Source VCH-1006C (VCH-1008) - two units, Rubidium Reference Oscillator desciplined by GPS-GLONASS, VCH-311C, Oscillator desciplined by GPS-GLONASS, VCH-311C, Oscilloquartz 5548C Signal Synchronization Unit (Smart SSU) and personal computer for control and monitoring functions.
Primary Reference Source VCH-1006C (VCH-1008C) having the best time and frequency stability — 2×10–14 per day; 1×10–12 per second, permits to solve any problem of timing at SDH networks easily.
Built in frequency comparison system based on the Oscilloquartz 5548C monitoring system and the GLONASS/GPS PRS VCH-311 C provides PRC diagnostics and self-calibration.
The Oscilloquartz 5548C Network Synchronization Unit (Smart SSU) is specially designed to provide the best timing at SDH network. It has E1 and T1 signals inputs. Smart SSU is a modular, fully redundant timing distribution system for 2048 kbps primary rate networks. The unit tracks incoming clock references, qualifies the signals against network timing standards, then filters and distributes precise timing standards, then filters and distributes precise timing to all equipment in the node.
Incoming reference signals come from frequency standards, GPS reference sources, or E1 signals. Smart SSU meets ETSI and ITU-T synchronization standards and provides holdover hat exceeds the requirement for strdtum-2 transit and local node performance.
Smart SSU has vast memory of up to 1000 events. In case such as jitter, excessive pointer adjustments, operator errors, frequency standard failure or transmission problems in the network , the unique system Oscilloquartz 5548C provides insurance from slips switching over to the reserve inputs.
Software: Software for local control and monitoring is applied. VCH-901 Network control and monitoring program (option).
Power: DC: (38.4÷57.6) V, two inputs.
Power consumption: 600 W.
Dimensions (W×H×D): 600mm×2020mm×600mm.
Weight: 240 kg.
Warranty: 3 years.
Life time: 15 years.